View source for General Meeting Summary 12/1/22

PARTICIPANTS: Hamlet Mkrtchyan, Arthur Mkrtchyan, Steven Lassiter, Paulo Medeiros, Robert Michaels, Vardan Tadevosyan, Vladimir Berdnikov, David Hamilton, Tanja Horn, Julie Roche, Pramita Tiwari, Deb Biswas, Hakob Voskanyan, Bogdan Wojtsekhowski, Gyang Chung, Carlos Munoz-Camacho, Marie Boer, Mark Jones, Zheng Huang, Yeranuhi Ghandilyan, Mahmoud Gomina


'''NOISE/OSCILLATIONS ISSUE''' (Brad, Bob)

* Noise/oscillation is back
::* was never really gone, but suppressed down to mV level
::* after a long cosmic with same configuration run found that noise/oscillations back
::* impact of temperature?

* origin of oscillations is at divider - now up to 20mV (lower than before, but still too much for production)

* shielding around bases - did not make difference

* '''Action items''':
::* understand nature of feedback mechanism on base and address last bit of remaining oscillation amplitude - reduce it
::* specific tests include the modification on front end of OP-END - low pass filter, Chris earlier modified a few bases - made a difference but not sufficient - need to further optimize


'''ASSEMBLY ACTIVITIES''' (Brad, Yeran)

* DSG working on production GUIs - good progress on LV and HV and thermal readback GUI

* Installed another rack in EEEL108 to plug in chassis for thermal readout

* Extension cables - some extra materials purchased and being tested 

* LED and pulser system - met with B. Moffit (software) and W. Gu
::* front end GUI developed by DSG
::* goal is to have beta quality GUI and driver set up by end of December/early January
::* should be able to run LED system from command line earlier

* Strain relief modifications for cables in both EEL 108 and production

* Cabling - finished! - see also: https://wiki.jlab.org/cuawiki/index.php/NPS_Assembly#Cabling_-_COMPLETE_.2811.2F18.2F2022.29
::* 2 people needed 2 hours for 4 bundles


'''DAQ/Electronics''' (David H)

* '''Action item''': event unblocking - need to test in CODA system with f250 (David H)
::* code available in the Analyzer for fADCs and TI
::* take sample data in EEL - e.g., turn off calorimeter
::* David H make sure blocked data are taken and check hcana, then give data file to Ole H
::* Yeran/Artur may be able to help
::* Vladimir/Brad can help

* multi-block mode - try to generate data with different configurations (crates, etc.)

* can get blocked data at any time from f250 - 


'''MECHANICAL''' (Paulo, Steven L.)

* Beamline delivered

* Cable strain relief

* Beam line corrector magnet - major piece that needs to be procured still


'''PREPARATIONS FOR INSTALLATION'''

* Google sheet to capture major items for installation and responsible party

* Taking shifts on current experiments to gain experience with Hall C equipment, in particular students


'''NEXT MEETING: 22 DECEMBER AT 9:00AM ET'''