Difference between revisions of "BLTWG Meeting 10/2/2008"

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(List of documents for review pre-brief package)
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# A description of the present status of the fixed hodoscope.
 
# A description of the present status of the fixed hodoscope.
 
# The June R+D note on the microscope  
 
# The June R+D note on the microscope  
 +
#* [http://argus.phys.uregina.ca/gluex/DocDB/0010/001074/003/report-6-2008.pdf June Report]
 
#* [http://argus.phys.uregina.ca/gluex/DocDB/0011/001125/001/report-8-2008.pdf September Report]
 
#* [http://argus.phys.uregina.ca/gluex/DocDB/0011/001125/001/report-8-2008.pdf September Report]
 
# The pair spectrometer proposal with a few updated.
 
# The pair spectrometer proposal with a few updated.

Revision as of 13:37, 1 October 2008

  • Time: 9:30 EST
  • Place: EVO and ESNET (with telephone bridge)
  • Connecting: instructions are here
  • Present:

Agenda

  1. Writeups needed for the pre-brief materials packet - see below
  2. Tim's updated tagger hall drawings
  3. Relative placement of fixed array and microscope - Richard, Franz, Tim
  4. Resolution on tagger pole shape - Jim, Yang
  5. Remaining simulation studies needed for review - Richard
  6. Progress on simulation of the collimators - Sascha



List of documents for review pre-brief package

  1. The general consensus was that we should take chapter 4 in the TDR version 4 and re-write it and then use this as the core of the pre-brief material.
  2. A short document which summarized the recommendations from the last review and how they were resolved.
  3. A drawing package for the magnet needs to be provided.
  4. An update of the preliminary spec should be given.
  5. Yang's note on the TOSCA and transport studies should be included. Dan Sober has agreed to work on improving this document.
  6. A description of the present status of the fixed hodoscope.
  7. The June R+D note on the microscope
  8. The pair spectrometer proposal with a few updated.
  9. Plan for what we want to study with diamonds.

Table of contents for Chapter4 of the TDR V4

http://argus.phys.uregina.ca/gluex/DocDB/0011/001127/002/PPS_Review08.pdf

1 Introduction 1
2 Choice of technique 3
2.1 Compton back-scatter . . . . . . . . . . . . . . . . . . . . . . 3
2.2 Tagged bremsstrahlung . . . . . . . . . . . . . . . . . . . . . . 6
2.3 Coherent bremsstrahlung . . . . . . . . . . . . . . . . . . . . . 7
3 Photon source 11
3.1 Essential features . . . . . . . . . . . . . . . . . . . . . . . . . 12
3.2 Use of collimation . . . . . . . . . . . . . . . . . . . . . . . . . 14
3.3 Choice of radiator . . . . . . . . . . . . . . . . . . . . . . . . . 23
3.4 Crystal quality . . . . . . . . . . . . . . . . . . . . . . . . . . 25
3.5 Crystal thickness . . . . . . . . . . . . . . . . . . . . . . . . . 31
3.6 Crystal mount . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
3.7 Crystal alignment and monitoring . . . . . . . . . . . . . . . . 35
3.8 Crystal lifetime . . . . . . . . . . . . . . . . . . . . . . . . . . 36
4 Electron beam 39
4.1 Beam polarization . . . . . . . . . . . . . . . . . . . . . . . . . 39
4.2 Beam emittance . . . . . . . . . . . . . . . . . . . . . . . . . . 41
4.3 Electron beam line optics . . . . . . . . . . . . . . . . . . . . . 44
4.4 Electron beam dump . . . . . . . . . . . . . . . . . . . . . . . 47
4.5 Beam containment and shielding . . . . . . . . . . . . . . . . . 47
5 Tagging spectrometer 51
5.1 Specifcations . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
5.2 Magnet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
5.3 Spectrometer optics . . . . . . . . . . . . . . . . . . . . . . . . 54
5.4 Tagger detectors . . . . . . . . . . . . . . . . . . . . . . . . . 56
5.4.1 Focal plane microscope detectors . . . . . . . . . . . . 56
5.4.2 Fixed focal plane array . . . . . . . . . . . . . . . . . . 56
5.5 Beam dump optics . . . . . . . . . . . . . . . . . . . . . . . . 57
6 Polarimetry instrumentation 59
7 Operating beam intensity 63