Polarimetry in Hall A

Size: px
Start display at page:

Download "Polarimetry in Hall A"

Transcription

1 Outline E.Chudakov Moller-12 Workshop, Aug 2008 Polarimetry in Hall A 1 Polarimetry in Hall A E.Chudakov 1 1 Hall A, JLab Moller-12 Workshop, Aug 2008

2 Outline E.Chudakov Moller-12 Workshop, Aug 2008 Polarimetry in Hall A 2 Outline 1 Introduction Compton and Møller Polarimetry 2 Polarimeter in Hall A Compton Polarimeter Møller Polarimeter High field upgrade Atomic hydrogen trap 3 Summary Summary

3 Outline E.Chudakov Moller-12 Workshop, Aug 2008 Polarimetry in Hall A 2 Outline 1 Introduction Compton and Møller Polarimetry 2 Polarimeter in Hall A Compton Polarimeter Møller Polarimeter High field upgrade Atomic hydrogen trap 3 Summary Summary

4 Outline E.Chudakov Moller-12 Workshop, Aug 2008 Polarimetry in Hall A 2 Outline 1 Introduction Compton and Møller Polarimetry 2 Polarimeter in Hall A Compton Polarimeter Møller Polarimeter High field upgrade Atomic hydrogen trap 3 Summary Summary

5 E.Chudakov Moller-12 Workshop, Aug 2008 Polarimetry in Hall A 3 Compton versus Møller Polarimetry Compton Polarimetry Møller Polarimetry A = 7 9 lab 180 mb ster Kinematics/asymmetry Rad. corr. to Born < 0.1% Detect γ at 0, e < E beam Strong da dk - need σe γ/e γ 1 A ke at E < 20 GeV k 4γ 2 k T 1/(σ A 2 ) 1/k 2 1/E 2 Rad. corr. to Born < 0.3% Detect the e at θ CM 90 da dθ CM good systematics A(E) const, dσ dω s 1 Coincidence - no background

6 E.Chudakov Moller-12 Workshop, Aug 2008 Polarimetry in Hall A 3 Compton versus Møller Polarimetry Compton Polarimetry Møller Polarimetry A = 7 9 lab 180 mb ster P laser 100% Non-invasive measurement Polarized target Ferromagnetic target P T 8% > 1 µm: invasive Beam I B < 2 4 µa (heating) Levchuk effect Low P T dead time Syst. error σ(p T ) 2% for B < 2T 0.3% for B > 3T

7 E.Chudakov Moller-12 Workshop, Aug 2008 Polarimetry in Hall A 3 Compton versus Møller Polarimetry Compton Polarimetry Møller Polarimetry A = 7 9 lab 180 mb ster Syst. error 3 50 GeV: % Hard at < 1 GeV: (JLab project) 0.8% Accuracy Syst. error 3% typically, 0.5%(1%?) at high magn. fields

8 E.Chudakov Moller-12 Workshop, Aug 2008 Polarimetry in Hall A 4 Compton Polarimeter at low enegy: CW cavity Electron Beam Electrons detector E Magnetic Chicane λ =1064 nm, k=1.65 ev P=1kW Beam: GeV Beam: µa at 500 MHz Laser: 1064 nm, 0.24 W Fabry-Pérot cavity kw Crossing angle 23 mrad e detector - Silicon µ-strip γ detector - calorimeter Stat: 1.0% 30 min, 4.5 GeV, 40 µa Syst: 1.2% at 4.5 GeV E k Photons detector Upgrade Plans - 1% at 0.85 GeV Laser: 532 nm, 0.1 W Cavity kw Detector upgrade

9 E.Chudakov Moller-12 Workshop, Aug 2008 Polarimetry in Hall A 5 Electron and Photon Detection Photon Detector Electron Detector 4 planes 48 strips 650 µm New: 192 strips 250 µm Calibration for photon detector PbW, cm 3 1 central crystal used New: one large GSO crystal

10 E.Chudakov Moller-12 Workshop, Aug 2008 Polarimetry in Hall A 6 Existing Compton Polarimeter at 1064 nm source A error Asymmetry Statistical 0.80% Position and angle 0.30% Background 0.05% Dead time 0.10% Cuts 0.10% Light Polarization 0.50% Analyzing power Response function 0.45% Calibration 0.60% Pile up 0.45% Rad. correction 0.26% Total systematic 1.15% Total 1.40% δp e /P e (%) Syst. Syst. + 1% Stat E (GeV)

11 E.Chudakov Moller-12 Workshop, Aug 2008 Polarimetry in Hall A 7 Hall A Møller Polarimeter Y cm X cm Target commissioned target upgrade Collimator Coils Quad 1 Quad 2 Quad 3 Dipole non-scattered beam Z cm target upgrade planned (high field) Detector (a) (b) Z cm B GeV Minimal Levchuk σ stat = 1% in 2 3 min B Z 25 mt field Foil at 20 to field Foils 5 30µm thick Beam <2µA

12 E.Chudakov Moller-12 Workshop, Aug 2008 Polarimetry in Hall A 8 Systematic Errors The goal for the systematic error Variable Error OLD Present PREX goal Target polarization 3.5% 2.0% 0.5% Target angle 0.5% 0.5% 0.0% Analyzing power 0.3% 0.3% 0.3% Levchuk effect 0.2% 0.2% 0.2% Dead time 0.3% 0.3% 0.3% Others % Total 3.6% 2.1% 1.0%

13 E.Chudakov Moller-12 Workshop, Aug 2008 Polarimetry in Hall A 9 How to measure the real beam? PREX will run at 50 µa Target heating < 50 K to avoid errors on depolarization Run the injector as close to the regular running as possible Average current I beam < 2 µa T <30 K Laser cycle: 1 ms pulse at 30 Hz T pulse 12 K Beat frequency laser chopper: 500 MHz 500/4 MHz Lower average rate 1% statistically in min

14 E.Chudakov Moller-12 Workshop, Aug 2008 Polarimetry in Hall A 10 Appendix:Bunch suppression Options (from the draft of a paper by M.Poelker et al) G0: laser running at 499/16MHz - too long to install For regular bunch charges: laser at F laser < F RF bunch suppresssion on the chopper. Beat frequency condition (F RF = 499MHz): F laser (n + 1) =F RF n, n = 3, 4, 7, 15, 31,... - magic numbers regular F laser = F RF n = 15 continuous

15 E.Chudakov Moller-12 Workshop, Aug 2008 Polarimetry in Hall A 11 Appendix:Beat frequency mode - leak through Pulses overlap τ pulse 200 µa τ pulse grows with I beam (electro-repulsion) Fully open slit 110 ps No leak: τ > 160 ps Appendix:Optimization n=15 same slit τ = 133 ps, contamination 5% - bad n=7 same slit τ = 285 ps, no contamination; other slit τ = 95 ps leak 30% - invasive for other halls n=4 other slit τ = 166 ps non-invasive?

