Sphenix-tpc-l mailing list

["Hughes, Charles [PHYSA]" <chughes2 AT IASTATE.EDU>]

Hello All

Today I'm using the sphenix-tpc list at the suggestion of @Huang, Jin. I'm not sure who all is on that list, so I included some of the Debrecen and BNL folks as well (apologies if you got 2 emails).

Let's meet MONDAY 03.03 at 9:30 AM ET (3:30 PM CET) to discuss ongoing operations/analysis/planning for the TPC. In particular:

 

• HV: Last week we made a lot of progress which has culminated in the TPC running every night and continuously throughout the weekend. However there is still more progress to be made including HV channel mapping and further work on the GUI (implementing weather compensation). Additionally, @Thomas K Hemmick asked me to investigate the cable for NS 12 o'clock R3 and we should discuss plan about that.
  
  
• Gas/Cooling: @Robert P. Pisanihas helped get our cooling to the point where it has been proven stable for many days. Rob has also requested s few hours when the HV/LV can be off for him to commission some new temperature sensors for the CDU in the hall which will give a much better picture of what's going on there. We should also ask him when the dry cabinet will be installed.
  
  
• LV/FEEs: Last week we also made progress reducing the noise in the TPC, discovering the EMCAL rack communications module as a big contributor. @Haggerty, John and @Stephen Boose will need to get together to discuss workable solutions. Also @Sakaguchi, Takaohad expressed a desire to explore replacing some FEEs which are newly malfunctioning. Tom had some questions for the Takao and Jin about the TPC FEE settings (why is pedestal set to 60, how to fix the wandering pedestal issue). I would like to talk to Jin and Takao about re-calculation of the TPC ZS thresholds. Since the noise was reduced, last years thresholds are not optimal.

• Diffuse Laser: Friday, @Huang, Jin asked if he could re-start services on the diffuse laser fan out board. We asked him to hold off until tomorrow. I think we should bring back the diffuse laser entirely, including some standalone runs to send to Ben Kimmelman for re-analysis. Let's discuss.

• Line Laser: @Seth Howell, @Azmoun, Bob, @Finnelli, Kristina, and @Kuczewski, John made great progress on the TPC line laser. This culminated in the testing of the lasers in the NS bore on Friday. We should discuss this as well as @divaldo95 AT gmail.com's work on the noise mitigation. We should also discuss the path forward including Seth's alignment parameter search and getting to the point where we can think about threading the laser into the TPC.
• Contingency Box: As @Mandracchia, Kevin said, we need to discuss with John when we can ramp up work with the contingency boxes. We should also make sure we take advantage of @shana Prifte's offer to help.
• Analysis: Now that we have a good amount of cosmic data, we should discuss analysis of this for gain balancing. @josborn1 AT bnl.gov and @Luke Legnosky have started to look around in the data. What do we need to do to get to MIP peaks ? 
• Any other pressing business (directives from the workfest, offline analysis, etc...). For example, firmware upgrade.

Indico Link:https://indico.bnl.gov/event/27062/

Zoom Link:https://urldefense.com/v3/__https:/bnl.zoomgov.com/j/1619343392?pwd=MDExeG91aHgyYlJrUldadjZSaGdhUT09__;!!P4SdNyxKAPE!HRoSUDHkh2yMr832EO6tBSgqxIDI10WSRcVdFxtfkmUyGQB_7rYDnEOAP_lv18LmBgev-KS8Ir-CovNhM1aUEu6Btq077w$

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