Difference between revisions of "Documents"
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* Experimental requirements on hardware: | * Experimental requirements on hardware: | ||
| − | ::* [https://wiki.jlab.org/cuawiki/images/c/c5/Reply_TAC_PR12-13-010.pdf DVCS (Table 2 | + | ::* [https://wiki.jlab.org/cuawiki/images/c/c5/Reply_TAC_PR12-13-010.pdf DVCS (Table 2 shows HMS and photon trigger rates for each of the settings.)] |
| − | shows HMS and photon trigger rates for each of the settings.)] | ||
* [https://wiki.jlab.org/cuawiki/index.php/File:Fadc_time.pdf Note on fADC timing] | * [https://wiki.jlab.org/cuawiki/index.php/File:Fadc_time.pdf Note on fADC timing] | ||
Revision as of 12:56, 4 December 2013
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
Simon's report on WACS simulations
Notes from Peter Kroll, Nov 2012
SIDIS mesons
DES mesons
Notes from Peter Kroll, Nov 2012
Detector
- 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.
- 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)
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:
Hamlet's report on crystal properties from Hall C meeting, 24 January 2013
New Active PMT Base for PbWO4 (Popov, H. Mkrtchyan, presentation at IEEE, Nov 2012)
Description of the PbWO4 detector option:
Presentation at Orsay Workshop, 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
Electronics
- Experimental requirements on hardware: