Difference between revisions of "General Meeting Summary 8/23/17"
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(Created page with "DETECTORS AT JLAB (Arthur, Richard) * SHMS Aerogel detector ::* broken bolts on top fixed with help of Walter's team - uses same holes as before, drilled/tapped and installed ne...") |
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::::* Diameter is less than 19.2 mm as requested, result from 4 randomly selected PMTs: 19.0 +-0.2 mm - see [http://www.vsl.cua.edu/cua_phy/images/0/02/IMG_5238.jpg this picture] | ::::* Diameter is less than 19.2 mm as requested, result from 4 randomly selected PMTs: 19.0 +-0.2 mm - see [http://www.vsl.cua.edu/cua_phy/images/0/02/IMG_5238.jpg this picture] | ||
::::* Labels (est. thickness 50-100 um) are not glued to PMT body as requested to maximize space for shielding - see [http://www.vsl.cua.edu/cua_phy/images/1/19/IMG_5128.jpg picture] | ::::* Labels (est. thickness 50-100 um) are not glued to PMT body as requested to maximize space for shielding - see [http://www.vsl.cua.edu/cua_phy/images/1/19/IMG_5128.jpg picture] | ||
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| + | ::* Crystal arrival - latest update: delivery of all 460 by end of September | ||
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| + | ::* Magnet main coil shipment delayed until end of November (A few pictures: [http://www.vsl.cua.edu/cua_phy/images/1/12/J-lab_1.jpg Pic1], [http://www.vsl.cua.edu/cua_phy/images/f/fe/J-lab_2.jpg Pic2]) | ||
* HMS Aerogel Detector | * HMS Aerogel Detector | ||
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::* thermal profile simulation - initial results available | ::* thermal profile simulation - initial results available | ||
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* Crystal testing | * Crystal testing | ||
Latest revision as of 12:33, 23 August 2017
DETECTORS AT JLAB (Arthur, Richard)
- SHMS Aerogel detector
- broken bolts on top fixed with help of Walter's team - uses same holes as before, drilled/tapped and installed new hex bolt, anticipate this to be a recurring issue due to materials difference (stainless steel bolt and aluminum box)
- still need to take cosmic data to check if light leak fixed - ideally would like scintillators and drift chambers on during this test
- Trays SP-20, SP-15 and SP-11 are stored in ESB building in roped off area near HKS equipment
- Neutral Particle Spectrometer
- Crystal arrival - latest update: delivery of all 460 by end of September
- HMS Aerogel Detector
- Testing method to remove Bates PMTs without breaking them
- Working on PMT scanning setup to test Bates PMTs once installed in the cylinders
PBWO4 STUDIES AT CUA (Richard, Andres)
- design drawings including thermal design complete
- indicate existing holes on furnace sides
- add additional holes needed on furnace top and sides
- indicate furnace heating elements for interference checks
- mechanical setup ready and calibrated - link the results
- heating elements have been installed
- thermal profile simulation - initial results available
- Crystal testing
- all systems ready for crystal testing
- commissioning of new pulse generator ongoing
- possible incompatibility between TTL output and electronics - check out manual for input pulse requirements
- reflector optimization studies ongoing
DATA ANALYSES AND SIMULATIONS (Salina, Dannie)
- need to resolve issue of current dependence of DVCS coda events vs. DIS events
- investigate calo part (bottom circuit on page 2) vs. HRS singles (top part of same diagram)
- Note that HRS has delay of ~1 usec to form trigger, while ARS (calo) takes about 600 ns for signal
- Resolved several issues in uncertainty calculation, e.g. dependence of mean on specific binning and unit inconsistencies
- Results look reasonable and encouraging for structure function studies!
- may want to check consistency with Kijun's calculation of uncertainties
- Work on detector simulations ongoing
OTHER
- Vladimir still waiting for visa - hopefully after 1 Sept
NEXT MEETING: WED 30 AUGUST at 10:00 AM (EDT)