Users Meeting February 21/22, Stephen Wood

Transcription

1 Users Meeting February 21/22, 2014 Stephen Wood

2 Publications in last year Published: E First Determination of the Weak Charge of the Proton ction PRL 110, E Observation of Helium 7 Lambda hypernucleus by the (e,e K + ) Reaction PRL NIM: Bucking Coil Implementation on PMT for active canceling of matnetic field The lead-glass electromagnetic calorimeters for the magnetic spectrometers in Hall C at Jefferson Lab NIM NIM Submitted: F-Pi Separated Response Function Ratios in Exclusive, Forward Electroproduction Drafts: E01-011/E The HKS Experiments at JLab Hall C and the New Spectroscopy of Boron 12 Lambda hypernuclei PhD in 2013: Myriam Johnson, Anusha Liyanage, Rakitha Beminiwattha, Buddhini Waidyawansa

3 6 GeV Publication Status - I Exp # Topic Done Papers Extra Papers Notes E (e,e ) R 10/1999 P Elastic, spin offs E (e,e K) 12/1999 PRL 12/2004 PRC 11/2007 E HNSS 5/2000 PRL 6/2003 PRC 4/2006 Omega production E Nuclear R 7/2000 Proton and Deuteron E GeN (Madey) 4/2001 PRL 9/2003 PRC 2/2006 E93-026B GeN Poltar 12/2001 PRL 1/2004 E RSS 3/2002 PRL 3/2007 PRL 9/2010 E F2N low Q2 5/2003 Draft E Baryon 6/2003 PRC 6/2009 PRC 9/2009 GeP/GmP Draft on Arxiv Needs radiative corrections work

4 6 GeV Publication Status - II Exp # Topic Done Papers Extra Papers Notes E Intermediate Q2 duality 7/2003 PRC 9/2009 Neutron Duality spin off E Fpi II 8/2003 PRL 10/2006 PRCx2 10/2008 E Meson Duality 8/2003 PRL 1/2007 PRB 7/2008 E G0 Forward 5/2004 PRL 8/2005 PRL 8/2007 E X>1 11/2004 PRL 11/2010 PRL X/2012 Separated response function + - ratios submitted PRC 1/12 Target NIM Global Analysis E EMC Effect 11/2004 PRL 11/2009 Drafting Heavy Target E J/Psi 12/2004 PRL 1/2009 E Pi Transpareny 12/2004 PRL 9/2007 PRC 5/2010 Scaling study K Transp 7/11 (from F i-i and F -II) E HKS 11/2005 PRL 1/2013 More to come E Photofission 12/2005 P of Atom 10/2010

5 6 GeV Publication Status - III Exp # Topic Done Papers Extra Papers Notes E Photofission 12/2005 P of Atom 10/2010 G0 Backward 3/2007 PRL 1/2010 NIM F+B 8/11 Trans Asy 7/11 Pi Asy Draft E F2/R Nuclei 7/2007 Drafting E gamma 7/2007 E F2/R Deut. 7/2007 Drafting E GeP 2gamma 1/2008 PRL 3/11 E RCS 1/2008 Student assigned Analyzing physics backgrounds E GeP-III 6/2008 PRL 6/2010 PRL 5/2012 ( 0 ) E SANE 3/2009 Gep Draft E HES/HKS 11/ B draft E Qweak 5/2012 PRL 10/2013 NIM Draft

6 Approved and Conditional 12 GeV Hall C Experiments Number Experiment Grade Approved Days Cond. Days Non-standard Equipment E Pion Form Factor A 52 E SIDIS R A- 40 E x>1 A- 32 E He3 g_2 A- 29 Polarized He3 target E (e,e' ) Exclusive Factorizaton A- 36 E (e,e'k) Exclusive Factorization B+ 40 E SIDIS P_t A- 32 E Charge Symmetry Violation A- 22 E large x B+ 13 E d(e,e'p) B+ 21 E EMC A- 23 E Color Transparency B+ 26 E He3 A1n A 36 Polarized He3 target E He4(e,e'pol(p)) B+ 37 FPP in HMS E Neutron Form Factor B+ 50 Magnet + Neutron polarimeter E EMC d(e,e' backward p) B+ 40 LAD (Hall B TOF bars) E SIDIS Pi0 A- 26 Neutral Partical Spect. E DVCS + Exclusive Pi0 A 53 Neutral Partical Spect. C Deuteron Tensor SF b1 A- 30 Polarized ND Total Days Weeks/year

7 Hall C Timeline Mid 2013 SHMS installation began Spring 2014 SHMS Shield house Magnet Delivery Date Q1 July 2014 Dipole July 2015 Q2, Q3 Sept/Nov o Horizontal Bender Aug 2014 Note: Some assembly required Detector installation after dipole install 2014 Power supply testing Calorimeter and electronics/daq, 2015 Detector installation 2016 SHMS commissioning Commissioning Experiments in Hall C

