Difference between revisions of "Documents"

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== Calorimeter ==
 
== Calorimeter ==
  
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=== General ===
+
=== NPS Geant4 simulation for Hall C DVCS ===
  
−
Description of the PbWO4 detector option:
+
* [https://github.com/gboon18/HallC_NPS GitHub]: use DVCS_evt_gen/.
  
−
[https://indico.in2p3.fr/getFile.py/access?contribId=19&sessionId=3&resId=0&materialId=slides&confId=7052 Presentation at Orsay Workshop, Nov 2012]
+
* [https://wiki.jlab.org/cuawiki/images/f/fa/User_Guide.pdf A very short User Guide].
  
−
[http://www.jlab.org/exp_prog/proposals/12/C12-11-102.pdf PAC39 proposal, May 2012]
+
=== NPS software and calibration ===
  
−
[https://wiki.jlab.org/cuawiki/images/9/9c/Energy_Calibration_of_the_NPS_Calorimeter.pdf Energy Calibration of NPS Calorimeter, June 2020]
+
* [https://wiki.jlab.org/cuawiki/images/9/9c/Energy_Calibration_of_the_NPS_Calorimeter.pdf Energy Calibration of NPS Calorimeter, June 2020]
  
 
=== Crystal characterization ===
 
=== Crystal characterization ===
−
 
  
 
* [http://www.vsl.cua.edu/cua_phy/index.php/MainPage:Nuclear:NPS:PWO:CrystalLOG Table of results of SICCAS crystals produced in 2014 and 2015] - measurements carried out at CUA
 
* [http://www.vsl.cua.edu/cua_phy/index.php/MainPage:Nuclear:NPS:PWO:CrystalLOG 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 tests of subsets of the 10+5 SICCAS produced crystals (2014) at Giessen, BNL, and Caltech
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::* [https://wiki.jlab.org/cuawiki/images/2/2e/PWO_SIC_BNL_measurements.pdf Results for crystals 7 and 15 from BNL]
 
::* [https://wiki.jlab.org/cuawiki/images/2/2e/PWO_SIC_BNL_measurements.pdf Results for crystals 7 and 15 from BNL]
  
−
 
+
* [http://www.vsl.cua.edu/cua_phy/images/c/cb/Hamlet.pdf Hamlet's report on crystal properties from Hall C meeting, 24 January 2013]
−
[http://www.vsl.cua.edu/cua_phy/images/c/cb/Hamlet.pdf Hamlet's report on crystal properties from Hall C meeting, 24 January 2013]
 
  
 
* ''PbWO4 references'':
 
* ''PbWO4 references'':
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::* P. Yang et al., "Growth of large-size crystal of PbWO4 by vertical Brigdman method with multi-crucibles
 
::* 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)
 
::* R. W. Novotny, "The Electromagnetic Calorimetry of the PANDA Detector at FAIR", J. Phys. Conf. Serv. 404 012063 (2012)
−
 
  
 
=== PMTs ===
 
=== PMTs ===
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* ''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 [https://wiki.jlab.org/cuawiki/images/a/ac/NSS2012_JLAB.pdf report at the 2012 IEEE NSS/MIC/RTSD conference] by V. Popov and H. Mkrtchyan.
 
* ''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 [https://wiki.jlab.org/cuawiki/images/a/ac/NSS2012_JLAB.pdf report at the 2012 IEEE NSS/MIC/RTSD conference] by V. Popov and H. Mkrtchyan.
  
−
 
+
* [http://www.vsl.cua.edu/cua_phy/images/a/ac/NSS2012_JLAB.pdf New Active PMT Base for PbWO4 (Popov, H. Mkrtchyan, presentation at IEEE, Nov 2012)]
−
[http://www.vsl.cua.edu/cua_phy/images/a/ac/NSS2012_JLAB.pdf New Active PMT Base for PbWO4 (Popov, H. Mkrtchyan, presentation at IEEE, Nov 2012)]
 
−
 
 
  
 
'''Hamamatsu PMT Specs'''  11 Oct 2013, C.E.Hyde
 
'''Hamamatsu PMT Specs'''  11 Oct 2013, C.E.Hyde
Line 115: Line 108:
  
  
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=== Dose Rate Estimates ===
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=== NPS Dose Rate Estimates ===
  
−
[http://www.vsl.cua.edu/cua_phy/images/a/a1/NPS-dose-rates.pdf Dose rate estimations for PbWO4 detector at 4m from target, at 1uA, and for a 10-cm long target]
+
* [http://www.vsl.cua.edu/cua_phy/images/a/a1/NPS-dose-rates.pdf Dose rate estimations for PbWO4 detector at 4m from target, at 1uA, and for a 10-cm long target]
  
  
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−
=== NPS Geant4 simulation for Hall C DVCS ===
+
=== History of the NPS (2012) ===
  
−
[https://github.com/gboon18/HallC_NPS GitHub]: use DVCS_evt_gen/.
+
* [https://indico.in2p3.fr/getFile.py/access?contribId=19&sessionId=3&resId=0&materialId=slides&confId=7052 Presentation at Orsay Workshop, Nov 2012]
  
−
[https://wiki.jlab.org/cuawiki/images/f/fa/User_Guide.pdf A very short User Guide].
+
* [http://www.jlab.org/exp_prog/proposals/12/C12-11-102.pdf PAC39 proposal, May 2012]
  
 
= [[Magnet]] =
 
= [[Magnet]] =

Revision as of 18:21, 17 November 2020

Publications

PAC Presentations and NPS Physics Notes

PAC46: TCS

PAC45: WACS polarization observables

PAC43: WACS polarization observables, TCS LOI

PAC42: WACS, pi0 photoproduction

PAC40: DVCS/pi0 cross sections, SIDIS pi0, WACS

Physics Notes

DVCS/pi0 Cross Sections and SIDIS pi0

Wide-Angle Compton Scattering (WACS)

WACS Neutral Pion Photoproduction

Calorimeter

NPS Geant4 simulation for Hall C DVCS

NPS software and calibration

Crystal characterization

  • 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:
  • 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.

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
Magnetic Field Response Media:R7877_Magnetic_Field_Characteristics.pdf
Cathode Lifetime data Media:QG1369A_R7877_Life.pdf
Magnetic Field Response Media:R4125_Effects_of_Magnetic_Fields.pdf
Cathode Lifetime data Media:R4125_(100_uA_&_1000_h)_QG0016B.pdf


NPS Dose Rate Estimates


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:

Photon threshold=10 MeV

Photon threshold=3 MeV


History of the NPS (2012)

Magnet

Light monitoring and Curing System

Notes on Light Monitoring System from Hamlet

Notes on Curing System from Hamlet


Electronics

  • Experimental requirements on hardware:



High Intensity Photon Source

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