Overview of SoLID
Jian-ping Chen, JLab
SoLID Collaboration Meeting
July 9-10, 2014
Outstanding Physics for SoLID
•SoLID: large acceptance, capable of handling high luminosity
(up to~1039 with baffle, up to ~1037 without baffle)
• Ideal for precision Inclusive-DIS (PVDIS) and SIDIS experiments
• Good for certain exclusive reactions
• Five Approved Experiments: 4 “A” rating, 1 “A-” rating
• SIDIS: E12-10-006 T Polarized n (3He), 90 days
•
E12-11-007 L polarized n (3He), 35 days
E12-11-108 T polarized p (NH3), 120 days
(Haiyan’s talk)
•
PVDIS: E12-10-007, LD2/LH2, 169 days,
• Threshold J/y: E12-12-006, LH2, 60 days,
• New Proposals: (to be reviewed tomorrow)
• di-hadron: parasitic to E12-10-006
• A_y:
parasitic to E12-10-006/E12-11-108
• EMC-PVDIS: new beam time 71 days on 48Ca
(Paul’s talk)
(Zein-Eddine’s talk)
SoLID- SIDIS Configuration
EM Calorimeter
(forward angle)
GEM
EM Calorimeter
(large angle)
MRPC
Target
Collmator
CLEO II Coil and Yoke
Light Gas Heavy Gas
Cherenkov Cherenkov
SoLID- PVDIS Configuration
EM Calorimeter
(forward angle)
Cherenkov
GEM
Baffle
Target
GEM
CLEO II Coil and Yoke
SoLID Base Equipment
• Solenoid Magnet: CLEOII magnet with modifications
• EM Calorimeter: particle identification, mainly electron PID
SIDIS forward + Large-angle
PVDIS forward only
• Light Gas Cherenkov: electron PID
• Heavy Gas Cherenkov: hadron (pion) PID, only for SIDIS
• Baffles: reduce background, only for PVDIS
• Data Acquisition: Hall D developed pipeline DAQ system
• Supporting Structure for magnet and detectors
• Infrastructure
• Dependencies:
• GEM detectors: tracking, to be provided by Chinese Collaboration
• MRPC: TOF for hadron (pion) PID, only for SIDIS, detector to be
provided by Chinese Collaboration; readout electronics: joint.
• DAQ: FADC from JLab Physics Division electronics pool
• Magnet: disassembling/transportation, initial refurbishing by JLab
• Beamline: standard instrumentation operational.
Experiment-Specific Dependencies
 Standard or will be available instrumentation:
• SIDIS(n): T/L polarized 3He target, standard/achieved performance
• J/y: LH2 target, standard, modification in configuration
• PVDIS: Compton and Moller polarimeters
required by MOLLOR and PREX
 Equipment needs addition resource:
• PVDIS: custom high-power cryotarget, ESR2 assumed available
(required by MOLLER)
• SIDIS(p): T polarized NH3 target
Technical Requirements and Setup (I)
• 1)Magnet: OD=3m, ID=1m, L> 3m. Bmax>1.35 T, BdL=5 T m.
acceptance: f ~ 2p, q : 8o-24o (SIDIS) / 22o-35o (PVDIS), P: 1-7 GeV
resolution: dp/p ~ 2% (requires 0.1 mm tracking resolution)
fringe field at the front end < 5 Gauss
• 2)GEM: 6 planes (SIDIS), 5 planes (PVDIS), area ~ 37 m2, 165K ch’s,
tracking eff > 90%, radial r resolution 0.1 mm
high rate and high radiation environment
• 3)EM Calorimeter:Shashlyk sampling (leadscintillator/fiber)
calorimeter
1800 preshower(2 RL) and 1800 module shower (18 RL)
module area=100 cm2,
300 scientillator pedal detector (SPD) (5mm) in front.
