sPHENIX is a new detector at RHIC.

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

Hi Everyone

Here are the notes for preliminary performance plot approval for Cheng-Wei Shih at preGM/PCM just now: https://indico.bnl.gov/event/27224/ 

The plots are conditionally approved, pending on the following adjustment embedded as bold in the discussion notes below: 

Jaein Hwang/Hugo: 

• What is “INTT hit counts”? 
• Conclusion: y-axis better use “INTT hits”

Hugo/Jin: 

• Right plot is not very helpful
• Conclusion: drop the right plot and approve for the left and middle plot. 

Hugo/Jin:

• First bin after trigger has higher than normal yield (though nonetheless only 1% yield comparing to the trigger-crossing, and not affecting the main message): likely from INTT hit timing precision, such as fix threshold discriminator would induce a late timing registration responding to a low amplitude hit pulse 

Hao-ren/Itaru/Jin: 

• How to quote timing resolution? 
• INTT measure hits in timing gates of 106ns (one crossing) wide, and therefore the probability distribution of the measured hit time is not a Gaussian distribution, more resembles a flat distribution
• Conclusion: rephrasing that INTT timing is precise enough to separate bunch crossing.

Megan/Hugo:

• Negative timing region having no content is misleading due to limited measurement capability in that region 
• Conclusion: start x-axis from -1 crossing (i.e. not showing the negative timing region) 

Hao-ren:

• Move the histogram to center bins at integer bunch crossing, rather than integers at the edge of bins

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: sphenix-l-request AT lists.bnl.gov <sphenix-l-request AT lists.bnl.gov> on behalf of Megan Connors <meganeconnors AT gmail.com>
Sent: Thursday, March 20, 2025 1:10 AM
To: Sphenix L <sphenix-l AT lists.bnl.gov>
Subject: [[Sphenix-l] ] 3rd preGM+PCM and 194th General Meeting (GM) on March 20/21

 

Dear collaborators,

Please join us for the 3rd preGM+PCM and 194th GM: 

• preGM+PCM: biweekly collaboration-wide meeting series for news, analysis approvals, and discussion at an Asian time zone friendly time

• Thursday March 20, 10 PM EST
• zoom: https://bnl.zoomgov.com/j/1617309690?pwd=EI7Mv9sw6AwlV0JSLchfLRsdR2Ioq9.1 
• agenda: https://indico.bnl.gov/event/27224/

General Meeting:

• Friday March 21, 12 PM EST
• (same) zoom: https://bnl.zoomgov.com/j/1617309690?pwd=EI7Mv9sw6AwlV0JSLchfLRsdR2Ioq9.1 
• agenda: https://indico.bnl.gov/event/27223/
• Those at BNL are welcome to join from the conference room in the 1008 counting house

Looking forward to talking to everyone with the combination of the two meetings!

Best regards

Jin & Megan