Polarized positrons with the E-166 Experiment
|
|
- Dominick Patrick
- 5 years ago
- Views:
Transcription
1 Polarized positrons with the E-166 Experiment Ralph Dollan Humboldt University, Berlin On behalf of the E-166 collaboration
2 Outline The goal of E-166 The helical undulator Photon transmission polarimetry The E-166 setup Data taking First results on photon and positron asymmetries 15/11/05 R. Dollan 2
3 E-166 Demonstration experiment to proof the possibility, to produce polarized positrons using a helical undulator Collaboration of >50 people from 17 Institutions from 3 continents In the final focus test beam (FFTB) at SLAC with ~50 GeV (unpolarized) electrons 1 m long helical undulator produces circular polarized photons Conversion of photons to positrons in thin W-target Measurement of polarization of photons and positrons by Photon transmission method 15/11/05 R. Dollan 3
4 E-166 Demonstration experiment to proof the possibility, to produce polarized positrons using a helical undulator Collaboration of >50 people from 3 continents In the final focus test beam (FFTB) at SLAC with ~50 GeV (unpolarized) electrons 1 m long helical undulator produces circular polarized photons Conversion of photons to positrons in thin W-target Measurement of polarization of photons and positrons by Photon transmission method ~50 GeV e - Undulator D1 1 m Energy spectrum e - Target e - Dump D2 e - D3 e - Dump γ e + Gamma polarimetry Positron polarimetry 15/11/05 R. Dollan 4
5 Helical winding where I 1 and I 2 are in opposite directions. I 1 I 1 = - I 2 The helical undulator Undulator photons I 2 I 1 z I 2 x e- beam y Helical winding: z component of the induced magnetic field cancels remaining magnetic field describes a helical profile 15/11/05 R. Dollan 5
6 Undulator parameters r u wound left handed λ u Parameter Period λ u On axis field Value 2.4mm 0.76 T K factor 0.17 E 0 =ωh (Energy cut-off 1 st harmonic) Feeding current Rate Heating/pulse r u Undulator aperture 9.6 MeV (50GeV e- beam) ~ 2 ka up to 30 Hz ~3 degc 0.88 mm K - factor (Undulator strength) K E 0 = eh λ u 93.4 H [ T ] λ [ m ] 2 u 2πmc The average photon polarization depends on the angular photon selection (K factor) and also on the quality of the photon collimation (before the conversion target). First harmonic Energy cut-off 2 hc λ γ 2 u Photon intensity - inverse proportional to the undulator aperture. 15/11/05 R. Dollan 6
7 Photon Energy and Polarization 1 st Harmonic 2 nd Harmonic 1 st Harmonic 2 nd Harmonic Undulator Photon energy spectrum Undulator Photon degree of polarization 15/11/05 R. Dollan 7
8 The Positron production target 0.5 X0 W (Tungsten) -> E166 X0 W (Tungsten) = 3.5 mm Polarized γ beam From the Helical Undulator e+ e+ e- e- e- e+ e- e+ Polarization transfer in e+ e- pair creation Energy spectrum Positron Polarization profile created by the undulator photons (creation point) e+ Energy distribution (in and out the 0.5 X0 W target) 15/11/05 R. Dollan 8
9 Production efficiency Escape length d 10 e+ Absorbed: W e+ Absorbed: Ti N e +/N γ [%] 1 e+ produced: W e+ produced: Ti 0,0 0,1 0,2 0,3 0,4 0,5 0,6 0,7 0,8 0,9 1,0 1,1 Target Thickness [X0] Positron production efficiency (positron yield) N (e+) / N (gamma) e+, z distribution (in the W target) For different target thickness 15/11/05 R. Dollan 9
10 Expected Polarization Expected positron polarization vs. positron energy 15/11/05 R. Dollan 10
11 Photon transmission polarimetry Transmission: T ( L) = e nl ( σ phot+ σ pair+ σcomp0 ) ± nlpγ Pe σ pol e Y Analyzing magnet γ B Analyzing magnet Y γ B Sig(+) counter Sig(-) counter Asymmetry: δ ( L) T T + T + T = + nlp e P σ By knowing Pe => Pγ can be calculated: P γ δ = nlσ Asym pol = P e δ = A P γ e γ Pol E166 measures Sig( ) Sig( + ) Sig( ) + Sig( + ) 15/11/05 R. Dollan 11
12 Positron Analyzing Power Positron Energy E e + (MeV) Positron Polarisation P e+ (%) Positron Asymmetry δ (%) Analyzing Power A e+ (%) Expected asymmetries and analyzing power versus positron energy G3 simulation based on the experimental setup of the proposal V. Gharibyan Most challenging task for E166 was to measure asymmetries 1% in the CsI - Calorimeter 15/11/05 R. Dollan 12
