Star-fst-l mailing list

["Ye, Zhenyu" <yezhenyu AT uic.edu>]

*** Action items from previous weeks ***
1) Design light-tight box for the DAQ integration test at BNL - Rahul/Xu
-> Xu sent Rahul the drawings he has. Elke raised a question about the 
manpower demand on STSG. Flemming will take a look and discuss with Rahul how 
to proceed. 

2) Discuss how to mount modules onto the half-rings, and half-rings onto 
support structure - Rahul/Yi
-> Rahul/Yi had a meeting last Tuesday. Rahul did not fully understand how to 
mount modules, and will have another meeting after tomorrow's forward 
meeting. NCKU will modify guide pin areas (details in discussion). Zhenyu 
reminded that no interference/modification should be introduced to the 
Fermilab module assembly jigs. 

3) Document the procedure and requirements of gluing hybrids onto MS for Plan 
A at NTU - Yi
-> No update on the (80% complete) document from last meeting. 

4) Look into radiation tolerance test of soft cooling tubes at STAR/Taiwan - 
Yi
-> students working on it. Finished analyzing data for one sample, and will 
finish the analysis for the second sample this week. Have to send another 
sample to the radiation facility. Final results in two weeks. 

5) BNL send a T-board and cable assembly to NCKU to check if there is any 
conflict with the MS - Mike 
-> Mike dropped it off, but was not picked up by the delivery service yet. 

6) Looking into alternative clustering algorithm to improve matching 
efficiency - Xu/Zhenyu
-> See below

7) Tune timing setting for ADC sampling - Xu/Gerard

8) Studying the tracking performance by varying the Z-locations of FST disks, 
and number of r/phi segments - Daniel
-> Daniel integrated FST fast simulator into his tracking study setup, which 
now uses hit collection from StEvent.
-> Daniel also solved the issue that Krishan had in his study. In the 
previous version of the tracking code, the covariant matrix of hit errors 
were input in several places of the tracking code, and not all places were 
updated when the number of r/phi segments were varied. This explains why no 
change was seen when the numbers were varied by Krishan. After the above 
mentioned update, the hits are now read out centrality from StEvent which 
also resolved the issue. Expect to have the correct results in 2-3 days. 
-> Discussion ongoing with Jason: to have a detailed detector module in 
simulation, and a simplified version in reconstruction. Probably ready in the 
next 1-2 weeks. 

9) Looking into FST simulation and track reconstruction to compare 300 vs 500 
micron thick sensors - Shenghui
-> Shenghui realized that her definition of primary/secondary particles, 
which was based on isShower flag, is problematic. She is trying to find the 
correct way to do so in the code. 
-> got in touch with Jason to get his help to make the material budget plot 
for FST. 

10) Post code that used to analyze the simulation data and Flemming will take 
a look - Shenghui/Flemming
-> Flemming will send some comments to Shenghui later. 

1. Integration - Rahul/Felix
-> Continues working on the design of installation structures, communicating 
with machine shop, making changes based on inputs from machine shop. 
-> Will continue the discussion with Yi on pinning (see above)

2. Prototype performance test- Xu
-> Xu presented final results of clustering studies from outer FST sensor. 
-> Gavin/Shenghui will work on put the measured detection efficiency and 
residual distribution into FST simulator and study the tracking performance 
in STAR MC simulation. 

3. Mechanical structure - Yi 
-> Sent a bare module with hybrid mounted last Friday, which will be 
delivered to Fermilab today. To solder the components, NCKU engineer used 
soldering wire with 220 degree C melting temperature and a high power 
soldering machine. 
-> Another bare module with hybrid may be ready for shipment to Fermilab on 
June 30. 
-> Discussed with Jianing on change ground path to reduce the thermal 
conductivity and thus make it easier to solder on the components.

4. STAR internal review 
-> briefly discussed what were needed for the review and when. Will continue 
the discussion offline 

*** Action items ***
1) Design light-tight box for the DAQ integration test at BNL - Rahul/Flemming
2) Discuss how to mount modules onto the half-rings, and half-rings onto 
support structure - Rahul/Yi
3) Document the procedure and requirements of gluing hybrids onto MS for Plan 
A at NTU - Yi
4) Look into radiation tolerance test of soft cooling tubes - Yi
5) Tune the timing setting for ADC sampling - Xu/Gerard
6) Studying the tracking performance by varying the Z-locations of FST disks, 
and number of r/phi segments - Daniel/Krishan
7) Looking into FST simulation and track reconstruction to compare 300 vs 500 
micron thick sensors - Shenghui
8) Make slow simulator with efficiency/resolution measured with prototypes to 
study tracking performance - Gavin/Shenghui

> On Jun 19, 2020, at 3:57 PM, Ye, Zhenyu <yezhenyu AT uic.edu> wrote:
> 
> Dear all, 
> 
> We will have the Weekly FST meeting on Monday starting at 9am EST (BNL 
> local time). 
> 
> Bluejeans Meeting URL https://bluejeans.com/101020434
> Meeting ID: 101 020 434
> 
> https://drupal.star.bnl.gov/STAR/event/2020/06/22/star-forward-silicon-tracker-meeting
> 
> Tentative meeting agenda:
> 
> 0. follow-ups on the action items from last week (see *** below)
> 1. Integration                                                              
>         by Rahul Sharma, Felix Archampong
> 2. Tracking Studies                                                       
> by Daniel Brandenburg, Krishan Gopal
> 3. Simulation Studies                                                    by 
> Shenghui Zhang
> 4. Prototype Module Test                                              by Xu 
> Sun
> 5. Mechanical structure                                                 by 
> Yi Yang
> 
> *** Action items from previous weeks ***
> 1) Design light-tight box for the DAQ integration test at BNL - Rahul/Xu
> 2) Discuss how to mount modules onto the half-rings, and half-rings onto 
> support structure - Rahul/Yi
> 3) Document the procedure and requirements of gluing hybrids onto MS for 
> Plan A at NTU - Yi
> 4) Look into radiation tolerance test of soft cooling tubes at STAR/Taiwan 
> - Yi
> 5) BNL send a T-board and cable assembly to NCKU to check if there is any 
> conflict with the MS - Mike 
> 6) Looking into alternative clustering algorithm to improve matching 
> efficiency - Xu/Zhenyu
> 7) Tune the timing setting for ADC sampling - Xu/Gerard
> 8) Studying the tracking performance by varying the Z-locations of FST 
> disks, and number of r/phi segments - Daniel/Krishan
> 9) Looking into FST simulation and track reconstruction to compare 300 vs 
> 500 micron thick sensors - Shenghui
> 10) Post code that used to analyze the simulation data and Flemming will 
> take a look - Shenghui/Flemming
> 
> 
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