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[nie <nie AT rcf.rhic.bnl.gov>]

Hi Zhenyu and all,

Please find the details of the four hybrids below:
https://drupal.star.bnl.gov/STAR/blog/nie/measurements-hybrid

The items of the hybrids include: flatness, thickness, pad location 
test, outline test and chip location test.

Generally speaking, the measurements are quite consistent with the CAD 
values. But we also find the outer hybrid from the old vendor, the pad 
location and chip location have large deviation(~1 mm) from the designed 
values. We further asked the company to double check their results, and 
they confirmed the measurements was correct.

For the two reference holes A and B, the information can be found below:
Inner: A(0,0) B(68.428, -1.498)  AB = 68.44 mm
Outer: A(0,0) B(117.374, 0.762)  AB = 117.38 mm

Hope it helps,

Thanks,
Maowu & Jianing

在 2020-05-26 01:43，Ye, Zhenyu 写道：
> 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
> > _______________________________________________
> > Star-fst-l mailing list
> > Star-fst-l AT lists.bnl.gov
> > https://lists.bnl.gov/mailman/listinfo/star-fst-l
>
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