Commissioning and running of sPHENIX

["Liu, Ming Xiong" <mliu AT lanl.gov>]

Thank you Jamie, this is very helpful information.

 

For MVTX folks – I noticed the beam background hit rates of MBD_S(N)/ZDC_N&S went up quite significantly with 1.5mrad Xing-angle,

from 109 (ZDC =19kHz) to 162 (ZDC = 2.8kHz) for South and 132 to 227 for north, 50 ~70% increase. It would be good to check fast offline QA asap.  

 

Cheers,

Ming

 

-- 

Dr. Ming Xiong Liu

P-3 Group, MS H846

Nuclear and Particle Physics & Applications

Physics Division

 

Office: 505.667.7125

Mobile: 505.412.7396

Los Alamos National Laboratory

 

From: <sphenix-run-l-request AT lists.bnl.gov> on behalf of Jamie Nagle <jamie.nagle AT colorado.edu>
Reply-To: Jamie Nagle <jamie.nagle AT colorado.edu>
Date: Monday, July 22, 2024 at 6:33 PM
To: <sphenix-run-l AT lists.bnl.gov>
Subject: [[Sphenix-run-l] ] special run configurations (start of 0 crossing physics data, B=0 runs, test with +1.5 mrad crossing)

 

Hello All,

 

I wanted to send out a few run number ranges that may be of interest to various groups.

(1) We started running at zero crossing angle with a good physics run # 46619 on June 24, 2024.    As detailed in my General Meeting presentation - linked at the bottom, that is the point where I am starting the count on integrated luminosity with reasonable detector / DAQ / trigger quality.

(2) On July 21, 2024 the sPHENIX magnet tripped off.     During the investigation of the cause and before the magnet was ramped back up, sPHENIX collected a data sample with B=0 that includes both the MVTX and INTT (along with other detectors).   The run numbers are  # 48869 - 48877.     Hopefully these can be useful, for example for alignment studies.  

 

(3) Today, July 22, 2024, sPHENIX requested steering from 0 crossing angle into +1.5 mrad crossing angle as a test in anticipation of the TPC coming online in the next week.    The run numbers are # 489034 - 49054.   The run just before the change for comparison (still at zero crossing) was # 489029.    Below are a few figures relevant to the change over.

 

Sincerely,

 

Jamie

 

Link to GM talk - https://indico.bnl.gov/event/24275/contributions/94297/attachments/55956/95774/sPHENIXRunCoordinator_GMupdate07192024.pdf

 

Screen captures relevant just before and after steering to +1.5 mrad:

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|| Professor of Physics, University of Colorado Boulder

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