13 Measure the asymmetries Positron Polarimetry is similar to the photon Polarimetry. In a reconversion target the positrons are reconverted via Bremsstahlung and anihilation into photons. Reconversion target Analyzing magnet counter e+ γ B Asym = Sig( ) Sig( ) + Sig( + ) Sig( + ) The asymmetry is measured by flipping the magnet polarity. 15/11/05 R. Dollan 13
14 E-166 in the FFTB running parameters: beam energy: 46.6 GeV rep. Rate: 10 Hz N e- /pulse: ~ /11/05 R. Dollan 14
15 TOP VIEW Gamma Analyzing magnet E166 setup in the FFTB e+ Analyzing magnet helical undulator Gamma Table Positron Table collimators photons diag SIDE VIEW Positrons diag photons collimation ~30 m Polarized photons production Gamma Table Positron Table Undulator e- beam Dump magnets 15/11/05 R. Dollan 15
16 E166 setup in the FFTB Undulator table Bending magnets Positron table Gamma table 15/11/05 R. Dollan 16
17 The spectrometer Polarized Photons Undulator Conversion target Polarized Photons SiW Calorimeter Analyzing magnet K. Laihem Vacuum chamber e+ e+ e+ ReConversion target Analyzing magnet Solenoid e+ e+ CsI Conversion target R. Poeschl 15/11/05 R. Dollan 17
18 Pulse Generator The Undulator setup Cooling system Undulator 15/11/05 R. Dollan 18
19 Setup Bending Magnets Solenoid Analyzing Magnet Helical Undulator 15/11/05 R. Dollan 19
20 Setup 15/11/05 R. Dollan 20
21 The CsI-Calorimeter Calorimeter 3x3 CsI crystals in a brass housing 15/11/05 R. Dollan 21
22 The CsI-Calorimeter Calorimeter Photo diodes every crystal is read out by 2 Si-PM s we are reading analog signals 15/11/05 R. Dollan 22
23 Data taking Original plan: two running periods in October 2004 and January 2005 Accident at SLAC -> delay June 2005: first run of E-166 September 2005: second run 15/11/05 R. Dollan 23
24 Data taking Original plan: two running periods in October 2004 and January 2005 Accident at SLAC -> delay June 2005: first run of E-166 September 2005: second run Data taking scheme: Beam energy 46.6 GeV 10 Hz beam Undulator at 10 Hz Every 2 nd pulse undulator off time -> undulator on -event followed by undulator off -event 15/11/05 R. Dollan 24
25 Data taking Signal : Undulator on/off No beam 15/11/05 R. Dollan 25
26 Collected positron data Spectrometer set for No. of beam pulses collected 5.6 MeV 2.0 * MeV 3.1 * MeV 1.2 * MeV 1.2 * MeV 1.2 * MeV 1.0 *10 6 Combined June- and September run 15/11/05 R. Dollan 26
27 How we obtain the asymmetries substract backgroundfrom signalevents average over certain bg-range test statistical methods with toy-monte carlo calculate the asymmetry between the two magnetization states 15/11/05 R. Dollan 27
28 The signals The signals after substracting the background for different methods A. Schälicke 15/11/05 R. Dollan 28
29 Photon Asymmetries preliminary Photon asymmetries from June data measured with 2 Detectors: W. Bugg Photon Calorimeter : 3.52 % ± 0.15 % Aerogel Counter : 3.50 % ± 0.40 % (stat. errors only) 15/11/05 R. Dollan 29
30 Photon Asymmetries preliminary Photon asymmetries from June data measured with 2 Detectors: W. Bugg Photon Calorimeter : 3.52 % ± 0.15 % Aerogel Counter : 3.50 % ± 0.40 % (stat. errors only) Expected photon asymmetries for 5 MeV eff. threshold: Beam Energy [GeV] Aerogel AG2 W-Si Cal. GCAL *) (G3 Simulation) *) energy weighted with calorimeter response function V. Gharibyan 15/11/05 R. Dollan 30
31 Positron Asymmetries preliminary Spectrometer Current [A] Positron Energy [MeV] Measured Asymmetry δ (%) Asymmetry error (stat. only) A. Schälicke (stat. errors only) 15/11/05 R. Dollan 31
32 Positron Asymmetries preliminary (stat. errors only) 15/11/05 R. Dollan 32
33 Summary E-166 was running and produced data with good quality The helical undulator was working We did a first analysis of the data and the asymmetries are in the expected range It still takes some time to come up with a number for the photon and positron polarization More simulation work has to be done The data analysis is ongoing 15/11/05 R. Dollan 33