8 Early running plans Year : Precommissioning detector checkout ~25 PAC days Commissioning Experiment 9 days of E search for color transparency A(e,e p) only easy coincidence measurement E F p,d 2 structure functions at large x Momentum scans help understand acceptance 2 days E EMC Effect Integrate light nuclei with F 2 run, Point target helps acceptance studies. 3 days of E d(e,e p) If time available Push to lower cross sections

9 2017: Early running plan Years 2-3 E P t dependence of basic SIDIS cross sections Push particle ID capabilities of SHMS E Precise + - ratios in SIDIS Charge Symmetry Detector efficiencies E L/T separated p(e,e K + ) factorization test Easiest L/T separation 2018:? E g 2 n measurements at fixed Q 2 First polarized 3 He target experiment in Hall C A 1n, F, GeN?

10 Reorganization: Merger of Hall A & C Physics Staffs Hall A/C Org Chart

11 Hall A/C Reorganization Maintain distinct engineering/design and technician groups, reporting to CK. New spectrometer support group, reporting to SAW J. Segal, J. Beaufait, G. Brown, M. Long Detectors, Electronics, Electrical, High Voltage, Mag Power, Physicists being organized into Teams/Working Groups, based skills/roles/interests, to support operations in both halls. Postdocs generally connected with a specific Hall

12 Teams Keppel Wood Targets Spectrometer Mechanics (sieve slit, NMR, pointing, fringe fields) DAQ/Software/Counting Houses/Computers Spectrometer Optics Polarimetry (other than DAQ) Controls, EPICS, Power supplies Ancillary Detectors (GeN, LAD, NPS) HRS, HMS, SHMS detectors Beamline Hall Documentation Super BigBite Project Web Pages Moller Project

13 Hall C User Group Hall C User Group board: Pete Markowitz (chair) 9/14 Eric Christy 9/14 Nadia Fomin 9/15 (filling remaining term of K. Hafidi) Gabriel Niculescu 9/15 Abdellah Ahmidouch 9/16 Edward Brash 9/16 No suggestion from Lab that Hall C & A user groups should merge. (If desired, users should initiate) CK and SAW suggest Halls have separate user/collaboration meetings as needed, but hold annual joint Physics workshop (e.g. like Hall C Summer Physics Workshop). But users should give their input on this.

14 Detector construction data preservation Wealth of information has been (presumably) generated during the construction of the SHMS detectors. Paper, electronic logbooks Q/A, test information Maps/element locations, serial numbers Spreadsheets Photographs Design reports, proposals Needed for Detector commissioning Data analysis Generation of user manuals, tech reports, NIM papers Information should be archived at JLab. For now: Preserve records Send electronic records to SAW

15 Hall C after 12 GeV Upgrade Beam Energy: 2 11 GeV/c Super High Momentum Spectrometer (SHMS) Horizontal Bender, 3 Quads, Dipole P 11 GeV/c dp/p x10-3 Acceptance: 4msr, 30% 5.5 < < 40 Good e - / - e + / + /K + /p PID High Momentum Spectrometer (HMS) P 7.5 GeV/c dp/p x10-3 Acceptance: 6.5msr, 18% 10.5 < < 90 Good e - / - e + / + /K + /p PID Minimum opening angle: 17 Well shielded detector huts 2 beamline polarimeters Ideal facility for: Rosenbluth (L/T) separations Exclusive reactions Low cross sections (neutrino level) 3 o Horizontal bender

16 12 GeV Hall C Physics Exclusive reactions and form factors Neutron Electric Form Factor d(e,e p) Pion Form Factor Factorization of exclusive p(e,e ), p(e,e K), Kaon FF? Semi-Inclusive Deep Inelastic Scattering p,d(e, e ) Quark transverse momentum distributions Charge symmetry of parton distributions u p (x) = d n (x)? Nucleon Structure Functions Inclusive (e,e ) Unpolarized structure functions, high x Neutron spin-structure functions (polarized 3He) Nuclear Effects Nuclear transparency, A(e,e p), A(e,e ) EMC effect x>1(short Range Correlations, Superfast quarks) 4 He(e,e p) Slide 16

17 Hall C 12 GeV Era Summary Hall C will have two well shielded magnetic spectrometers able to exploit full beam energy, measure low cross sections with precision, L/T separations Approved program of structure functions, SIDIS, exclusive reactions and nuclear effects (EMC, X>1, Transparency) ~2020 Additions to base equipment required to support approved experiments: Neutron and proton polarimeters Backward nucleon detector (Large Acceptance Detector) 0 / detector (Neutral Particle Spectrometer)

18 Notes