PREX Meeting Notes, Mar 11, 2010
Present: Bob Michaels, Ole Hansen, Mindy Jen, Luis Mercado,
Krishna Kumar, Megan Friend, Gregg Franklin, Brian Quinn,
Richard Holmes, Sasha Glamazdin, Paul King,
Alexandre Camsonne, Zafar Ahmed, Diancheng Wang,
Jon Wexler, Seamus Riordan, Guido Urciuoli,
Doug Higinbotham, Abdurahim Rakham, Al Tobias,
Dustin McNulty, Tim Holmstrom, Kiadtisak Saenboonruang
Shifts start Wed Mar 17 according to present schedule.
Next week start daily meetings in 2nd floor counting room
on Tuesday Mar 16. Each day at 3 pm.
Luis / DAQ
DAQ is basically ready but will swap out 6 ADC16 for ADC18 in CH.
Updated the ADC list
Questions re: panFFB speed. Richard Holmes to investigate
Compton -- Abdurahim and Al
Optics ready. Beam alignment done.
All hardware in place. Polarization measurements done.
Got better polarization at CIP after replacing mirrors.
Polarization transfer function: measurements done but
"might be incomplete" (this needs to be clarified).
New cavity mirrors: gain = 4500
Pumping out vacuum now, will bake out soon.
Tried to align light in cavity, tried to lock -- didn't work.
Problems with locking listed -- not sure I (the author of
these notes) understood it, so I won't write it here.
Still to do: calibrations of power meter and other stuff,
some EPICS control software.
Megan / Brian Q. -- Compton DAQ
It's ready !
L-bracket platform on both HRS
X-Y sliders hooked to portserver
Supports for scint.
Cabling for quartz
Hardware for detector mounting
Very active installation schedule this weekend
Need to setup trigger system (function generator)
Need BMW mods
Ole -- Gems
Chambers from INFN and UVa
5 chambers on site, 6th arrives tomorrow from UVa
All being installed in 1 HRS
KK asks: Can we point from VDCs to test Gems ? (ans: Yes)
Sasha -- Moller
Vacuum problem fixed
Will cool magnet
Meetings w/ MCC re: Moller procedures and apparatus.
FSD requirements ironed out.
Meeting re: pulsed mode (expert mode).
Will be "slightly invasive" to hall B (I'm still
not sure what this means)
SU scint: noisy at 900V, ok at 700V.
testing with cosmics
Dustin asks: using a x10 amplifier ? (ans: Yes)
Checking connections for cavities and Lumis
KK comment: will review all noise issues and see what
needs to be done. Need hel-corr x-talk studies, etc.
Working with Megan, learning about Compton
RCs will need to undergo training to be able to take
the load off techs at nights or odd times. The protocol
for calling techs will be clarified; essentially all
calls at odd hours for routine fixes like resetting Q1 must go
through the RC if the shift workers don't know what to do.
Next meeting Tues Mar 16 at 3 pm 2nd floor CH
Index of Meetings