A Test Experiment for a Polarized Positron Source - E-166 at SLAC
A Test Experiment for a Polarized Positron Source - E-166 at SLAC Ralph Dollan Humboldt University, Berlin Outline Why polarized beams at the ILC The goal of E-166 The helical undulator Positron production
More informationThe E166 Experiment: Undulator-Based Production of Polarized Positrons
SLAC-PUB-12933 The E166 Experiment: Undulator-Based Production of Polarized Positrons A. Mikhailichenko b, G. Alexander j, Y. Batygin i, S. Berridge k, V. Bharadwaj i, G. Bower i, W. Bugg k, F.-J. Decker
More informationThe 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 informationUndulator-Based Production of Polarized Positrons. Project Name LCRD Contact Person William Bugg, University of Tennessee
Project Name LCRD 2.37 Undulator-Based Production of Polarized Positrons Progress Report of E-166 at FFTB at Stanford Linear Accelerator Center. University of Tennessee, Knoxville FY 2004 funding 25,000
More informationE166: 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 informationLow 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 informationA Talk presented at Snowmass 2005, August 14, 2005 CBN E-166 STATUS. Snowmass Alexander Mikhailichenko collaboration:
A Talk presented at Snowmass 2005, August 14, 2005 CBN 05-16 E-166 STATUS Snowmass 2005 Alexander Mikhailichenko for E-166 E collaboration: G. Alexander, P. Anthony, V. Bharadwaj, Yu.K. Batygin, T.Behnke,
More informationPolarimetry. 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 informationPolarised Geant4 Applications at the ILC
Polarised Geant4 Applications at the ILC Andreas Schälicke, Karim Laihem 2 and Pavel Starovoitov - DESY Platanenallee 6, 578 Zeuthen - Germany 2- RWTH Aachen - Phys. Inst. IIIB Physikzentrum, 5256 Aachen-
More informationLinear Collider Collaboration Tech Notes
LCC-0107 November 2002 Linear Collider Collaboration Tech Notes Design Studies for Flux and Polarization Measurements of Photons and Positrons for SLAC Proposal E166: An experiment to test polarized positron
More informationLepton 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 informationPrecision 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 informationLITHIUM LENS STUDIES. Cornell LEPP, Ithaca, NY 14853
LITHIUM LENS STUDIES Alexander Mikhailichenko Cornell LEPP, Ithaca, NY 14853 Linear Collider Workshop of Americas ALCPG, September 30, 2009 Albuquerque NM 1 Positrons and Current moving co-directionally
More informationUndulator-Based Production of Polarized Positrons
SLAC-PROPOSAL-E-166(bis) Revision Date: May 16, 2003 Undulator-Based Production of Polarized Positrons A Proposal for the 50-GeV Beam in the FFTB Gideon Alexander DE,T A, Perry Anthony SL, Vinod K. Bharadwaj
More informationRecoil Polarisation Measurements in Meson Photoproduction
Recoil Polarisation Measurements in Meson Photoproduction Polarisation Observables and Partial Wave Analysis Bad Honnef 2009 Derek Glazier, D.P. Watts University of Edinburgh Helpful for PWA At least 8
More informationA 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 informationTowards an Undulator Based NLC Positron Source
Towards an Undulator Based NLC Positron Source Tuesday June 26, 2002 LCD Meeting, SLAC R. Pitthan and J. Sheppard Contacts Roger Carr, SSRL Max Cornacchia, SSRL Ralph Nelson, SLAC RP Roman Tatchyn, SSRL
More informationIntroduction 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 informationCORNELL ACTIVITIES FOR ILC
December 2 2005 A Talk on Accelerator Physics Seminar CBN05-21 CORNELL ACTIVITIES FOR ILC Alexander Mikhailichenko LEPP, Ithaca, NY 14853 Abstract. We describe some activities/plans caring out at Cornell
More informationHall 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 informationMeasuring very low emittances using betatron radiation. Nathan Majernik October 19, 2017 FACET-II Science Workshop
Measuring very low emittances using betatron radiation Nathan Majernik October 19, 2017 FACET-II Science Workshop Plasma photocathode injection Trojan horse High and low ionization threshold gases Blowout
