Star-fst-l mailing list

[Zhenyu Ye <yezhenyu2003 AT gmail.com>]

0. follow-ups on the action items from last week (see *** below)
1) Design light-tight box for the DAQ integration test at BNL - Rahul/Flemming
-> No update

2) Discuss how to mount modules onto the half-rings, and half-rings onto 
support structure - Rahul/Yi
-> Rahul: provided a few recommendations, e.g., use two pressed-fit pins, 
open holes for the other, changes to the PEEK
-> Yi: discussed with EASTON, had sent a couple of emails to Rahul, will 
document the proposed changes

3) Document the procedure and requirements of the module production steps 
that NCKU is responsible for - Yi
4) Look into radiation tolerance test of soft cooling tubes - Yi
-> See below

5) Tune the timing setting for ADC sampling - Xu/Gerard
-> tuning the timing does not change anything

6) Studying the tracking performance by varying the Z-locations of FST disks, 
and number of r/phi segments - Daniel/Krishan
-> Krishan: discussed with Daniel, Daniel said he finished the R-segment, and 
will send the updated code to Krishan

7) Looking into FST simulation and track reconstruction to compare 300 vs 500 
micron thick sensors - Shenghui/Zhenyu
-> Shenghui: has not fixed the issue of primary particle selection
-> Zhenyu: no reply from Jason

8) FST slow simulator with efficiency/resolution measured with prototypes and 
study tracking performance - Gavin/Shenghui/Xu
-> See below 

1. Integration       by Rahul Sharma, Felix Archampong
-> no major update, Felix working on detailing design 
-> will check with Bill Struble about ordering the missing piece for cooling 
system 

2. Tracking Studies                                                       by 
Daniel Brandenburg, Krishan Gopal

3. Simulation Studies                                                    by 
Shenghui Zhang

4. Prototype Module Assembly and Test                      by Xu Sun, Gavin 
Wilks, Zhenyu Ye
-> Zhenyu: FST03 being assembled at Fermilab, expected to finish sensor 
wire-bonding Tuesday. Two issues reported: 1) outer/inner chip off by 200/500 
microns towards sensor 2) wire-bonding on some pads on hybrid
-> Gavin: analyze data with rotated FST01 wrt IST, which gave better 
projection precision along FST-R. 
-> Xu: residual and efficiency can be qualitatively reproduced by toy MC 
simulation. Will introduce cross-talk to re-produce the residual distribution.

5. Mechanical structure                                                 by Yi 
Yang
-> 30%-40% good rate (based on surface flatness) of PEEK structure. FST04 is 
a good one, FST05 is an OK one. Will send FST04 with hybrids to US this week
-> 200/500 micron chip placement shift on FST03 due to usage of threaded 
guide pin? Will replace threaded holes by bushings and pressed-fit precision 
pins
-> wire-bonding issue: will change the hybrid-PEEK glue pattern 
-> Compatibility test results before/after irradiation for cooling soft 
tubes. Don't see obvious issue but results are not consistent with the 
vendor. Will contact the vendor. 

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

> On Jul 2, 2020, at 3:31 PM, Zhenyu Ye <yezhenyu2003 AT gmail.com> 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/2020/07/06/star-forward-silicon-tracker-meeting
> 
> 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 Assembly and Test                      by Xu Sun, Gavin 
> Wilks, Zhenyu Ye
> 5. Mechanical structure                                                 by 
> Yi Yang
> 
> *** Action items from previous weeks ***
> 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 the module production steps 
> that NCKU is responsible for - 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/Zhenyu
> 8) FST slow simulator with efficiency/resolution measured with prototypes 
> and study tracking performance - Gavin/Shenghui/Xu
> 
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