Difference between revisions of "GlueX PID Meeting, April 16, 2010"

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(notes as minutes)
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# Target Status: Rory Miskimen
 
# Target Status: Rory Miskimen
 
# [[Time-of-Flight/Start-Counter Action Items|Action Items]]
 
# [[Time-of-Flight/Start-Counter Action Items|Action Items]]
 +
 +
=Minutes=
 +
 +
sascha, simon, chris k, marki, eugene
 +
werner, eric
 +
sasha o
 +
rory
 +
 +
 +
Werner, have just signed new jlab, fiu bridge position mou
 +
search done, offer can be made
 +
 +
last time minutes
 +
 +
 +
have to sign paperwork to get sipm's, return loan agreement
 +
 +
 +
 +
sasha ostrovidov
 +
measurements with leading edge disc with adc to do time-walk
 +
old caen vme 12-bit adc
 +
100 ns gate, signal overlap
 +
poor gain phototube
 +
inefficienct pmt
 +
right vs left non-linear, left adc
 +
 +
chris, pulse tube refrigerator, pt415
 +
51k$
 +
w/ remote motor option, move motor outside main box,
 +
57k$
 +
includes cold head and compressor for helium gas
 +
remote option decreases cooling power by 10%
 +
emailed to tim, will send to Eugene
 +
remote motor 2 ft away
 +
ship 16 weeks after order
 +
 +
rory, mou, some edits from elton and fernando, coming to collaboration meeting, some issues, solid target in mou, but not funded in hall d. construction schedules in mou, viewed as not feasible due to funding profile, major revision
 +
 +
eric pooser
 +
 +
measured light output as a fuctnion of disktance 235mm thick,
 +
2.25 sr90 electrons, absorbtion coefficients measured
 +
2 462 mm
 +
3 249 mm
 +
5 221 mm
 +
using trigger pmt under source
 +
end of strip has fine-mesh pmt
 +
light guides? face of fine-mesh pmt against scintillator directly
 +
werner: why is so much light lost, perhaps lousy surface from manufacturer
 +
unpack and test directly
 +
brand new Eljen ej200
 +
eric: bending cutting and polishing, plan to work this summer with geant simulations of scintillor
 +
 +
adc pedestals
 +
reverse attenuation length relation with thickness

Revision as of 16:00, 16 April 2010

Location, Time

Friday, April 16, 2010
2:00 pm EDT
JLab: CEBAF Center, Room F326/7
ESNet: 8542553
EVO: direct meeting link
Conference Group: 800-377-8846, participant code: 77438230
Slides: talks can be deposited in the directory /group/halld/www/halldweb1/html/talks/2010-04 on the JLab CUE (you have to be a member of the "halld" group). This directory is accessible from the web at https://halldweb1.jlab.org/talks/2010-04/ .

Agenda

  1. Announcements
  2. Minutes from the last meeting
  3. Time-of-Flight Status: Sasha O. [1]
  4. Start Counter Status: Werner Boeglin/Eric Pooser
  5. Target Status: Rory Miskimen
  6. Action Items

Minutes

sascha, simon, chris k, marki, eugene werner, eric sasha o rory


Werner, have just signed new jlab, fiu bridge position mou search done, offer can be made

last time minutes


have to sign paperwork to get sipm's, return loan agreement


sasha ostrovidov measurements with leading edge disc with adc to do time-walk old caen vme 12-bit adc 100 ns gate, signal overlap poor gain phototube inefficienct pmt right vs left non-linear, left adc

chris, pulse tube refrigerator, pt415 51k$ w/ remote motor option, move motor outside main box, 57k$ includes cold head and compressor for helium gas remote option decreases cooling power by 10% emailed to tim, will send to Eugene remote motor 2 ft away ship 16 weeks after order

rory, mou, some edits from elton and fernando, coming to collaboration meeting, some issues, solid target in mou, but not funded in hall d. construction schedules in mou, viewed as not feasible due to funding profile, major revision

eric pooser

measured light output as a fuctnion of disktance 235mm thick, 2.25 sr90 electrons, absorbtion coefficients measured 2 462 mm 3 249 mm 5 221 mm using trigger pmt under source end of strip has fine-mesh pmt light guides? face of fine-mesh pmt against scintillator directly werner: why is so much light lost, perhaps lousy surface from manufacturer unpack and test directly brand new Eljen ej200 eric: bending cutting and polishing, plan to work this summer with geant simulations of scintillor

adc pedestals reverse attenuation length relation with thickness

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