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[Gerard Visser <gvisser AT indiana.edu>]

hi Yi,
	I apologize I was confused on that first point, I didn't remember that there 
were capacitors on both sides of the T-board, which is clear from a look at the 
gerber files again. The plan for new version is then that all will be on the 
side facing away from mechanical structure, OK. Sorry.

                Gerard


On 8/11/2020 8:16 AM, Gerard Visser wrote:
> 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!SAQPx9Ri_U0LMsI-kJryuTi7kmQ5x9z2cuwXyVQr_mwgVrxl6XH6qVUc5nh1_agdRO6tNDw$  
> > <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
> >      > _______________________________________________
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