16 E.Chudakov Moller-12 Workshop, Aug 2008 Polarimetry in Hall A 12 Macro-pulsing - tune beam Pulses t > 4 µs at repetition rate k 30 Hz Limitation: at I inst = 50 µa accelerator stabilization time 100 µs No micro-suppresssion: t = 1 ms at 30 Hz Micro-suppresssion n=4: t = 1 ms at 120 Hz

17 E.Chudakov Moller-12 Workshop, Aug 2008 Polarimetry in Hall A 13 Polarized atomic hydrogen in a cold magnetic trap beam H 0.3K Ultra-cold traps 30K 40 cm Solenoid 8T Storage Cell E. Chudakov and V. Luppov, IEEE Trans. Nucl. Sci. 51, 1533 (2004). 4 cm Atom H 1 : µ µ e, E = µ B Population exp( E/kT ) At 300 mk P e Density cm 3 Lifetime > 1 h Stat. 1% in 10 min at 100 µa Contamination and Depolarization at 100µA CEBAF Hydrogen molecules < Upper states c and d < 10 5 Excited states < 10 5 Helium, residual gas <0.1% - measurable Depolarization by beam RF < Ion, electron contamination < 10 5 Ionization heating < Expected depolarization < 10 4 Limitations Problems Ib 2 /F continuous beam Complexity of the target Advantages Expected accuracy < 0.5% Non-invasive, continuous, the same beam

18 E.Chudakov Moller-12 Workshop, Aug 2008 Polarimetry in Hall A 14 Summary Møller polarimetry in Hall A Old: 2.1%, using 8% Fe at 25 mt, invasive New: 1%, using 8% Fe at 4T, invasive May provide < 0.5% accuracy with 100% polarized hydrogen, non-invasive, continuous Compton polarimetry in Hall A Accuracy 1%(4GeV ) 0.5%(11GeV ), non-invasive

Møller Polarimetry in Hall A and Beyond

Møller Polarimetry in Hall A and Beyond Outline E.Chudakov EIC, Ann Arbor, Aug 2007 Møller Polarimetry: Hall A and beyond 1 Møller Polarimetry in Hall A and Beyond E.Chudakov 1 1 Hall A, JLab EIC Polarimetry Workshop, Ann Arbor, Aug 23-24, 2007

More information

Electron Beam Polarimetry: Status and Prospects. DIS 2005, Madison, April 2005 E. Chudakov (JLab)

Electron Beam Polarimetry: Status and Prospects. DIS 2005, Madison, April 2005 E. Chudakov (JLab) Electron Beam Polarimetry: Status and Prospects DIS 2005, Madison, April 2005 E. Chudakov (JLab) Motivation: what accuracy is required for various experiments Methods in use: Optical methods Mott scattering

More information

Møller Polarimetry for PV Experiments at 12 GeV

Møller Polarimetry for PV Experiments at 12 GeV Outline E.Chudakov Jan 15, 2010, MOLLER Review Møller Polarimetry 1 Møller Polarimetry for PV Experiments at 12 GeV E.Chudakov 1 1 JLab MOLLER Review Outline E.Chudakov Jan 15, 2010, MOLLER Review Møller

More information

Møller Polarimetry on Atomic Hydrogen

Møller Polarimetry on Atomic Hydrogen E.Chudakov June 21, 2011 Møller Polarimetry on Atomic Hydrogen 1 Møller Polarimetry on Atomic Hydrogen E.Chudakov 1 1 JLab Meeting at UVA Outline E.Chudakov June 21, 2011 Møller Polarimetry on Atomic Hydrogen

More information

Møller Polarimetry for PV Experiments at 12 GeV

Møller Polarimetry for PV Experiments at 12 GeV Outline E.Chudakov Jan 15, 2010, MOLLER Review Møller Polarimetry 1 Møller Polarimetry for PV Experiments at 12 GeV E.Chudakov 1 1 JLab MOLLER Review Outline E.Chudakov Jan 15, 2010, MOLLER Review Møller

More information

Beam Polarimetry (for Future Experiments at JLab)

Beam Polarimetry (for Future Experiments at JLab) Outline E.Chudakov June 24, 2009, PAVI-09 Beam Polarimetry 1 Beam Polarimetry (for Future Experiments at JLab) E.Chudakov 1 1 JLab PAVI-09 Outline E.Chudakov June 24, 2009, PAVI-09 Beam Polarimetry 2 Outline

More information

Toward 0.5% Electron Beam Polarimetry. Kent Paschke University of Virginia

Toward 0.5% Electron Beam Polarimetry. Kent Paschke University of Virginia Toward 0.5% Electron Beam Polarimetry Kent Paschke University of Virginia Needs for 0.5% The proposed PV-DIS experiments may be systematics limited, with fractional errors approaching 0.5%. No

More information

Electron Beam Polarimetry at JLab

Electron Beam Polarimetry at JLab Electron Beam Polarimetry at JLab Experiments using polarized electrons at JLab JLab polarized beam Polarimetry at JLab: Mott polarimetry Møller polarimetry Compton polarimetry Special challenges of new

