https://wiki.jlab.org/cuawiki/index.php?title=General_Meeting_Summary_5/20/21&feed=atom&action=historyGeneral Meeting Summary 5/20/21 - Revision history2024-03-29T00:09:49ZRevision history for this page on the wikiMediaWiki 1.35.7https://wiki.jlab.org/cuawiki/index.php?title=General_Meeting_Summary_5/20/21&diff=3859&oldid=prevHornt: Created page with "PARTICIPANTS: Aaron Brown, Alexandre Camsonne, Arshak Asaturyan, Fernando Barbosa, Bogdan Wojtsekhowski, Brad Sawatzky, Carlos Munoz-Camacho, Carlos Yero, David Hamilton, Rolf..."2021-05-20T17:04:52Z<p>Created page with "PARTICIPANTS: Aaron Brown, Alexandre Camsonne, Arshak Asaturyan, Fernando Barbosa, Bogdan Wojtsekhowski, Brad Sawatzky, Carlos Munoz-Camacho, Carlos Yero, David Hamilton, Rolf..."</p>
<p><b>New page</b></p><div>PARTICIPANTS: Aaron Brown, Alexandre Camsonne, Arshak Asaturyan, Fernando Barbosa, Bogdan Wojtsekhowski, Brad Sawatzky, Carlos Munoz-Camacho, Carlos Yero, David Hamilton, Rolf Ent, Stephen Wood, Hamlet Mkrtchyan, Steven Lassiter, Tristan Anderson, Vardan Tadevosyan, Vladimir Berdnikov, Tanja Horn, <br />
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'''HV DIVIDER UPDATES''' (Fernando)<br />
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* New divider design has 5% of maximum anode current<br />
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* Amplification for 1V fADC250 scale is x15 (100mW/channel)<br />
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* Power supplies: <br />
::* high voltage supplies and boards remain, but need extra low voltage supplies<br />
::* Specifics for low voltage PS: need MPV8008LI (37-pin D-sub, 5A max per channel). Will need two (2) plus a spare (lead time 6 months) plus chassis and controller<br />
::* 2 cable assemblies per module<br />
::* implementation on detector level necessary - action item: need to figure out cable routing in the detector box<br />
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* Can amplifiers be put separate and outside the detector box?<br />
::* noise is a major consideration <br />
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* PMT socket reuse<br />
::* will be reused<br />
::* ship all from OU to JLab<br />
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* '''Actions and approximate timeframe:'''<br />
::* Finalize test divider, e.g., check potential at all electrodes to see if any adjustments and then measure signal amplitudes etc., and design (~ 2 weeks)<br />
::* Produce small batch and test (~2 weeks)<br />
::* aim for production in July - simple board to put together (~1 month)<br />
::* aim to be ready in September/October<br />
::* Figure out how to connect low voltage PS <br />
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'''DSG UPDATES''' (Aaron)<br />
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* Long term HV supply cable testing - some issues identified:<br />
::* readback current higher than expected - may need to do some module recalibration<br />
::* module channel cannot reach current - cables are fine<br />
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* Sensor scanning system development<br />
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* Hardware interlock system<br />
::* need to order a few additional items (humidity sensors, cable assemblies)<br />
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'''DESIGN/ENGINEERING''' (Steven)<br />
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* Cable box behind calorimeter box on order<br />
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* Cable layout - work in progress<br />
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* '''Action''': circulate image of cable box<br />
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'''CRYSTALS'''<br />
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* Crytur ~ 860 crystals available at present (+100 university). On track to reach goal by end of the FY<br />
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* Crystal stacking: Julie and team are evaluating the configurations with SICCAS crystals on outside and CRYTUR inside<br />
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'''VISITS TO JLAB IN SUMMER AND FALL'''<br />
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* JLab currently still in Medcon5: no new students, experts only, but anticipate policy modifications as overall conditions in VA and US improve<br />
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* '''Action''': all (external) teams send information about when visits are planned and as specific as possible the planned tasks to Steve (saw@jlab.org)<br />
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'''NEXT MEETING: THURSDAY 17 JUNE AT 9AM ET'''</div>Hornt