Documents

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:

Photon threshold=10 MeV

Photon threshold=3 MeV

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

PAC39 proposal, May 2012

Hamamatsu PMT Specs 11 Oct 2013, C.E.Hyde