More informationHERMES status and future running
HERMES status and future running Benedikt Zihlmann University of Gent on behalf of the collaboration DESY PRC Mai 24 p.1/18 Access to Transversity Single spin azimuthal asymmetries on a transverse polarized
More information5 MeV Mott Polarimeter at Jefferson Lab
5 MeV at Jefferson Lab The George Washington University Hampton University Graduate Studies 2012 Outline 1 Mott Scattering Single Scattering Sherman Function Scattering Asymmetry 2 Mott Schematics Polarization
More informationMagnetic fields of the optical matching devices used in the positron source of the ILC
Magnetic fields of the optical matching devices used in the positron source of the ILC Richard Pausch Dresden University of Technology DESY Summer Students Programme 2010 Supervisors: Andreas Schälicke,
More informationSimulation Studies for a Polarimeter at the International Linear Collider (ILC)
Project Report Summer Student Program 2007 Deutsches Elektronen-Synchrotron (DESY) Hamburg, Germany Simulation Studies for a Polarimeter at the International Linear Collider (ILC) Moritz Beckmann Leibniz
More informationSimulation 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 informationThe 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 informationBaryon Spectroscopy with Polarised Photon Beams at ELSA
Baryon Spectroscopy with Polarised Photon Beams at ELSA Daniel Elsner Physikalisches Institut University of Bonn on behalf of the CBELSA/TAPS collaboration DFG - SFB/TR16 PANIC11 25 July 2011 Daniel Elsner
More informationAIRFLY: Measurement of the Air Fluorescence induced by electrons
AIRFLY: Measurement of the Air Fluorescence induced by electrons Valerio Verzi INFN Sezione di Roma II For the Airfly collaboration 9 th Topical Seminar on Innovative Particle and Radiation Detectors 23-26
More informationInvestigation of K0 + photoproduction with the CBELSA/TAPS experiment
Investigation of K0 + photoproduction with the CBELSA/TAPS experiment T.C. Jude Physikalisches Institut, Universität Bonn On behalf of the CBELSA/TAPS Collaboration Supported by the DFG dsdsdsds Investigation
More informationText. References and Figures from: - Basdevant et al., Fundamentals in Nuclear Physics - Henley et al., Subatomic Physics
Lecture 7 Experimental Nuclear Physics PHYS 741 Text heeger@wisc.edu References and Figures from: - Basdevant et al., Fundamentals in Nuclear Physics - Henley et al., Subatomic Physics 98 Scattering Topics
More informationPost-Target Beamline Design for Proposed FFTB Experiment with Polarized Positrons
LCC-11 December Linear Collider Collaboration Tech Notes Post-Target Beamline Design for Proposed FFTB Experiment with Polarized Positrons Y. K. Batygin and J. C. Sheppard Stanford Linear Accelerator Center
More informationJan. 5, 2006 Development of a Helical Undulator for ILC Positron Source
Jan. 5, 2006 Development of a Helical Undulator for ILC Positron Source Abstract. The long-term goal of this research is the development of a polarized positron source able to satisfy the demands of the
More informationThe 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 informationarxiv: v2 [physics.ins-det] 17 Jun 2014
Preprint typeset in JINST style - HYPER VERSION Compton Backscattering for the Calibration of KEDR Tagging System arxiv:146.244v2 [physics.ins-det] 17 Jun 214 V.V. Kaminskiy a,b, N.Yu. Muchnoi a,c, and
More informationLITHIUM LENS FOR EFFECTIVE CAPTURE OF POSITRONS
CBN 07-5 LITHIUM LENS FOR EFFECTIVE CAPTURE OF POSITRONS Alexander Mikhailichenko Cornell University, LEPP, Ithaca, NY 14853 Positron Source Meeting, Jan30-Feb 007, Beijing Efficiency= N e+ /N gammas Angle
More informationMuSIC- RCNP at Osaka University
Commissioning of new DC muon beam line, MuSIC- RCNP at Osaka University Dai Tomono Research Center for Nuclear Physics (RCNP), Osaka University On behalf of the MuSIC- RCNP collaboration tomono@rcnp.osaka-
More informationThe 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 informationSearch for a Dark Photon: proposal for the experiment at VEPP 3.