More information

Electron Polarimetry Overview

Electron Polarimetry Overview E.Chudakov IEB 2015, Cornell Electron Polarimetry Overview 1 / 35 Electron Polarimetry Overview E.Chudakov 1 1 JLab Workshop: Intense Electron Beams (IEB) June 17-20, Cornell, NY Outline E.Chudakov IEB

More information

Electron Beam Polarimetry at Jefferson Lab Dave Gaskell Jefferson Lab (Hall C)

Electron Beam Polarimetry at Jefferson Lab Dave Gaskell Jefferson Lab (Hall C) Electron Beam Polarimetry at Jefferson Lab Dave Gaskell Jefferson Lab (Hall C) CASA Beam Physics Seminar February 14, 2008 1. Motivation: Why do we care so much about polarimetry? 2. Overview of JLab polarimeters

More information

The low Q 2 chicane and Compton polarimeter at the JLab EIC

The low Q 2 chicane and Compton polarimeter at the JLab EIC EPJ Web of Conferences 112, 01007 (2016) DOI: 10.1051/ epjconf/ 201611201007 C Owned by the authors, published by EDP Sciences, 2016 The low Q 2 chicane and Compton polarimeter at the JLab EIC, Alexandre

More information

1. Polarimetry Strategy 2. Møller Polarimeter 3. Compton Polarimeter 4. Summary

1. Polarimetry Strategy 2. Møller Polarimeter 3. Compton Polarimeter 4. Summary Vladas Tvaskis (University of Manitoba) Hall C Users Meeting January 202. Polarimetry Strategy 2. Møller Polarimeter 3. Compton Polarimeter 4. Summary Q Weak requires measurement of the beam polarization

More information

Electron Beam Polarimetry at JLab Hall C Dave Gaskell PST 2009 September 7, 2009

Electron Beam Polarimetry at JLab Hall C Dave Gaskell PST 2009 September 7, 2009 Electron Beam Polarimetry at JLab Hall C Dave Gaskell PST 2009 September 7, 2009 1. Møller Polarimeter 2. Compton Polarimeter 3. Summary JLab Polarimetry Techniques Three different processes used to measure

More information

Overview on Compton Polarimetry

Overview on Compton Polarimetry General Issues O spin motion & alignment tolerances O beam-beam effects & upstream vs. Downstream Compton Polarimetry Basics O beam parameters & Compton detection methods O kinematics, cross sections &

More information

EIC Electron Beam Polarimetry Workshop Summary

EIC Electron Beam Polarimetry Workshop Summary EIC Electron Beam Polarimetry Workshop Summary W. Lorenzon Randall Laboratory of Physics, University of Michigan, Ann Arbor, Michigan 48109-1040, USA Abstract. A summary of the Precision Electron Beam

More information

Polarimetry. POSIPOL 2011 Beijing Peter Schuler (DESY) - Polarimetry

Polarimetry. POSIPOL 2011 Beijing Peter Schuler (DESY) - Polarimetry Polarimetry Overview Compton Transmission Polarimetry at source energy Bhabha Polarimetry at 400 MeV Compton Polarimetry at 5 GeV Compton Polarimetry at full energy 1 Suitable Processes Compton Transmission

More information

EIC Electron Beam Polarimetry Workshop Summary

EIC Electron Beam Polarimetry Workshop Summary EIC Electron Beam Polarimetry Workshop Summary W. Lorenzon Randall Laboratory of Physics, University of Michigan, Ann Arbor, Michigan 48109-1040, USA Abstract. A summary of the Precision Electron Beam

More information

The JLEIC electron low Q 2 chicane and Compton polarimeter

The JLEIC electron low Q 2 chicane and Compton polarimeter The JLEIC electron low Q 2 chicane and Compton polarimeter INPC 2016 Alexandre Camsonne, David Gaskell, Joshua Hoskins Hall A Jefferson Laboratory September 12 th 2016 JLEIC Layout Warm Electron Collider

More information

Parity Violation Experiments

Parity Violation Experiments Parity Violation Experiments Krishna Kumar University of Massachusetts thanks to the HAPPEX, G0 and Qweak Collaborations, D. Armstrong, E. Beise, G. Cates, E. Chudakov, D. Gaskell, C. Furget, J. Grames,

More information

Progress Report on the A4 Compton Backscattering Polarimeter

Progress Report on the A4 Compton Backscattering Polarimeter A4 Progress Report on the A4 Compton Backscattering Polarimeter Yoshio Imai, Institut für Kernphysik, Universität Mainz 8.6.24 International Workshop on Parity Violation and Hadronic Structure, LPSC Grenoble

More information

The Compton backscattering Polarimeter of the A4 Experiment

The Compton backscattering Polarimeter of the A4 Experiment A4 The Compton backscattering Polarimeter of the A4 Experiment Yoshio Imai Institut für Kernphysik, Universität Mainz Polarimeter Group: J. Diefenbach, Y. Imai, J. Lee, M. Sikora, S. Taylor 07.10.2004

More information

Precision High Field Møller Polarimetry in Hall A Status Report

Precision High Field Møller Polarimetry in Hall A Status Report Precision High Field Møller Polarimetry in Hall A Status Report Jim Napolitano, Temple University Work Carried Out by Ted Berger, Ben LeRose (RPI) John LeRose (JJL Magnet Optics) and James Wilhelmi and

More information

PoS(PSTP 2013)034. Precession Polarimetry at JLab, 6 GeV. G.B. Franklin Carnegie Mellon University

PoS(PSTP 2013)034. Precession Polarimetry at JLab, 6 GeV. G.B. Franklin Carnegie Mellon University at JLab, 6 GeV Carnegie Mellon University E-mail: gbfranklin@cmu.edu The JLab Hall A Compton Polarimeter is used to measure the polarization of the electron beam as it enters the experimental hall. When

More information

A4 Laser Compton polarimetry

A4 Laser Compton polarimetry A4 Laser Compton polarimetry progress since PAVI06 J. Diefenbach Workshop on Parity Violation 2009, Bar Harbor, Maine - 24.06.2009 Outline Principles of Laser Compton polarimetry Experimental Setup Data

More information

Sub-percent precision Møller polarimetry in experimental Hall C

Sub-percent precision Møller polarimetry in experimental Hall C Sub-percent precision Møller polarimetry in experimental Hall C College of William and Mary E-mail: jmagee@jlab.org Modern experiments in Jefferson Lab Hall C require precise knowledge of the electron

More information

EICUG Working Group on Polarimetry. Elke Aschenauer BNL Dave Gaskell Jefferson lab

EICUG Working Group on Polarimetry. Elke Aschenauer BNL Dave Gaskell Jefferson lab EICUG Working Group on Polarimetry Elke Aschenauer BNL Dave Gaskell Jefferson lab 1 Outline Charge Polarimetry Requirements and Goals Electron Polarimetry Hadron Polarimetry Working Group Plans 2 Charge

More information

Precision Polarimetry at JLab, 6 GeV Era G. B. Franklin Carnegie Mellon University

Precision Polarimetry at JLab, 6 GeV Era G. B. Franklin Carnegie Mellon University Precision Polarimetry at JLab, 6 GeV Era G. B. Franklin Carnegie Mellon University Hall A Compton Upgrade Team: M. Friend, D. Parno, F. Benmokhtar, A. Camsonne, G.B. Franklin, R. Michaels, S. Nanda, K.

More information

MØLLER POLARIMETRY WITH ATOMIC HYDROGEN TARGETS. Project Description

MØLLER POLARIMETRY WITH ATOMIC HYDROGEN TARGETS. Project Description MØLLER POLARIMETRY WITH ATOMIC HYDROGEN TARGETS Project Description Revision 2 First version: February 22, 2003 Last revision: January, 2005 E.A. Chudakov Thomas Jefferson National Accelerator Facility

More information

Lepton beam polarisation for the HERA experiments ZEUS and H1

Lepton beam polarisation for the HERA experiments ZEUS and H1 Lepton beam polarisation for the HERA experiments ZEUS and H1 Polarisation at collider machines The HERA storage ring The HERA polarimeters The collider experiments ZEUS and H1 The HERA II upgrade Data

More information

Hall A Compton Calorimeter G. B. Franklin Carnegie Mellon University

Hall A Compton Calorimeter G. B. Franklin Carnegie Mellon University Hall A Compton Calorimeter G. B. Franklin Carnegie Mellon University 1. Compton Scattering Polarimetry General Considerations Complications and Systematic Errors 2. CMU Integrating DAQ Content of Data

More information

Introduction to polarimetry at HERA

Introduction to polarimetry at HERA Introduction to polarimetry at HERA Alex Tapper Electron polarisation at HERA The LPOL The TPOL The LPOL cavity Electron polarisation in storage rings Electron beam deflected around a ring with B field

More information

1 Introduction. THE Q W eak EXPERIMENT: A SEARCH FOR NEW PHYSICS AT THE TeV SCALE. W. Deconinck 1, for the Q W eak Collaboration

1 Introduction. THE Q W eak EXPERIMENT: A SEARCH FOR NEW PHYSICS AT THE TeV SCALE. W. Deconinck 1, for the Q W eak Collaboration THE Q W eak EXPERIMENT: A SEARCH FOR NEW PHYSICS AT THE TeV SCALE W. Deconinck 1, for the Q W eak Collaboration (1) College of William & Mary, Williamsburg, VA, USA E-mail: wdeconinck@wm.edu Abstract The

More information

Compton Storage Rings

Compton Storage Rings Compton Polarimetry @ Storage Rings Wolfgang Hillert ELectron Stretcher Accelerator Physics Institute of Bonn University Møller-Polarimeter Compton-Polarimeter Mott-Polarimeter Compton Scattering Differential

More information

PREX Overview Extracting the Neutron Radius from 208 Pb

PREX Overview Extracting the Neutron Radius from 208 Pb PREX Overview Extracting the Neutron Radius from 208 Pb Seamus Riordan University of Massachusetts, Amherst sriordan@physics.umass.edu March 17, 2013 Seamus Riordan CREX 2013 PREX 1/19 Outline Motivation

More information

Parity Violation Experiments & Beam Requirements

Parity Violation Experiments & Beam Requirements Parity Violation Experiments & Beam Requirements Riad Suleiman Center for Injectors and Sources MCC Ops Training August 05, 2009 Outline Fundamental Interactions and Conservation Rules Parity Reversal

More information

The Lead Radius Experiment PREX. Dustin McNulty Idaho State University for the PREx Collaboration July 28, 2011

The Lead Radius Experiment PREX. Dustin McNulty Idaho State University for the PREx Collaboration July 28, 2011 The Lead Radius Experiment PREX Dustin McNulty Idaho State University for the PREx Collaboration mcnulty@jlab.org July 28, 2011 The Lead Radius Experiment PREX Outline Motivation Parity Violation at JLab

More information

PRECISE electron-beam polarimetry will become increasingly

PRECISE electron-beam polarimetry will become increasingly IEEE TRANSACTIONS ON NUCLEAR SCIENCE, VOL. 51, NO. 4, AUGUST 2004 1533 Møller Polarimetry With Atomic Hydrogen Targets Eugene Chudakov and Vladimir Luppov Abstract A novel proposal of using polarized atomic

More information

Status of the PREX Experiment R n through PVeS at JLab

Status of the PREX Experiment R n through PVeS at JLab Status of the PREX Experiment R n through PVeS at JLab Seamus Riordan University of Massachusetts, Amherst sriordan@physics.umass.edu for the PREX Collaboration June 18, 2011 Seamus Riordan NuSym11 PREX

More information

Development of Soft X-rayX using Laser Compton Scattering

Development of Soft X-rayX using Laser Compton Scattering 26 th Advanced ICFA Beam Dynamics Workshop on Nanometre-Size Colliding Beams September 2-6, 2002 at Lausanne Development of Soft X-rayX Source using Laser Compton Scattering R. Kuroda*, S. Kashiwagi*,

More information

MOLLER Experiment. Many slides courtesy of K. Kumar, K. Paschke, J. Mammei, M. Dalton, etc.

MOLLER Experiment. Many slides courtesy of K. Kumar, K. Paschke, J. Mammei, M. Dalton, etc. MOLLER Experiment D.S. Armstrong Nov. 9 2010 Precision Tests of the Standard Model ECT* Workshop Moller scattering: intro Previous measurement: SLAC E158 MOLLER: new physics reach Experimental Concept

More information

Full-Acceptance Detector Integration at MEIC

Full-Acceptance Detector Integration at MEIC Full-Acceptance Detector Integration at MEIC Vasiliy Morozov for MEIC Study Group Electron Ion Collider Users Meeting, Stony Brook University June 27, 2014 Lattice design of geometrically-matched collider

More information

Parity-Violating Measurements of the Weak Charge of. Pb (PREX) & Ca (CREX) . and possible future measurements. R. Michaels, ICNT / MSU, Aug /26

Parity-Violating Measurements of the Weak Charge of. Pb (PREX) & Ca (CREX) . and possible future measurements. R. Michaels, ICNT / MSU, Aug /26 Parity-Violating Measurements of the Weak Charge of 208 Pb (PREX) & 48 Ca (CREX) 208 Pb 48 Ca. and possible future measurements R. Michaels, ICNT / MSU, Aug 2013 1/26 Hall A at Jefferson Lab Hall A High

More information

Upstream Polarimetry with 4-Magnet Chicane

Upstream Polarimetry with 4-Magnet Chicane Vahagn Gharibyan,, Peter Schuler Introduction & Overview O Compton polarimetry basics I, II, III O laser parameters O Tesla design & chicane design 4-Magnet Chicane O general layout & properties O movable

More information

K + Physics at J-PARC

K + Physics at J-PARC Takeshi K. Komatsubara (KEK-IPNS) 1 K + Physics at J-PARC K + Physics at J-PARC Takeshi K. Komatsubara (KEK-IPNS) 2005.May.26 K - RARE Meeting at INFN, Frascati Takeshi K. Komatsubara (KEK-IPNS) 2 K +

More information

ERL FACILITY AT CERN FOR APPLICATIONS

ERL FACILITY AT CERN FOR APPLICATIONS ERL FACILITY AT CERN FOR APPLICATIONS Erk Jensen (CERN) Big thanks to contributors: A. Bogacz (JLAB), O. Brüning, R. Calaga, V. Chetvertkova, E. Cormier (CELIA), R. Jones, M. Klein, A. Valloni, D. Pellegrini,

More information

Introduction Polarimeters at MAMI Analysis Future Conclusion. Polarimetry at MAMI. V. Tyukin, Inst. of Nuclear Physics, Mainz, Germany

Introduction Polarimeters at MAMI Analysis Future Conclusion. Polarimetry at MAMI. V. Tyukin, Inst. of Nuclear Physics, Mainz, Germany Polarimetry at MAMI V. Tyukin, Inst. of Nuclear Physics, Mainz, Germany Workshop to Explore Physics Opportunities with Intense, Polarized Electron Beams up to 3 MeV MIT 213 15 March 213 Contents Introduction

More information

Low-Energy Accelerators for High Precision Measurements Sebastian Baunack

Low-Energy Accelerators for High Precision Measurements Sebastian Baunack Low-Energy Accelerators for High Precision Measurements Sebastian Baunack Johannes Gutenberg-Universität Mainz EINN 2017, Oct. 31 - Nov 4, 2017 Paphos, Cyprus 1 Outline New type of accelerators: ERL High

More information

The TESLA Dogbone Damping Ring

The TESLA Dogbone Damping Ring The TESLA Dogbone Damping Ring Winfried Decking for the TESLA Collaboration April 6 th 2004 Outline The Dogbone Issues: Kicker Design Dynamic Aperture Emittance Dilution due to Stray-Fields Collective

More information

Precision electron polarimetry

Precision electron polarimetry Precision electron polarimetry E. Chudakov 1 Jefferson Lab 12000 Jefferson Ave, STE 16, Newport News, VA 23606 USA Abstract. A new generation of precise Parity-Violating experiments will require a sub-percent

More information

The E166 Experiment: Undulator-Based Production of Polarized Positrons

The E166 Experiment: Undulator-Based Production of Polarized Positrons The E166 Experiment: Undulator-Based Production of Polarized Positrons Hermann Kolanoski (Humboldt-Universität Berlin) for the E166 Collaboration ILC: - physics with polarised e + e - - undulator source

More information

Positron program at the Idaho Accelerator Center. Giulio Stancari Idaho State University and Jefferson Lab

Positron program at the Idaho Accelerator Center. Giulio Stancari Idaho State University and Jefferson Lab Positron program at the Idaho Accelerator Center Giulio Stancari Idaho State University and Jefferson Lab International Workshop on Positrons at Jefferson Lab Newport News, Virginia (USA), 26 March 2009

More information

PREX and CREX. R N from Electroweak Asymmetry in Elastic Electron-Nucleus Scattering. Neutron Skin.

PREX and CREX.   R N from Electroweak Asymmetry in Elastic Electron-Nucleus Scattering. Neutron Skin. http://hallaweb.jlab.org/parity/prex PREX and CREX 08 Pb Horowitz 48 Ca Neutron Skin R N from Electroweak Asymmetry in Elastic Electron-Nucleus Scattering R L 4 6 A ~ 10 PV Q ~ 10 R L PRL 108 (01) 1150

More information

New and accelerator research facility, using MW-class high power proton beams at both 3 GeV and 30 GeV. J-PARC Tokai KEK Tsukuba LINAC 400 MeV Rapid Cycle Synchrotron Energy : 3 GeV Repetition : 25 Hz

More information

ASYMMETRIES, USING ACCUMULATORS*

ASYMMETRIES, USING ACCUMULATORS* 1 ASYMMETRIES, USING ACCUMULATORS* *AND OTHER METHODS Compton Polarimetry, Spring + Fall 2016 Larisa Thorne (CMU) 17 January 2017 DVCS Collaboration meeting 2 Outline Overview: Compton Scattering Experimental

More information

Unique electron polarimeter analyzing power comparison and precision spin-based energy measurement

Unique electron polarimeter analyzing power comparison and precision spin-based energy measurement PHYSICAL REVIEW SPECIAL TOPICS - ACCELERATORS AND BEAMS, VOLUME 7, 042802 (2004) Unique electron polarimeter analyzing power comparison and precision spin-based energy measurement J. M. Grames,* C. K.