Resolution ~ 10%/SQRT(E)
p suppression 50:1 with electron eff >90%
5:1 photo suppression
Radiation hard (<20% decreasing in gain after 400KRad)
Trigger rate < 600 KHz (20KHz/sector) (EC+LG Cherenkov)
Technical Requirements and Setup (II)
• 4) Light Gas Cherenkov: SIDIS: 2 m, CO2
PVDIS: 1 m, C4F8O(65%)/N2(35%)
60 mirrors, 270 PMTs, area=20 m2
# photoelectrons > 10, eff(e) > 90%
p suppression > 500:1, for P < 4 GeV (SIDIS) / 3.2 GeV (PVDIS)
works @ field up to 200 G (100 G after m-metal shielding)
• 5) Heavy Gas Cherenkov: 1m, 1.5 atm C4F8O
30 mirrors, 480 PMTs, area=20 m2 (active 8.5 m2)
# photoelectrons > 10, eff(p) > 90%
K suppression > 10:1 for P: 2.5-7.5 GeV
works @ field up to 200 G (100 G after m-metal shielding)
• 6) MRPC: 50 super-modules, each 3 modules, 1650 strips, 3300 ch’s
area=10 m2, time resolustion > 100 ps
K suppression ~ 20:1 for P< 2.5 GeV
photo suppression > 10:1
works at high rate up to 10 KHz/cm2
Trigger Rates for SIDIS
• SIDIS:
DAQ can handle ~ 100 KHz (with event size of 2.6 KB)
Single “electron” trigger (defined by EC+LGC+SPD+MRPC)
rates ~ 160 KHz
Single “p” trigger rates (defined by EC*+SPD+MRPC)
rates ~ 14 MHz
SIDIS physics rates ~ 4 KHz
Accidental coincidence rate ~ 65 KHz (30 ns window)
Total ep coincidence rate ~ 70 KHz
Trigger: 70 KHz (coincidence) + up to 30 KHz for prescaled singles
Progress and Status
• Conceptual design: extensive work since the full approval of SIDIS
and PVDIS proposals in 2012.
• Strong Chinese collaboration, anticipated significant contributions
• Simple simulations  full simulations with realistic background
• Focused R&D activities to validate and finalize the conceptual design
for each subsystem
• CLEO Magnet: JLab management finalized agreement with CLEO
with DOE approval; recent CLEO site visit
• Several internal reviews: two brainstorming session (Physics
Division) and one informal external review (dry run)
• 1st draft pCDR submitted to Physics Division end of 2013
Iterations on manpower/cost. Help from Division and Project office.
Used Hall D actual expenditure of similar equipment
(magnet/detectors/installation) as base for manpower/cost estimation
• pCDR submitted to JLab management yesterday!
SoLID Organization Structure
Executive Board and Chair
•
Function: The Executive Board makes decisions on scientific and
organizational choices and provide high level oversight on all matter
pertaining to preparation and operation of the SoLID project.
The Chair of EB is the science leader and the principle contact
between the collaboration and the lab management/DOE. Will provide
oversight and input to the PM for the SoLID project. The chair,
together with the PM, is responsible for the performance and
assessment of all subsystems.
•
Initial members are the senior spokespeople plus the Hall leader (exofficio) and the PM (ex-officio). Paul Souder (PVDIS), Haiyan Gao
(SIDIS), Zein-Eddine Meziani (J/Psi), Thia Keppel (Hall Leader, exofficio) and Jian-ping Chen (PM, ex-officio).
Paul Souder is the 1st Chair. It is expected that the Chair position will
rotate.
Project Manager
•
Function: The Project Manager (PM) will be in charge of executing the
project and report to JLab management. The collaboration will provide
advice and oversight, and member of the collaboration will work under
PM in various roles to execute the project. For example, all
subsystems coordinators will report to PM.
PM has the authority and responsibility to manage the SoLID project.
•
Jian-ping Chen is the initial PM.
Technical Board
•
•
Function: Advises the PM on all aspects of the Project, including change
in cost, scope or schedule.
The TB will have a group of (usually senior) collaborators who represent
the full range of required technical expertise and usually a member from
each subsystem is expected to be on this board. This group will be
appointed by the EB. In addition, TB will include PM and also project
engineers when they are appointed.