Search for a Dark Photon: proposal for the experiment at VEPP 3. I.Rachek, B.Wojtsekhowski, D.Nikolenko IEBWorkshop Cornell University June 18, 015 I.Rachek dark photon at VEPP-3 June 18, 015 1 Latest
More informationThe TIC project: tracking gamma rays with a calorimeter
The TIC project: tracking gamma rays with a calorimeter Nicola Mori INFN sezione di Firenze 5th HERD workshop CERN - 12th October 2017 Future cosmic-ray experiments Requirements for the high-energy frontier:
More informationLetter of Intent to Submit 2 Proposals to Test Production of Polarized Positrons with the SLAC 50 GeV Beam in the FFTB
SLAC-PROPOSAL-E16x Sept. X, 2002 Letter of Intent to Submit 2 Proposals to Test Production of Polarized Positrons with the SLAC 50 GeV Beam in the FFTB Proposal I: Production and Polarimetry of Polarizied
More informationA Summary of Ξ ο Physics at KTEV. Erik J. Ramberg Fermilab 2 December, 2005
A Summary of Ξ ο Physics at KTEV Erik J. Ramberg Fermilab 2 December, 2005 Genesis of an idea It was noticed in the Fermilab neutral kaon experiment E731(1983-1987) that a significant Λ flux was evident
More informationIPBI-TN June 30, 2004
Spray Electron Beam for Tests of Linear Collider Forward Calorimeter Detectors in SLAC End Station A R. Arnold UMass Amherst, Amherst MA 01003 T. Fieguth Stanford Linear Accelerator Center Menlo Park,
More informationOverview 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 informationBIG A Gamma Ray Source at FACET-II
BIG A Gamma Ray Source at FACET-II Laser-Driven Radiation Sources for Nuclear Applications, GWU, December 13-15, 2015 Carsten Hast SLAC Outline FACET-II in a Nutshell BIG: Beams of Intense Gamma-Rays at
More informationGEANT4 Simulation of Pion Detectors for the MOLLER Experiment
GEANT4 Simulation of Pion Detectors for the MOLLER Experiment A thesis submitted in partial fulfillment of the requirement for the degree of Bachelor of Science in Physics from the College of William and
More informationIntroduction 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 informationEXPERIMENTAL INVESTIGATIONS OF SYNCHROTRON RADIATION AT THE ONSET OF THE QUANTUM REGIME
EXPERIMENTAL INVESTIGATIONS OF SYNCHROTRON RADIATION AT THE ONSET OF THE QUANTUM REGIME DEPARTMENT OF PHYSICS AND ASTRONOMY, AARHUS UNIVERSITY MOTIVATION Test of quantum mechanical calculations of synchrotron
More informationDevelopment of a Hard X-Ray Polarimeter for Solar Flares and Gamma-Ray Bursts
Development of a Hard X-Ray Polarimeter for Solar Flares and Gamma-Ray Bursts M.L. McConnell, D.J. Forrest, J. Macri, M. McClish, M. Osgood, J.M. Ryan, W.T. Vestrand and C. Zanes Space Science Center University
More informationNew 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 informationThe Determination of Beam Asymmetry from Double Pion Photoproduction
The Determination of Beam Asymmetry from Double Pion Photoproduction Charles Hanretty Florida State University On behalf of the CLAS Collaboration Funding provided by DOE APS DNP Conference May 2, 2009
More informationStudy of Baryon Form factor and Collins effect at BESIII
Study of Baryon Form factor and Collins effect at BESIII Wenbiao Yan On behalf of BESIII Collaboration INT Program INT-17-3 Hadron imaging at Jefferson Lab and at a future EIC 1 Bird s View of BEPCII &
More informationDark Matter Searches with AMS-02. AMS: Alpha Magnetic Spectrometer
Dark Matter Searches with AMS-02 AMS: Alpha Magnetic Spectrometer 2007/2008 Wim de Boer on behalf of the AMS collaboration University of Karlsruhe July, 20. 2004 COSPAR, Paris, W. de Boer, Univ. Karlsruhe
More informationThe KATRIN experiment
The KATRIN experiment Status and SDS comissioning Philipp Chung-On Ranitzsch for the KATRIN collaboration Insitute for Nuclear Physics, Westfälische Wilhelms-Universität, Münster The KATRIN experiment
More informationCrystal Channeling Radiation and Volume Reflection Experiments at SLAC
Crystal Channeling Radiation and Volume Reflection Experiments at SLAC Robert Noble, Andrei Seryi, Jim Spencer, Gennady Stupakov SLAC National Accelerator Laboratory Talk originally given at 4 th Crystal
More informationStatus of KEK-E391a and Future Prospects on K L π 0 νν at KEK. GeiYoub Lim IPNS, KEK
