Documents
Presentations and Proceedings
PAC45
PAC43
PAC42
PAC40
Physics
DVCS
Rafael's first report on DVCS simulations
Charles presentation from Hall C meeting, 24 January 2013
Study of effects on kinematics if require HMS angle to be >=13 deg (.pdf)
Beam Time Sharing DVCS and pi0 (.pdf)
WACS
New kinematics from David based on 8 Nov. 2013 collaboration meeting discussions (Nov 2013)
Simon's report on WACS simulations
Notes from Peter Kroll, Nov 2012
SIDIS mesons
see PAC40 proposal
DES mesons
Notes from Peter Kroll, Nov 2012
Neutral Pion Photoproduction
Ratio pi0/pi+ from Peter Kroll model at 90CM
Ratio pi0/pi+ t dependence from Peter Kroll model
Detector
General
Description of the PbWO4 detector option:
Presentation at Orsay Workshop, Nov 2012
Energy Calibration of NPS Calorimeter, June 2020
Crystal characterization
- Table of results of SICCAS crystals produced in 2014 and 2015 - measurements carried out at CUA
- Results of tests of subsets of the 10+5 SICCAS produced crystals (2014) at Giessen, BNL, and Caltech
- Results of crystals 2, 3, 6, 8, and 9 from Giessen:
- Absorption coefficient
- Transmittance
- Light Yields: LY_2, LY_3, LY_6, LY_8, LY_9
Hamlet's report on crystal properties from Hall C meeting, 24 January 2013
- PbWO4 references:
- P. Adzic et al., "Radiation Hardness qualification of PbWO4 scintillation crystals for the CMS Electromagnetic Calorimeter", CMS Note 2009/016
- A.A. Annenkov et al., "Lead Tungstate scintillation material", NIM A 490 (2002) 30-50
- P. Yang et al., "Growth of large-size crystal of PbWO4 by vertical Brigdman method with multi-crucibles
- R. W. Novotny, "The Electromagnetic Calorimetry of the PANDA Detector at FAIR", J. Phys. Conf. Serv. 404 012063 (2012)
PMTs
- PMT specs: Hamamatsu R4125, 19mm diameter, gain is about 8.7E+5 at 1.5kV max. anode voltage and rise time 2.5ns. This PMT was also used in Primex and we have designed a new active voltage divider that improves the performance of the PMT by a factor of 25. See the report at the 2012 IEEE NSS/MIC/RTSD conference by V. Popov and H. Mkrtchyan.
New Active PMT Base for PbWO4 (Popov, H. Mkrtchyan, presentation at IEEE, Nov 2012)
Hamamatsu PMT Specs 11 Oct 2013, C.E.Hyde
- specs on standard 1" PMTs:
- R8619 10 stage PMT
- R9800 8 stage PMT
- Low profile (short) 29mm R7111 PMT Media:R7111.pdf
- Mesh Dynode PMT (30x30 mm2) Media:R11187_data_sheet_0911.pdf R11187=replacement for Hall A DVCS R7877
- Magnetic Field Response Media:R7877_Magnetic_Field_Characteristics.pdf
- Cathode Lifetime data Media:QG1369A_R7877_Life.pdf
- R7525 29mmφ PMT Media:R7525-TPMH1244E02.pdf
- R4125 19mmφ (Standard for PbWO4)
- Magnetic Field Response Media:R4125_Effects_of_Magnetic_Fields.pdf
- Cathode Lifetime data Media:R4125_(100_uA_&_1000_h)_QG0016B.pdf
Dose Rate Estimates
Dose rate estimations for PbWO4 detector at 4m from target, at 1uA, and for a 10-cm long target
Scattering Chamber Information:
- outer diameter = 45 inches
- inner diameter = 43.125 inches
- distance beam line to SHMS window = 1.25 inches
So for a point target, the minimum angle is 58 mr or 3.4 degrees. For an extended target you will need to adjust, it becomes about 4 degree for a 15 cm target. So assume 3.5 degrees as rough number.
Study of possibilities for larger beam pipe assemblies
Energy spectra for electrons, photons, positrons including fits
Rates and rates per crystal vs. angle relative to beam for: 4 m from target, 6.6 GeV beam energy, 1uA beam current, and 10-cm LH2 target for:
NPS Geant4 simulation for Hall C DVCS
GitHub: use DVCS_evt_gen/.
Magnet
Light monitoring and Curing System
Notes on Light Monitoring System from Hamlet
Notes on Curing System from Hamlet
Electronics
- Experimental requirements on hardware: