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  • From: Gerard Visser <gvisser AT indiana.edu>
  • To: star-fst-l AT lists.bnl.gov
  • Subject: Re: [Star-fst-l] Weekly FST meeting, August 10 9am (BNL time)
  • Date: Tue, 11 Aug 2020 08:16:14 -0400

hi Yi,
I am consfused by the pictures since don't the big tantalum capacitors on existing T-board face towards the mechanical structure? That was said to be the problem, which is now being fixed. But it doesn't look like a problem in your pictures???
Were you able to actually plug in the outer hybrid? It looks like you
did.
Also as a small comment, will it really be good to use loose nuts for this fastening? We should as much as possible avoid the risk of dropping small parts, *especially* for an operation that might have to be performed with the FST in STAR out on the insertion rails, above and around the TPC and BEMC electronics boards which are all exposed there. I had though there would be press-nuts on one side or the other. Maybe this is impossible, at least now, but we should think about it.
Sincerely,

Gerard


On 8/10/2020 11:33 PM, Yi Yang wrote:
Hi all,

We tried to mount the T-Board onto MS and it seems to be okay.
But I think we should prepare some toolings for the installation.
Please check some photos in the following link:
T-Board_mounting.pdf <https://drupal.star.bnl.gov/STAR/system/files/T-Board_mounting.pdf>

Cheers,
Yi


+++++++++++++++++++++++++++++++++++++++++++++++++++
Yi Yang, Associate Professor
Department of Physics
National Cheng Kung University
Tainan, 701 Taiwan
E-Mail: yiyang AT ncku.edu.tw <mailto:yiyang AT ncku.edu.tw>
Tel: +886-6-2757575 ext.65237
Fax: +886-6-2747995
Group Web: https://urldefense.com/v3/__http://phys.ncku.edu.tw/*yiyang__;fg!!P4SdNyxKAPE!W5M4UdinEhwlABPO4qYdbrIyUG8cw_Ej1yiqspBgI8zunHc1NrpDjMNHyc099j77wHb_-Oc$ <https://urldefense.com/v3/__http://phys.ncku.edu.tw/*yiyang__;fg!!P4SdNyxKAPE!RrBFMBGZeyx7A9EvAOYEtwDPoTzu6UesNtbcWnWCrk3Ntska06asz6ZScNS3e41dLZMtdaQ$>
+++++++++++++++++++++++++++++++++++++++++++++++++++


On Tue, Aug 11, 2020 at 1:25 AM Ye, Zhenyu <yezhenyu AT uic.edu <mailto:yezhenyu AT uic.edu>> wrote:

Minutes:

1. Flemming showed a draft of committee recommendations. He will have a
meeting with the committee this afternoon. Expect to have a final version
soon.

2. Silicon sensors
-> Zhenyu: requested for a new quote from Hamamatsu. Partial delivery of
Silicon sensors is not possible.

3. Use thermal camera with cooling applied to the other side of the
mechanical structure to check if there is air trapped between hybrid and
MS
-> Yi: trying it this week. Consider doing this in production

4. Update the T-board design
-> Jianing will update the design this week
1) Move the capacitor to the other side
2) Add two ground holes
3) Tolerance for mounting T-board on the MS, taking into account the
constraint from connecting the outer hybrid
4) Check mounting T-board on the MS -> Yi will do it at NCKU

5. Split HV for inner and outer
-> Decided to split HV. Mike/Gerard will look into the changes to PPB and
back-of-crate boards

6. Integration
-> Rahul: will do a tolerance analysis, taking into account the
clearance/project requirements but also what can be achieved by the
machine
shop. Need to have a plan for survey and discuss with Survey group

7. Simulation
-> Gavin/Shenghui: slow simulator based on cosmic data is ready. Trying to
run the tracking code on RCF.

8. Mechanical structure
->  Yi: Han-Sheng leaving the project next week for PhD in US. Test the
new
procedure with old hybrids. Will verify with the vendor about changes to
the
precision pin: lead and pin lengths

***** Action items *****
1) Design and fabricate light-tight box for the DAQ integration test at
BNL
- Rahul/Flemming
2) Design the cooling lines, and cable trays between disks and cooling
manifold - Felix/Rahul
3) Finalize how to mount modules onto the half-rings, and half-rings onto
support structure, and document the proposed changes to the mechanical
structure - Rahul/Yi/Zhenyu
4) Survey procedure/requirements - Rahul

5) Prepare documents for prelim Safety review with C-AD - all
6) Get updated quote from Hamamatsu - Zhenyu
7) Design and fabricate module storage boxes for production at UIC -
Xu/Andres
8) Duplicate the module assembly tooling at UIC - Xu/Zhenyu
9) Discuss with Fermilab about module assembly schedule - Zhenyu

10) Update the T-board design to avoid the conflict with Mechanical
structure - Jianing/Maowu
11) Check how T-board mount onto MS - Yi

12) Look into splitting the inner and outer sensor HV bias - Mike/Gerard
13) Send the problematic prototype cable-T-board assembly to Mike for
investigation - Zhenyu/Mike
14) Develop the QC procedure for Inner cable and T-board assembly -
Mike/Maowu

15) Look into the overall large CMN noise, and the abnormal noise of few
channels first appear in the readout - Gerard/Xu
16) Check the FST noise performance at high readout rate - Xu/Zhenyu
17) Sett up the laser test stand to characterize prototype module
performance - Andres/Zhenyu
18) FST slow simulator with efficiency/resolution measured with prototypes
and study tracking performance - Gavin/Shenghui

> On Aug 8, 2020, at 10:48 AM, Ye, Zhenyu <yezhenyu AT uic.edu
<mailto: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/2020/08/10/star-forward-silicon-tracker-meeting
>
> 0. follow-ups on review and action items
> 1. Integration           by Rahul Sharma, Felix Archampong
> 2. Hybrid and T-board                                               by
Maowu Nie, Jianing Dong
> 3. Simulation Studies by Gavin Wilks, Shenghui Zhang, Daniel Brandenburg
> 4. Prototype Module Assembly and Test                       by Zhenyu
Ye
> 5. Mechanical structure  by Yi Yang
> _______________________________________________
> Star-fst-l mailing list
> Star-fst-l AT lists.bnl.gov <mailto:Star-fst-l AT lists.bnl.gov>
> https://lists.bnl.gov/mailman/listinfo/star-fst-l

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