Status of KEK-E391a and Future Prospects on K L π 0 νν at KEK GeiYoub Lim IPNS, KEK E391a Collaboration Joint Institute for Nuclear Research (Dubna), Russia High Energy Accelerator Research Organization,
More informationPrecise Measurement of the Absolute Yield of Fluorescence Photons in Atmospheric Gases
Precise Measurement of the Absolute Yield of Fluorescence Photons in Atmospheric Gases Paolo Privitera 5th Fluorescence Workshop 7 th Air Fluorescence El Escorial Workshop - Madrid, Spain September 22-24,
More informationPositron 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 informationE. EROGLU, E. PILICER, I. TAPAN Department of Physics, Faculty of Arts and Sciences, Uludag University, Gorukle, Bursa, TURKEY.
BALKAN PHYSICS LETTERS c Bogazici University Press 10 February 2010 BPL, 18, 181010, pp. 73-78 (2010) POSITRON PRODUCTION AND ENERGY DEPOSITION STUDIES WITH FLUKA E. EROGLU, E. PILICER, I. TAPAN Department
More informationThe Large Area Telescope on-board of the Fermi Gamma-Ray Space Telescope Mission
The Large Area Telescope on-board of the Fermi Gamma-Ray Space Telescope Mission 1 Outline Mainly from 2009 ApJ 697 1071 The Pair Conversion Telescope The Large Area Telescope Charged Background and Events
More informationDeuteron from CLAS/EG1B Data. Spin Structure Functions of the OUTLINE. Nevzat Guler (for the CLAS Collaboration) Old Dominion University
Spin Structure Functions of the Deuteron from CLAS/EGB Data Nevzat Guler (for the CLAS Collaboration) Old Dominion University OULINE Formalism Experimental setup Data analysis Results and Conclusion Motivation
More informationCompton suppression spectrometry
Compton suppression spectrometry In gamma ray spectrometry performed with High-purity Germanium detectors (HpGe), the detection of low intensity gamma ray lines is complicated by the presence of Compton
More informationAcceptance Problems of Positron Capture Optics. Klaus Floettmann DESY Daresbury, April 05
Acceptance Problems of Positron Capture Optics Klaus Floettmann DESY Daresbury, April 05 Contents: Basics Capture efficiencies for conventional source and undulator source The capture optics ( ) B z g
More informationAccelerator R&D Opportunities: Sources and Linac. Developing expertise. D. Rubin, Cornell University
Accelerator R&D Opportunities: Sources and Linac D. Rubin, Cornell University Electron and positron sources Requirements Status of R&D Linac Modeling of beam dynamics Development of diagnostic and tuning
More informationBaryon Spectroscopy at ELSA
Baryon Spectroscopy at ELSA R. Beck, University Bonn CBELSA/TAPS-collaboration EuNPC, March 15-20, 2009, Bochum Motivation ELSA accelerator Crystal Barrel experiment Recent Results Summary and Outlook
More informationTools of Particle Physics I Accelerators
Tools of Particle Physics I Accelerators W.S. Graves July, 2011 MIT W.S. Graves July, 2011 1.Introduction to Accelerator Physics 2.Three Big Machines Large Hadron Collider (LHC) International Linear Collider
More informationMeasurement of the e + e - π 0 γ cross section at SND
Measurement of the e + e - π 0 γ cross section at SND L.Kardapoltsev (for SND collaboration) Budker Institute of Nuclear Physics, Novosibirsk state university PhiPsi 2017, Mainz, Germany June 2017 Outline
More informationLinear 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 informationHadron structure with photon and antiproton induced reactions - QCD in the non-perturbative range -
Hadron structure with photon and antiproton induced reactions - QCD in the non-perturbative range - Introduction Present: Photoproduction of Mesons at ELSA and MAMI CB-ELSA/TAPS Experiment Crystal Ball/TAPS
More informationProject P2 - The weak charge of the proton
Institute for Nuclear Physics, University of Mainz E-mail: beckerd@kph.uni-mainz.de K. Gerz, S. Baunack, K. S. Kumar, F. E. Maas The goal of Project P2 is to determine the electroweak mixing angle sin
More informationUpstream 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 informationPoS(KAON09)023. Beam Hole Photon Veto For J-PARC K O TO experiment. Yosuke Maeda Kyoto University
Beam Hole Photon Veto For J-PARC K O TO experiment Kyoto University E-mail: maeda_y@scphys.kyoto-u.ac.jp The Beam Hole Photon Veto counter (BHPV) for the J-PARC K O TO experiment was designed by MC simulation.
