sPHENIX tracking discussion

["Huang, Jin" <jhuang AT bnl.gov>]

Hi Everyone

While the TPC gain balancing is still ongoing, we performed 28x28-bunch fill test with TPC today, which was a 4x increase in beam intensity compared to the last run. 

The main goal was to test GEM activity which is summarized below [as in accumulating slides deck]. nonZS big partition data was taken in this condition, which was summarized by Charles at https://chat.sdcc.bnl.gov/sphenix/pl/x7rogxog6igatkfaiderh5e9dc . 

The critical path remains with gain balancing TPC under this new operating gas, while we continue to pushing forward towards full lumi operation. 

Cheers

Jin

 

______________________________

 

Jin HUANG

 

Physicist, Ph.D.

Brookhaven National Laboratory

Physics Department, Bldg 510 C

Upton, NY 11973-5000

 

Office: 631-344-5898

Cell:   757-604-9946

______________________________

 

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From: Huang, Jin <jhuang AT bnl.gov>
Sent: Wednesday, July 31, 2024 12:03 AM
To: sphenix-tpc-l AT lists.bnl.gov <sphenix-tpc-l AT lists.bnl.gov>
Cc: sphenix-tracking-l AT lists.bnl.gov <sphenix-tracking-l AT lists.bnl.gov>; sphenix-tracking-l AT lists.bnl.gov <sphenix-tracking-l AT lists.bnl.gov>; sphenix-run-l AT lists.bnl.gov <sphenix-run-l AT lists.bnl.gov>
Subject: TPC gain measurement with beam in tracking meeting Wed 11AM

 

Hi everyone,

Quick reminder that we will use the beginning of the daily tracking meeting at 11AM to discuss analysis of TPC commissioning. https://indico.bnl.gov/event/24184/ 

In particular, the first beam data with Isobutane gas was collected Tue with the MIP-efficient HV work point determined from the Monday cosmic data [TPC Elog 553]. GEM gain measured with this dataset will allow us to build the HV divider resisters, balance the gain, then proceed towards full beam luminosity operation 

Cheers

Jin

______________________________

 

Jin HUANG

 

Physicist, Ph.D.

Brookhaven National Laboratory

Physics Department, Bldg 510 C

Upton, NY 11973-5000

 

Office: 631-344-5898

Cell:   757-604-9946

______________________________

 

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From: Huang, Jin <jhuang AT bnl.gov>
Sent: Monday, July 29, 2024 4:18 PM
To: sphenix-tpc-l AT lists.bnl.gov <sphenix-tpc-l AT lists.bnl.gov>
Cc: sphenix-tracking-l AT lists.bnl.gov <sphenix-tracking-l AT lists.bnl.gov>; sphenix-tracking-l AT lists.bnl.gov <sphenix-tracking-l AT lists.bnl.gov>; sphenix-run-l AT lists.bnl.gov <sphenix-run-l AT lists.bnl.gov>
Subject: Special TPC meeting on cosmic data review, Tue July 30 9:30AM.

 

Hi Everyone

As just discussed in shift change meeting, we will have a special TPC meeting at  Tue July 30 9:30AM tomorrow. Indico and zoom at https://indico.bnl.gov/event/24338/ 

TPC HV is being ramped for the first time after the new Isobutane gas mixture was circulated since Sat. We aim to collect sufficient cosmic data to establish the new GEM gain and a MIP-efficient HV work point priory to operate with collisions in the next steps. 

• Detailed plan are https://docs.google.com/presentation/d/e/2PACX-1vTvzKNq1u7-TICoJrPTI_wF9h-fa18lqR5c_Iqic3kKSp-eU5tfohVNuCYMfKwxTFoVihQngkbMELF6/pub?start=false&loop=false&delayms=3000 
• Live action at https://chat.sdcc.bnl.gov/sphenix/channels/tpc-electronics 

There could be many changes of the plan depending on factors like the detector response, and power stability etc. So, please stay tuned. 

Cheers

Jin

 

______________________________

 

Jin HUANG

 

Physicist, Ph.D.

Brookhaven National Laboratory

Physics Department, Bldg 510 C

Upton, NY 11973-5000

 

Office: 631-344-5898

Cell:   757-604-9946

______________________________