FWD Software

["Brandenburg, James" <jbrandenburg AT bnl.gov>]

Dear Nicole,

Thank you for this study. I agree with  you that it indicates some issue with potential overlap between PCB and GAS. I will look into this as I continue with my study of the hits in simulation.

Best,

Daniel

On Nov 18, 2022, at 8:19 AM, Lewis, Nicole <nlewis AT bnl.gov> wrote:

Hi Everyone,

Here are some slides of the material budget of the sTGC gas:

https://drupal.star.bnl.gov/STAR/system/files/sTGC_Gas_Material_Budget.pdf.

After I implemented Flemming's comments (slides 2 and 3), there were no changes to the gas's material budget. 

I spent some time this yesterday playing around with eliminating different detector components from the geometry and seeing how that affected the gas's material budget.  When the gas is the only component of the geometry, its material budget drops by over an order of magnitude (slides 4 and 5).  And when I add back only the PCB (the only component that is actually touching the gas), the gas's material budget is exactly the same as when all other components are included.  To me this implies that there is some overlap between the gas and the PCB, but that does not make sense given how everything is placed in the geometry file.  

Thanks,

Nicole

---

From: Star-fwd-software-l <star-fwd-software-l-bounces AT lists.bnl.gov> on behalf of Brandenburg, James <jbrandenburg AT bnl.gov>
Sent: Thursday, November 17, 2022 12:28 PM
To: star-fwd-software-l AT lists.bnl.gov <star-fwd-software-l AT lists.bnl.gov>
Subject: [Star-fwd-software-l] Fwd Software Meeting minutes Thursday, November 17, 2022

 

Dear All,

Thank you for joining this morning. Below are the minutes for the meeting this morning.

Best,
Daniel

Daniel: Updates
- PR adding FST data to StEvent and StMuDst accepted and merged into DEV
- PR adding FCS WFF updates accepted and merged into DEV
- Working on  StFwdTrack Updates and ROOT geom from Jason's directions (for tracking in BFC)

Gavin: Tracking Alignment
- Previous result showing consistency between full & MC tracking was a book-keeping mismatch. Full Tracking DOES show difference compared to MC Tracking. MC Tracking recovers correct parameters
- Daniel and Gavin will look into possible reason that Full tracking leads to a bias
- Gavin will investigate the actual performance (pT res and charge ID) for realistic alignment case

Daniel & Flemming: sTGC Geometry
- Flemming found and fixed several remaining overlaps in sTGC geometry
- Daniel, based on suggestion from Flemming, removed all non-essential parts of geometry 
- move ahead with sTGC simulation and add supporting structures back

Nicole: sTGC Geometry
- Will make new material budget plots incorporating Flemmings changes and send to list ASAP

Discussion of EPD efficiency and tracking check
- Isaac will begin with this topic as a step towards full analysis
- The goal here is to check if the EPD efficiency is reasonable based on past estimates
- Second is to check how often EPD sees activity that is not reflected by FWD tracking - check of FWD tracking efficiency with minimal projection extrapolation needed

David: FCS WFF
- cross check of old vs. new algorithm
- Overall good agreement - need to check the reduced counts in pi0 peak
  - Maybe due to cut of 1 GeV for clusters -> new algo may have lower avg cluster energy
  - Need to run an event-by-event comparison to understand why peak is reduced while sidebands are not.

FCS Calibration:
- Individual calibrations are progressing. Xilin or another will summarize results after thanksgiving.


Rough list of items for Dec 6th Meeting:

- Gavin: Alignment
- Te-Chuan: FST QA progress
- Nicole: sTGC geometry updates
- David: FCS WFF cross checks
- Xilin or another: FCS Calibration update
- Isaac: Initial progress on analysis (EPD efficiency or J/Psi analysis)
- Xiaofeng: sTGC Timing studies
- Daniel: Tracking & Geometry updates


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