More information

Measurement of the Proton Beam Polarization with Ultra Thin Carbon Targets at RHIC

Measurement of the Proton Beam Polarization with Ultra Thin Carbon Targets at RHIC 1of23 Measurement of the Proton Beam Polarization with Ultra Thin Carbon Targets at RHIC Brookhaven National Laboratory for the RHIC Polarimetry Group Sep 12, 2013 Relativistic Heavy Ion Collider world

More information

Low energy Positron Polarimetry at the ILC

Low energy Positron Polarimetry at the ILC Low energy Positron Polarimetry at the ILC Gideon Alexander, Ralph Dollan, Thomas Lohse, Sabine Riemann, Andreas Schälicke, Peter Schüler, Pavel Starovoitov, Andriy Ushakov January 23, 29 Abstract For

More information

High Energy Photons at HI S

High Energy Photons at HI S High Energy Photons at HIS Rob Pywell High Intensity Gamma Source Duke University Thanks to Dr. Ying Wu, Duke University, for supplying some of the information in this talk. Precision Photo-Reaction Measurements

More information

Measurement of Nucleon Strange Form Factors at High Q 2

Measurement of Nucleon Strange Form Factors at High Q 2 Measurement of Nucleon Strange Form Factors at High Q 2 (HAPPEX III Collaboration) Rupesh Silwal 22 March, 2011 At very low Q2, GsE/M relates to the strange matrix elements of the nucleon (strange radius

More information

ThomX Machine Advisory Committee. (LAL Orsay, March ) Ring Beam Dynamics

ThomX Machine Advisory Committee. (LAL Orsay, March ) Ring Beam Dynamics ThomX Machine Advisory Committee (LAL Orsay, March 20-21 2017) Ring Beam Dynamics A. Loulergue, M. Biagini, C. Bruni, I. Chaikovska I. Debrot, N. Delerue, A. Gamelin, H. Guler, J. Zang Programme Investissements

More information

ELIC Design. Center for Advanced Studies of Accelerators. Jefferson Lab. Second Electron-Ion Collider Workshop Jefferson Lab March 15-17, 2004

ELIC Design. Center for Advanced Studies of Accelerators. Jefferson Lab. Second Electron-Ion Collider Workshop Jefferson Lab March 15-17, 2004 ELIC Design Ya. Derbenev, K. Beard, S. Chattopadhyay, J. Delayen, J. Grames, A. Hutton, G. Krafft, R. Li, L. Merminga, M. Poelker, E. Pozdeyev, B. Yunn, Y. Zhang Center for Advanced Studies of Accelerators

More information

12 GeV CEBAF Beam Parameter Tables

12 GeV CEBAF Beam Parameter Tables 12 GeV CEBAF Beam Parameter Tables Jay Benesch, Alex Bogacz, Arne Freyberger, Yves Roblin, Todd Satogata, Riad Suleiman and Michael Tiefenback Thomas Jefferson National Accelerator Facility 12000 Jefferson

More information

ATHENA / AD-1. First production and detection of cold antihydrogen atoms. ATHENA Collaboration. Rolf Landua CERN

ATHENA / AD-1. First production and detection of cold antihydrogen atoms. ATHENA Collaboration. Rolf Landua CERN ATHENA / AD-1 First production and detection of cold antihydrogen atoms ATHENA Collaboration Rolf Landua CERN 1 LONG TERM PHYSICS GOALS Antihydrogen = Hydrogen? CPT Gravity But... 2 FIRST GOAL PRODUCTION

More information

Sta$s$cs, Systema$cs and Run Phases

Sta$s$cs, Systema$cs and Run Phases Sta$s$cs, Systema$cs and Run Phases DOE Nuclear Physics MOLLER Science Review UMass, Amherst! September, 2014 Kent Paschke University of Virginia α Rates, Noise Budget, and Sta$s$cal Precision 0.4 0.35

More information

Large Acceptance High Luminosity Detector at 12 GeV

Large Acceptance High Luminosity Detector at 12 GeV Outline Large Acceptance High Luminosity Detector at 12 GeV E.Chudakov 1 1 Hall A, JLab For June 2006 Hall A Meeting Outline Outline 1 Motivation for a Large Acceptance at High Luminosity DIS Parity Violation

More information

Linear Collider Beam Instrumentation Overview

Linear Collider Beam Instrumentation Overview Linear Collider Beam Instrumentation Overview Linear Collider R&D Opportunities Workshop May 31 st, 2002 SLAC Eric Torrence* University of Oregon *with M.Woods and D.Cinabro BI Overview Beam Energy Polarization

More information

Advanced injector possible specs. Jay Benesch 10 Sept 2015

Advanced injector possible specs. Jay Benesch 10 Sept 2015 Advanced injector possible specs Jay Benesch 10 Sept 2015 Physics requirements Parity violating electron scattering (PVES) experiments will be running the majority of the time in hall A The most stringent

More information

HERA II Physics. Both ZEUS & H1 have made major upgrades in order to utilise the increase in HERA luminosity to the full.