More informationModifications of the D33(1700) resonance in the nuclear medium
Modifications of the D33(1700) resonance in the nuclear medium Vahe Sokhoyan Nuclear Photoproduction with GlueX Topical Workshop, April 28-29, 2016 Supported by the Carl-Zeiss-Stiftung Motivation Goal:
More informationStatus 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 informationPADME dump proposal. Mauro Raggi, and V. Kozhuharov. What Next LNF, Frascati, November 11 th 2014
PADME dump proposal Mauro Raggi, and V. Kozhuharov What Next LNF, Frascati, November 11 th 2014 Searching for new physics in dump Dump experiments are able to provide extreme sensitivity to low couplings
More informationOverview of the LEPS facility Recent Results
SPring-8 Masaru Yosoi RCNP, Osaka University Overview of the LEPS facility Recent Results K* 0 Σ + photoproduction with evidence for κ meson exchange New result on Θ + LEPS2 project Characteristics of
More informationSC QUADRUPOLE AND DIPOLE
Feb. 18, 009-Feb. 5, 010 CBN 10-1 SC QUADRUPOLE AND DIPOLE A.Mikhailichenko, Cornell University, LEPP, Ithaca, NY 14853 We are describing an SC quadrupole where the field is created not only by the poles
More informationInformation about the T9 beam line and experimental facilities
Information about the T9 beam line and experimental facilities The incoming proton beam from the PS accelerator impinges on the North target and thus produces the particles for the T9 beam line. The collisions
More informationRecent results at the -meson region from the CMD-3 detector at the VEPP-2000 collider
Recent results at the -meson region from the CMD-3 detector at the VEPP-2000 collider Vyacheslav Ivanov *1, Evgeny Solodov 1, Evgeny Kozyrev 1, and Georgiy Razuvaev 1 1 Budker Institute of Nuclear Physics,
More informationWolfgang Gradl. on behalf of the BABAR collaboration. Tau 2016, Beijing 23 rd September 2016
ISR K u K u π (π ) Wolfgang Gradl on behalf of the collaboration Tau 216, Beijing 23 rd September 216 Motivation γ µ QED is precision physics u l 1 2 (u 2) l testbed for QED experimentally: electron ok
More informationRough Layout and Rate Estimate for Beam Test in SLAC ESA
Rough Layout and Rate Estimate for Beam Test in SLAC ESA IPBI-TN-2004-7 July 13, 2004 of Synchrotron Radiation Detector Prototypes for LC Beam Monitor R. Arnold UMass, Amherst, MA 01003 E. Torrence University
More informationSpin-Filtering Studies at COSY
Mitglied der Helmholtz-Gemeinschaft Spin-Filtering Studies at COSY Proposal and beam request #199 PAX collaboration 6. September 2009 Mikhail Nekipelov Outline Spin-filtering. Polarisation buildup at COSY.
