sPHENIX MAPS tracker discussion

[Xin Dong <xdong AT lbl.gov>]

Hi All,

Thanks Hao-Ren for generating the QA histograms. Based on his root file, I did a quick analysis and please see the findings below

https://indico.bnl.gov/event/24069/contributions/93529/attachments/55585/95095/20240701_MVTX_BeamLine.pdf

The slides are also posted to today's MVTX meeting indico page

The proposed actions can be found in the last page:

1) W.r.t. the condition for the data that Hao-Ren generated, I would propose we request CAD to move the beam orbit at sPHENIX IR horizontally towards x+ direction by 4mm, and if possible, also vertically downwards by 1mm.

2) But, the beam position may change, particularly considering recent changes in terms of beam conditions, we should re-analyze the latest beam data and check again.

3) We should continue monitoring the beam position throughout the Run. The MVTX cluster phi distributions are a good measure to monitor this.

Comments and suggestions are more than welcome. Thanks and best Regards

/xin

On Mon, Jul 1, 2024 at 8:46 PM Xin Dong <xdong AT lbl.gov> wrote:

Hi Hao-Ren,

Thank you. I have one question regarding the MVTX cluster phi distribution. You labeled "w.r.t origin". So what origin was used here for the cluster phi angle calculation? If you can clarify, that would be much appreciated.

Thanks and Best Regards

/xin

On Mon, Jul 1, 2024 at 2:41 PM Hao-Ren Jheng <hrjheng AT mit.edu> wrote:

Hi Xin,

I just uploaded my slide to the indico page: https://indico.bnl.gov/event/24069/contributions/93529/attachments/55585/95090/MVTXComm-20240701.pdf.

You can find one of the histogram files under my working directory: /sphenix/user/hjheng/sPHENIXRepo/macros/TrackingProduction/HIST_PHYSICS_run2pp_new_2024p001-00046667-0000.root

(You may find the histograms in this file are not the same as the plots I showed in the meeting. I figure a run without any stave missing is more convenient for you to make use of it.)

Please let me know if you have any further suggestion to the QA module.

Best,

Hao-Ren

On Jul 1, 2024, at 16:22, Xin Dong via sPHENIX-MAPS-l <sphenix-maps-l AT lists.bnl.gov> wrote:

Hi Hao-Ren,

Could you post your nice QA slides you showed today at the MVTX meeting to indico? Particularly, if you can also share with me the histogram root files for the MVTX layer cluster density distributions vs. phi and the event Vy vs. Vx, I can try to do a quick calculation on the beam position shift w.r.t to the MVTX center and we may feed back to the operation team and make the request.

Thanks and Regards

/xin

On Fri, Jun 28, 2024 at 8:39 AM Liu, Ming Xiong via sPHENIX-MAPS-l <sphenix-maps-l AT lists.bnl.gov> wrote:

Dear all,

We will have MVTX meeting next Monday at the usual time, 12:30PM/ET.

• MVTX operation status
• Offline analysis- raw data QA & monitoring, noise/threshold, alignment etc.
• AOB

 

Draft agenda, https://indico.bnl.gov/event/24069/

 

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Cheers,

Ming

 

-- 

Dr. Ming Xiong Liu

P-3 Group, MS H846

Nuclear and Particle Physics & Applications

Physics Division

 

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==================================================
Xin Dong
Nuclear Science Division, Lawrence Berkeley National Laboratory
MS70R0319, One Cyclotron Road
Berkeley, CA 94720, USA
Tel: +1-510-486-4121
Email: XDong AT lbl.gov
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--

==================================================
Xin Dong
Nuclear Science Division, Lawrence Berkeley National Laboratory
MS70R0319, One Cyclotron Road
Berkeley, CA 94720, USA
Tel: +1-510-486-4121
Email: XDong AT lbl.gov
==================================================

--

==================================================
Xin Dong
Nuclear Science Division, Lawrence Berkeley National Laboratory
MS70R0319, One Cyclotron Road
Berkeley, CA 94720, USA
Tel: +1-510-486-4121
Email: XDong AT lbl.gov
==================================================