Star-fst-l mailing list

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

Felix, Krishan, Han-Sheng, Maowu, Pu-Kai, Shenghui, Te-Chuan, Xu, Yi, Zhenyu

1. Follow-up on action items from previous weeks
1) Integration: send an email with detailed questions to the list to collect 
information - Rahul/Felix 
2) Document the procedure and requirements of gluing hybrids onto MS for Plan 
A at NTU - Yi/Han-Sheng 
-> the procedure is almost determined. will have the document ready next week
3) Look into radiation tolerance test of soft cooling tubes at STAR/Taiwan - 
Flemming/Yi
-> tubes are being exposed to radiation. The total doses would be 1x and 5x 
of the ones in the proposal. Will repeat the measurement with NOVEC at NCKU 
after radiation. 
4) Measuring hybrid flatness, thickness and dimensions - Maowu/Jianing
-> see below 
5)) UIC send a T-board and cable to NCKU to check if there is any conflict 
with the MS - Zhenyu 
6) Looking into alternative clustering algorithm to improve matching 
efficiency - Xu
7) Tune the timing setting for ADC sampling - Gerard/Xu
-> see below
8) Studying the tracking performance by varying the Z-locations of FST disks, 
and number of r/phi segments - Daniel/Krishan
-> see below
9) Looking into FST simulation and track reconstruction to compare 300 vs 500 
micron thick sensors - Shenghui

2. Integration - Felix
Working on changing the Z-locations of FST disks

3. Simulation - Krishan
Has obtained momentum resolution, but it is different than Daniel’s. Will 
check with Daniel. Have results for different numbers of r- and phi-segments. 

4. Hybrid - Maowu
1) Measured the flatness of two sets of hybrids (1 from old and 1 from new 
vendor). The maximum deviation of thickness is less than 18 (7) microns for 
old (new) vendor. 
2) Measured relative positions of bonding pads w.r.t. the center of VIA-A, 
which would be used as one of the two reference points on the hybrid when 
gluing the hybrid onto the mechanical structure. The shifts from the design 
in the direction perpendicular to wire-bond are between (+20, +60) microns.
* Action item - Maowu: add the absolute differences in the excel file. Find 
out the design value of the distance between the two reference VIAs on the 
hybrids. 
* Action item - question for Yi: There are two VIAs that would be used as 
reference points on the hybrid when gluing the hybrid onto the mechanical 
structure. The rotation is determined by the line connecting the centers of 
the two vias. Which point will be used to determine the position of the 
hybrid?

5. Prototype module test - Xu
Has found and used the code to tune the setting for ADC timing for FST. Will 
check with Gerard about the results

Mechanical structure - Yi
1) glued one hybrid onto MS. Good in general by eye. There are a few places 
that need to improve. Will try to address them and start gluing hybrids onto 
a good MS this Thursday/Friday, and glue the inner/outer sections together. 
2) Will measure the distance between the centers of the two reference VIAs on 
the hybrid and compare to the design values from Maowu. Will measure the 
relative positions of the two reference VIAs w.r.t. pins in the MS.
4) Will measure the surface flatness of the MS before and after gluing the 
hybrids
5) Will do electrical tests after the connector is soldered onto the hybrid. 
Zhenyu recommends to do it after plugging and unplugging the male connectors 
to make sure the soldering is robust. Yi is not sure if he has male 
connectors. Maowu will check if SDU has male connectors and if so send to Yi

*** Action items *** 
1) Integration: send an email with detailed questions to the list to collect 
information - Rahul/Felix 
2) Document the procedure and requirements of gluing hybrids onto MS for Plan 
A at NTU - Yi/Han-Sheng 
3) Look into radiation tolerance test of soft cooling tubes at STAR/Taiwan - 
Flemming/Yi
4) Measuring hybrid flatness, thickness and dimensions - Maowu/Jianing
5)) UIC send a T-board and cable to NCKU to check if there is any conflict 
with the MS - Zhenyu 
6) Looking into alternative clustering algorithm to improve matching 
efficiency - Xu
7) Tune the timing setting for ADC sampling - Gerard/Xu
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



> On May 21, 2020, at 10:07 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/2020/05/25/star-forward-silicon-tracker-meeting
> 
> Tentative meeting agenda:
> 
> 0. follow-ups on the action items from last week (see *** below)
> 1. Testing Prototype at STAR During Shutdown           by Flemming Videbaek
> 2. Tracking Studies                                                       
> by Daniel Brandenburg, Krishan Gopal
> 3. Integration                                                              
>         by Rahul Sharma, Felix Archampong
> 4. Hybrid                                                                   
>         by Maowu Nie, Jianing Dong
> 5. Mechanical structure                                                 by 
> Yi Yang
> 6. Prototype Module Test                                              by Xu 
> Sun
> 7. Simulation Studies                                                    by 
> Shenghui Zhang
> 
> *** Action items from previous weeks ***
> 
> 1) Integration: send an email with detailed questions to the list to 
> collect information - Rahul/Felix 
> 2) Document the procedure and requirements of gluing hybrids onto MS for 
> Plan A at NTU - Yi/Han-Sheng 
> 3) Look into radiation tolerance test of soft cooling tubes at STAR/Taiwan 
> - Flemming/Yi
> 4) Measuring hybrid flatness, thickness and dimensions - Maowu/Jianing
> 5)) UIC send a T-board and cable to NCKU to check if there is any conflict 
> with the MS - Zhenyu 
> 6) Looking into alternative clustering algorithm to improve matching 
> efficiency - Xu
> 7) Tune the timing setting for ADC sampling - Gerard/Xu
> 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
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