More informationA4 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 informationCosmic Ray Physics with the Alpha Magnetic Spectrometer
Cosmic Ray Physics with the Alpha Magnetic Spectrometer Università di Roma La Sapienza, INFN on behalf of AMS Collaboration Outline Introduction AMS02 Spectrometer Cosmic Rays: origin & propagations: Dominant
More informationDouble polarization measurements with the Crystal Barrel/TAPS experiment at ELSA
Double polarization measurements with the Crystal Barrel/TAPS experiment at ELSA Results for π and η photoproduction Jan Hartmann for the CBELSA/TAPS collaboration HISKP, University of Bonn CB-ELSA 8/5/2
More informationMeasurement of the η mass by the NA48 Experiment
Measurement of the η mass by the NA48 Experiment Rainer Wanke Institut für Physik, Universität Mainz Crystal Ball Meeting Mainz, March 20, 2004 Rainer Wanke, Crystal Ball Meeting, Mainz, March 20, 2004
More informationDETERMINATION OF THE LINEAR POLARIZATION FOR THE HALL-B PHOTON BEAM AT JLAB
DETERMINATION OF THE LINEAR POLARIZATION FOR THE HALL-B PHOTON BEAM AT JLAB Arthur A. Sabintsev For the CLAS Collaboration The George Washington University Washington, DC U.S.A. 1 Background Information
More informationTarget single- and double-spin asymmetries in DVCS off a longitudinal polarised hydrogen target at HERMES
Target single- and double-spin asymmetries in DVCS off a longitudinal polarised hydrogen target at HERMES David Mahon On behalf of the HERMES Collaboration DIS 2010 - Florence, Italy Overview Mahon DIS
More informationPositron-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 informationCross-section Measurements with HRS and Septum
Cross-section Measurements with HRS and Septum Vincent Sulkosky The College of William and Mary Hall A Analysis Workshop January 6 th, 27 Hall A Analysis Workshop p.1/16 Overview of Experiment E97-11 Precise
More informationPoS(TIPP2014)033. Upgrade of MEG Liquid Xenon Calorimeter. Ryu SAWADA. ICEPP, the University of Tokyo
ICEPP, the University of Tokyo E-mail: sawada@icepp.s.u-tokyo.ac.jp The MEG experiment yielded the most stringent upper limit on the branching ratio of the flavorviolating muon decay µ + e + γ. A major
More informationarxiv: v1 [nucl-ex] 15 Apr 2016
arxiv:1604.04602v1 [nucl-ex] 15 Apr 2016 Beam Normal Single Spin Asymmetry Measurements from Q weak Buddhini P. Waidyawansa for the Q weak Collaboration C122, 12000 Jefferson Avenue, Newport News, VA 23602
More informationDelta undulator magnet: concept and project status
Delta undulator magnet: concept and project status Part I: concept and model construction* Alexander Temnykh, CLASSE, Cornell University, Ithaca, New York, USA Part - II: beam test at ATF in BNL + M. Babzien,
More informationPrecision Tests of the Standard Model. Yury Kolomensky UC Berkeley Physics in Collision Boston, June 29, 2004
Precision Tests of the Standard Model Yury Kolomensky UC Berkeley Physics in Collision Boston, June 29, 2004 Motivation Experiments (not covered by previous speakers ) Atomic Parity Violation Neutrino
More informationASYMMETRIES, 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 informationA Precision Measurement of Elastic e+p Beam Normal Single Spin Asymmetry and Other Transverse Spin Measurements from Qweak
A Precision Measurement of Elastic e+p Beam Normal Single Spin Asymmetry and Other Transverse Spin Measurements from Qweak Buddhini P. Waidyawansa For the Qweak Collaboration JLab Users Group Meeting June
More informationThe Mainz Microtron MAMI
The Mainz Microtron MAMI Hans-Jürgen Arends Institut für Kernphysik Johannes Gutenberg-Universität Mainz Race-Track-Mikrotron D E out =z E L i+1 L i L 1 E λ coherence condition: (for lowest possible energy
More informationPoS(Bormio 2013)024. P2 - The weak charge of the proton. D. Becker, K. Gerz. S. Baunack, K. Kumar, F. E. Maas
Institute for Nuclear Physics, University of Mainz E-mail: beckerd@kph.uni-mainz.de, gerz@kph.uni-mainz.de S. Baunack, K. Kumar, F. E. Maas In early 2012, preparations for a new high precision measurement
More informationStrangeness photoproduction at the BGO-OD experiment
Strangeness photoproduction at the BGO-OD experiment Tom Jude On behalf of the BGO-OD Collaboration University of Bonn Supported by the DFG / SFB tr-16 NSTAR 215 Tom Jude (University of Bonn) Strangeness
More informationTouschek polarimeter for beam energy measurement of VEPP-4M collider LNFSS-08 1 / 16
Touschek polarimeter for beam energy measurement of VEPP-4M collider Ivan Nikolaev Budker Institute of Nuclear Physics Novosibirsk, Russia Frascati Spring School Bruno Touschek May 12-16 2008 Touschek
More information