HERA II Physics. Both ZEUS & H1 have made major upgrades in order to utilise the increase in HERA luminosity to the full. HERA II Physics Both ZEUS & H1 have made major upgrades in order to utilise the increase in HERA luminosity to the full. 1 HERA II Physics The upgrades concentrate mainly on the following areas: - Vertex

More information

C-REX : Parity-Violating Measurement of the Weak Charge of

C-REX : Parity-Violating Measurement of the Weak Charge of C-REX : Parity-Violating Measurement of the Weak Charge of 48 Ca to an accuracy of 0.02 fm Spokespersons: Juliette Mammei Dustin McNulty Robert Michaels that s me Kent Paschke Seamus Riordan (contact person)

More information

DESIGN AND CONSTRUCTION OF LOW ENERGY ELECTRON ACCELERATORS AT SINP MSU

DESIGN AND CONSTRUCTION OF LOW ENERGY ELECTRON ACCELERATORS AT SINP MSU DESIGN AND CONSTRUCTION OF LOW ENERGY ELECTRON ACCELERATORS AT SINP MSU V. Shvedunov Skobeltsyn Institute of Nuclear Physics Lomonosov Moscow State University 26 November 2013 Betatron 1959-1985 Low intensity

More information

Proton Radius Puzzle and the PRad Experiment at JLab

Proton Radius Puzzle and the PRad Experiment at JLab Proton Radius Puzzle and the PRad Experiment at JLab NC A&T State University, NC USA for the PRad collaboration Spokespersons:, H. Gao, M. Khandaker, D. Dutta Outline The Proton Radius Puzzle Recent status

More information

Update on Development of High Current Bunched Electron Beam from Magnetized DC Photogun

Update on Development of High Current Bunched Electron Beam from Magnetized DC Photogun Update on Development of High Current Bunched Electron Beam from Magnetized DC Photogun JLEIC Collaboration Meeting October 6, 2016 Riad Suleiman and Matt Poelker Magnetized Cooling JLEIC bunched magnetized

More information

Spin Feedback System at COSY

Spin Feedback System at COSY Spin Feedback System at COSY 21.7.2016 Nils Hempelmann Outline Electric Dipole Moments Spin Manipulation Feedback System Validation Using Vertical Spin Build-Up Wien Filter Method 21.7.2016 Nils Hempelmann

More information

PRECISION MØLLER POLARIMETRY AND APPLICATIONS AT JEFFERSON LABORATORY

PRECISION MØLLER POLARIMETRY AND APPLICATIONS AT JEFFERSON LABORATORY PRECISION MØLLER POLARIMETRY AND APPLICATIONS AT JEFFERSON LABORATORY A Dissertation Submitted to the Temple University Graduate Board In Partial Fulfillment of the Requirements for the Degree DOCTOR OF

More information

Positron-proton to electron-proton elastic cross section ratios from CLAS: Systematic uncertainties and Implications of the results

Positron-proton to electron-proton elastic cross section ratios from CLAS: Systematic uncertainties and Implications of the results Positron-proton to electron-proton elastic cross section ratios from CLAS: Systematic uncertainties and Implications of the results Dasuni Adikaram Old Dominion University Dipak Rimal, Larry Weinstein,

More information

The P2 Experiment at MESA

The P2 Experiment at MESA The P2 Experiment at MESA Sebastian Baunack Johannes utenberg-universität Mainz Intense Electron Beams Workshop June 17-19, 2015 Cornell University External target experiments: Challenges and opportunities

More information

HIGS - A High-intensity, Mono-energetic, and Tunable Source of Polarized Gamma-rays

HIGS - A High-intensity, Mono-energetic, and Tunable Source of Polarized Gamma-rays HIGS - A High-intensity, Mono-energetic, and Tunable Source of Polarized Gamma-rays Duke FEL Laboratory Triangle Universities Nuclear Laboratory, Duke University May 25, 2010 Acknowledgment: M. Busch,

More information

A Project to convert TLS Booster to hadron accelerator 1. Basic design. 2. The injection systems:

A Project to convert TLS Booster to hadron accelerator 1. Basic design. 2. The injection systems: A Project to convert TLS Booster to hadron accelerator 1. Basic design TLS is made of a 50 MeV electron linac, a booster from 50 MeV to 1.5 GeV, and a storage ring. The TLS storage ring is currently operating

More information

Coherent THz Pulses: Source and Science at the NSLS

Coherent THz Pulses: Source and Science at the NSLS Coherent THz Pulses: Source and Science at the NSLS H. Loos, B. Sheehy, D. Arena, J.B. Murphy, X.-J. Wang and G. L. Carr Brookhaven National Laboratory carr@bnl.gov http://www.nsls.bnl.gov http://infrared.nsls.bnl.gov

More information

E166: Polarized Positrons & Polarimetry

E166: Polarized Positrons & Polarimetry (DESY) - on behalf of the E166 Collaboration ILC: - why polarized positrons - e+ source options - undulator source scheme E166 - proof-of-principle demonstration of the undulator method - undulator basics

More information

Upstream Polarimetry with 4-Magnet Chicane

Upstream Polarimetry with 4-Magnet Chicane 2005 International Linear Collider Workshop Stanford, U.S.A. Upstream Polarimetry with 4-Magnet Chicane N. Meyners, V. Gharibyan, K.P. Schüler DESY, Hamburg, Germany We have extended an earlier polarimeter

More information

P.M. King Ohio University for the MOLLER Collaboration

P.M. King Ohio University for the MOLLER Collaboration Parity violating electron scattering at JLab: the MOLLER experiment P.M. King Ohio University for the MOLLER Collaboration SESAPS, 10 November 2016; University of Virginia, Charlottesville, VA The Standard

More information

A Polarized Positron Source for CEBAF

A Polarized Positron Source for CEBAF A Polarized Positron Source for CEBAF J. Dumas a,b, J. Grames b, E. Voutier a a Laboratoire de Physique Subatomique et de Cosmologie IN2P3/CNRS Université Joseph Fourier - INP 53, rue des Martyrs, 38026

More information

Beam Instrumentation Challenges for Parity-Violation Experiments

Beam Instrumentation Challenges for Parity-Violation Experiments Beam Instrumentation Challenges for Parity-Violation Experiments Manolis Kargiantoulakis Intense Electron Beams Workshop 2015 Cornell University Many thanks to Mark Pitt, Kent Paschke, Mark Dalton, for

More information

New Electron Source for Energy Recovery Linacs

New Electron Source for Energy Recovery Linacs New Electron Source for Energy Recovery Linacs Ivan Bazarov 20m Cornell s photoinjector: world s brightest electron source 1 Outline Uses of high brightness electron beams Physics of brightness High brightness

More information

Pushing the limits of laser synchrotron light sources

Pushing the limits of laser synchrotron light sources Pushing the limits of laser synchrotron light sources Igor Pogorelsky National Synchrotron Light Source 2 Synchrotron light source With λ w ~ several centimeters, attaining XUV region requires electron

More information

PIP-II Injector Test s Low Energy Beam Transport: Commissioning and Selected Measurements

PIP-II Injector Test s Low Energy Beam Transport: Commissioning and Selected Measurements PIP-II Injector Test s Low Energy Beam Transport: Commissioning and Selected Measurements A. Shemyakin 1, M. Alvarez 1, R. Andrews 1, J.-P. Carneiro 1, A. Chen 1, R. D Arcy 2, B. Hanna 1, L. Prost 1, V.