•
TB membership can be periodically adjusted by the EB as the situation
warrants.
•
The chair of the TB will be the PM. All EB members who are not already
in TB are ex-officio members.
•
Initial members are:
Jian-ping Chen (Chair), Paul Souder, Haiyan Gao, Zein-Eddine Meziani,
Thia Keppel (ex-officio); Alexandre Camsonne,, Eugene Chudakov, Tom
Hemmick, Xiaodong Jiang, Nilanga Liyanage, Robert Michaels, Xin Qian,
Paul Reimer, Yi, Wang, Zhengguo Zhao, Xiaochao Zheng.
Subsystems/Responsibilities
• Overall coordination: (J.P. Chen/H. Gao/P. Souder)
•Calibration: (P. Souder/X, Qian)
•Magnet/Support/Simulations (Argonne/Duke/UVa/Umass)
• Magnet (JLab Engineering Div./ Argonne, P. Reimer)
• Detector supporting structure (Duke, H. Gao)
• General simulation (UVa, Z. Zhao/ Umass, S. Riordan)
• Neutron background simulation (Syracuse, L. Zana)
•Tracking (UVa/Chinese/others)
• GEM detectors (UVa, N.Liyanaga,/Chinese collaboration)
• Tracking software (JLab/O. Hansen/ Caltech, X. Qian/ Umass, S. Riordan)
• Gas Cherenkov(Temple/Duke/Stony Brook)
•Light gas Cherenkov (S. Malace/H. Gao, Z. Meziani, T. Hemmick)
•Heavy Gas Cherenkov (S. Malace/H. Gao Z. Meziani)
• EM Calorimeter (UVa/Los Alamos/W&M)
•Forward angle (UVa, Z.Zhao, X. Zheng/ W&M, D. Armstrong)
• Large angle (Los Alamos, J. Haung, X. Jiang/ Duke, M. Meziane, H. Gao)
•TOF with MRPC (Tsinghua, Y. Wang/Duke, H. Gao/JLab, A. Camsonne)
•DAQ and Trigger (JLab, A. Camsonne, Y. Qiang/Umass, R. Miskimen)
•Polarimeters: Compton (UVa, K. Paschke/JLab, S. Nanda)
Atomic Moller (Mainz, F. Mass, K. Aulenbacher/ W&M, W. Deconinck)
• Targets (JLab, J.P. Chen/JLab cryotarget group, D. Meekins)
• Infrastructure (JLab, Hall A engineer/design team, R. Wines)
More groups are joining (UIUC, J.C. Peng, MIT, S. Gilad, …)
Sub-Systems Coordinators
1)
2)
3)
4)
Magnet: Robin Wines/ Paul Reimer; JLab, Argonne
GEM-US: Nilanga Liyanange / Bernd Surrow; Uva, Temple
GEM-China: Zhengguo Zhao / Xiaomei Li; USTC, CIAE, Lanzhou, Tshinhua, IMP
Calorimeter: Xiaochao Zheng / Wouter Deconick/Chufeng Feng, Uva, W&M,
Shandong (China), Argonne, Los Alamos
5) Light Gas Cherenkov: Zein-Eddine Meziani / Michael Paolone, Temple
6) Heavy Gas Cherenkov: Haiyan Gao / Mehdi Meziane, Duke
7) DAQ/Electronics: Alexandre Camsonne / Rory Miskimen/Ron Gilman, JLab,
UMass, Rutgers
8) Simulation: Seamus Riordan / Zhiwen Zhao; Umass, Uva, Duke, Syracuse
9) Reconstruction and Analysis Software: Ole Hansen; JLab
10) Supporting Structure and Baffle: Robin Wines/Seamus Riordan; JLab, Argonne,
Umass
11) Hall Infrastructure Modifications: Robin Wines/Ed Folts; JLab
12) Installation: Ed Folts/Robin Wines; JLab, all user groups.