overview of solid jian-ping chen solid collaboration meeting june 13-14, 2012
DESCRIPTION
SIDIS Requirements Kinematics Coverage: – 0.05 ~ 0.6 in x (valence) – 0.3 ~ 0.7 in z (factorization region) – P T up to ~ 1.5 GeV (TMD Physics) – Fixed target Q 2 coverage 1-8 GeV 2 (~ 2 GeV 2 in ΔQ 2 at fixed x) – CLEO: 9-17 degrees for 9-24 degrees for e Luminoisity: – unpolarized ~ N/cm 2 /s – polarized ~ N/cm 2 /s Polarized 3 He Target: – ~ 60% higher polarization – Fast spin flip (TRANSCRIPT
Overview of SoLID Jian-ping Chen
SoLID Collaboration Meeting June 13-14, 2012
•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• Possibility also for exclusive reactions
• Three Approved Experiments with “A” rating:• PVDIS (E12-10-007), (Paul’s talk)• SIDIS: (E12-10-006) and (E12-11-007) (Haiyan’s talk)
• Conditionally approved proposal: Proton SIDIS (Haiyan’s talk)
Condition: transversely polarized NH3 target compatible with SoLID
Progress: magnet design on-going
• New Ideas:• J/Psi Proposal: submitted to PAC39• Other possibilities (some discussed at the last meeting)
SoLID Experiments
SIDIS Requirements• Kinematics Coverage:
– 0.05 ~ 0.6 in x (valence)– 0.3 ~ 0.7 in z (factorization region)– PT up to ~ 1.5 GeV (TMD Physics)– Fixed target Q2 coverage 1-8
GeV2 (~ 2 GeV2 in ΔQ2 at fixed x)– CLEO: 9-17 degrees for 9-24 degrees for e
• Luminoisity:– unpolarized ~ 1037 N/cm2/s– polarized ~ 1036 N/cm2/s
• Polarized 3He Target:– ~ 60% higher polarization– Fast spin flip (<20 mins)
• Electron PID: (1-7 GeV/c)– <1% Pion contamination
• Pion PID:– <1% Kaons and Protons– <1% electron contamination
• Resolution:– < a few % in δP/P.– <1 mr in polar angle.– <10 mr in azimuthal angle – ~ 1-2 cm vertex resolution– Similar precision required.– A factor of 2 better achieved in MC
• DAQ:– ~ 3kHz Physics Coincidence– ~ 200 kHz Single electron– ~ 50 kHz Coincidence– Limits: 300 MB/s to tape.
PVDIS• 0.5% precision over broad
kinematics range. – 22-35 degrees– Beam Polarimetry – Control false asymmetries in
PID/Tracking.• New Cryotarget Design
– Challenges in mechanical engineering.
– Control of false asymmetry.• High luminosity 1039 N/cm2/s
– Baffle to block direct photons • Effectively reduce luminosities on
detectors. – Background in Cerenkov.– Radiation dose in Calorimeter.
• Similar to SIDIS requirement
• Electron PID: (2-7 GeV/c)– < ~1% Pion contamination– Gas Cerenkov + E&M
Calorimeter for < 3.0 GeV– Calorimeter alone for high
Momentum– GEM for tracking
• 30 sectors, each employs an independent DAQ system.– Simpler design than SIDIS. – < 10 kHz per sector
• Require L3 farm and online tracking.– Proof-of-principle of tracking
was achieved. • 2.5 kHz per sector @ 1 CPU @
3.0 GHz.
Design Considerations• Kinematic Coverage:
– CLEO magnet is ideal – In addition to 11 GeV, data taking at
8.8/6.6 GeV and also for radiative corrections
• Luminoisity-> high rate:– Requirement on GEMs, Cerenkov.– Radiation dose on E&M Calorimeter
and front end electronics. – Requirement on DAQ system.
• Electron PID:– Combination of E&M
calorimeter + Gas Cerenkov (SIDIS/PVDIS shared equipments)
– Advantage of coincidence measurement in SIDIS (additional Pion suppression)
• Pion PID (SIDIS):– Gas Cerenkov + E&M Calorimeter
to suppress electron. – TOF (MRPC) at low momentum to
suppress kaons/protons– Heavy Gas Cerenkov to suppress
kaons in high momentum.
GEM
SoLID- PVDIS Configuration
SoLID- SIDIS Configuration
PVDIS vs SIDIS
Can you find six differences between these panels?
Target Location, Baffles (PVDIS), Cerenkov’s,GEM Layout, Extra E-Cal, MRPC(SIDIS)
Status
Magnet Comparison
6 January 2012
Paul E. Reimer, Magnets, SoLID "Brainstorm" session10
CLEO magnet will produce the desired acceptance and resolution for both SIDIS and PVDIS
• Simulation GEANT3 GEANT4 based GEMC (adapted from
Hall B)Event generatorsMagnetic field (BaBar CLEO)Detector digitization
• Background Background for physicsFLUKA for neutron backgroundRadiation damage Baffle design
• Detector SimulationsGEM (adapted from SuperBB)Cherenkov (stand-alone GEANT4)EM calorimeter (stand-alone GEANT4)
•Tracking (Ole’s talk)
Simulation/Background/TrackingS. Riordan’s talk
L. Zana’s talk
O. Hansen’s talk
Layout in SoLID
Subsystems: Gaseous Electron Multipliers (GEMs) UVa/INFN/ Chinese Collaboration (USTC/CIAE/Lanzhou/Tsinghua/IMP)
Readout scheme
PVDIS
SIDIS
Optimized for f resolution
R&D shared with Super BigBite.Additional challenges to overcome: * planes dimensions as large as 100 cm: => 99 x 40 GEM foil crafted by CERN
* high number of channels: => Scalable Readout System (SRS) from CERN; channel unit cost going down to few $
N. Liyanage’s talk
PVDIS: one gas Cherenkov for electron/pion separation+ trigger
Subsystems: Gas Cherenkovs
SIDIS: two gas Cherenkovs:one for electron/pion separation,one for pion/kaon separation.
e-
p
SoLID Cherenkov collaboration: - Duke University; - Temple University; - Stony Brook University;
1 m
0.9 m
2 m
Observer
Mirrors
“Winston” cone
e-
Electron Cherenkovs:Two options:-H8500C maPMT; CO2/ (SIDIS)- C4F8O/N2 (PVDIS)- GEM+CsI; CF4
Range: 1.5-4.5 GeV/c (SIDIS)- 2-4 (PVDIS)
Basic design (1 sector)Pion:Gas:C4F8O at 1.5 atmUseful range:2.5-7.5 GeV/c
Mirrors
Z.Maziani’s talkT. Hemmick’s talk
Provides pion rejection + trigger.Uses shashlyk technology (sandwich of Pb and scintillator):Advantages: - radiation hard (500 kRad); - good energy and timing resolution (tunable by choice of material/thickness of layers)
Subsystems: EM Calorimeter
PVDIS
Considered block geometry/layout.Square block: easy assembly/rearrangement.
preshower/shower to improve pion rejection:
SoLID EM calo collaboration: - Los Alamos National Lab; - University of Virginia; - Duke University; - College of William and Mary;
SIDIS
Forward angle calo
Large angle calo
X. Zheng’s talk
Data Acquisition
- Benefits from Hall D DAQ development; - Performance to be tested within next few years.
- Responds to demanding SoLID requirements: 50-100 kHz evt rate x 4kB /evt (SIDIS)
A. Camsonne’s talk
• 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, …)
Subsystems/Responsibilities
One option: split and mix Chinese contribution, NSF/MRI, Modest DOE/MIE, JLab capital equipment, Sharing readout systems amongst Halls
• Magnet: extraction/transport/refurbish/infrastructure: ~$3-5 M JLab
• GEMs ~ $4-5 M (Anticipate) Mainly Chinese Collaboration
• Cherenkov ~$3-4 MCollaboration: MRI or MIE
• EM Calorimeter: $3-5 MCollaboration: MRI / MIE
• DAQ/Trigger electronics 3-4 MJLab Physics Division sharing among 4 halls.
(Very Rough) Cost and A Plan to Move Forward