More information

2. THE HIGS FACILITY 2.1 The Free-Electron Laser Source

2. THE HIGS FACILITY 2.1 The Free-Electron Laser Source 2. THE HIGS FACILITY 2.1 The Free-Electron Laser Source In recent years the development of intense, short-wavelength storage ring FELs has created an opportunity for the development of intense high-energy

More information

Development status of the positron lifetime beam MePS and the first lifetime measurements of porous ultra-low-k dielectrics with MePS

Development status of the positron lifetime beam MePS and the first lifetime measurements of porous ultra-low-k dielectrics with MePS Development status of the positron lifetime beam MePS and the first lifetime measurements of porous ultra-low-k dielectrics with MePS Institut für Physik, Martin-Luther-Universität Halle-Wittenberg Table

More information

Parity-violating Electron Scattering and Strangeness in the Nucleon: Results from HAPPEX-II

Parity-violating Electron Scattering and Strangeness in the Nucleon: Results from HAPPEX-II Parity-violating Electron Scattering and Strangeness in the Nucleon: Results from HAPPEX-II L. J. Kaufman University of Massachusetts The HAPPEX Collaboration Thomas Jefferson National Accelerator Facility

More information

positron source EPOS - general concept - timing system - digital lifetime measurement

positron source EPOS - general concept - timing system - digital lifetime measurement The pulsed high-brightness positron source EPOS R. Krause-Rehberg 1, G. Brauer 2, A. Krille 1, M. Jungmann 1, S. Sachert 1, A. Rogov 2, K. Nowak 2 1 Martin-Luther-University Halle, Germany 2 Research Center

More information

Simulation for Proton Charge Radius (PRad) Experiment at Jefferson Lab1 Li Ye Mississippi State University For the PRad Collaboration The Proton Charg

Simulation for Proton Charge Radius (PRad) Experiment at Jefferson Lab1 Li Ye Mississippi State University For the PRad Collaboration The Proton Charg Simulation for Proton Charge Radius (PRad) Experiment at Jefferson Lab1 Li Ye Mississippi State University For the PRad Collaboration The Proton Charge Radius Puzzle refers to 7 σ discrepancy between the

More information

EUROPEAN ORGANIZATION FOR NUCLEAR RESEARCH CERN - SL DIVISION. Multi-TeV CLIC Photon Collider Option. H. Burkhardt

EUROPEAN ORGANIZATION FOR NUCLEAR RESEARCH CERN - SL DIVISION. Multi-TeV CLIC Photon Collider Option. H. Burkhardt EUROPEAN ORGANIZATION FOR NUCLEAR RESEARCH CERN - SL DIVISION CERN-SL-2000-070 CLIC Note 463 AP Multi-TeV CLIC Photon Collider Option H. Burkhardt Considerations for an option of γγ collisions at multi-tev

More information

Spin Filtering at COSY - First Results

Spin Filtering at COSY - First Results Mitglied der Helmholtz-Gemeinschaft Spin Filtering at COSY - First Results Dieter Oellers University of Ferrara, INFN Ferrara STORI11, Frascati PAX-Collaboration Goal: Produce a beam of polarized antiprotons

More information

The π 0 Lifetime Experiment and Future Plans at JLab

The π 0 Lifetime Experiment and Future Plans at JLab The π 0 Lifetime Experiment and Future Plans at JLab North Carolina A&T State University, Greensboro, NC, USA (for the PrimEx Collaboration at JLab) Outline The PrimEx Experiment at JLab: Physics Motivation

More information

Physics Requirements and Solenoid Description

Physics Requirements and Solenoid Description E.Chudakov Solenoid Review, Oct 2010 Physics Requirements and Description 1 Physics Requirements and Solenoid Description E.Chudakov 1 1 JLab Solenoid Director s Review, JLab, Oct 2010 E.Chudakov Solenoid

More information

Dark Current at Injector. Jang-Hui Han 27 November 2006 XFEL Beam Dynamics Meeting

Dark Current at Injector. Jang-Hui Han 27 November 2006 XFEL Beam Dynamics Meeting Dark Current at Injector Jang-Hui Han 27 November 2006 XFEL Beam Dynamics Meeting Considerations for the guns Ultra-low slice emittance of electron beams higher gradient at the gun cavity solenoid field

More information

Spin Physics in Jefferson Lab s Hall C

Spin Physics in Jefferson Lab s Hall C Spin Physics in Jefferson Lab s Hall C Frank R. Wesselmann Norfolk State University Outline Introduction Jefferson Lab, Hall C Concepts & Definitions Experiments & Measurements Spin as Goal Spin as Tool

More information

IHEP-BINP CEPC accelerator collaboration workshop Beam energy calibration without polarization

IHEP-BINP CEPC accelerator collaboration workshop Beam energy calibration without polarization IHEP-BINP CEPC accelerator collaboration workshop Beam energy calibration without polarization Nickolai Muchnoi Budker INP, Novosibirsk January 12, 2016 Nickolai Muchnoi IHEP-BINP CEPC workshop January

More information

LHC Status and CERN s future plans. Lyn Evans

LHC Status and CERN s future plans. Lyn Evans LHC Status and CERN s future plans Lyn Evans Machine layout L. Evans EDMS document no. 859415 2 Cryodipole overview 1250 1000 Equivalent dipoles 750 500 250 0 01-Jan-01 01-Jan-02 01-Jan-03 01-Jan-04 01-Jan-05

More information