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[Zhenyu Ye <yezhenyu2003 AT gmail.com>]

Dear all

Costs of manpower and money need to be considered, but one bottom line is 
that we must have 3-4 cables ready for FST prototype module test before the 
end of January 2020 at the latest. 

Zhenyu

> On Dec 3, 2019, at 3:32 PM, Gerard Visser <gvisser AT indiana.edu> wrote:
> 
> hi Mike,
>       I think if we truly need more than two or so T-boards for first 
> tests, then this is indeed a sensible approach. Modifying two or three or 
> so, testing everything, making any further changes anywhere (T boards and 
> hybrids) if needed -- hopefully not -- infomed by _complete_ results 
> (pedestals/noise and cosmics) from that testing, and then going for 
> production would maybe be better. But I agree modifying many of the old 
> design doesn't make much sense.
>       Jianing, would the v3.0 layout be ready to fab, or more work needed 
> in your opinion?
> 
>       Gerard
> 
> On 12/3/2019 3:04 PM, Capotosto, Michael wrote:
>> Zhenyu/Gerard and all,
>> I just wanted to get a jump and get this suggestion out before the 
>> meeting. I've spoken with John Hammond regarding the modifications 
>> required to the current V2.1 T-Boards, and we agreed it will probably be a 
>> few hours of work per board - removing the duplicate components, and 
>> adding worst case ~8 jumper wires, some of which need to cross to both 
>> sides of the board.
>> If we create new gerbers to match the V3.0  T-Board schematic, we may be 
>> able to do a fast turn turnkey run. Getting approximate quotes from Sierra 
>> Circuits, who we've used for turnkeys before, it would be ~$2,600 to have 
>> 10 PCBs fabbed, and stuffed for an 8-day turn. If this is something that 
>> Jianing and Gerard wouldn't have time to work on, John believes he can 
>> make the changes to the gerbers directly, and send the files out, if 
>> Gerard approves the changes listed.
>> If we were to also make 10 "test stand cables" using the new "purple" 
>> cable, we would be looking at ~$2,400.
>> It would cost another ~$1,350 to attach these cables to the t-board.
>> This would all come to a total of $6,350. We may be able to get this price 
>> down a little bit if we got quotes from local fab houses as well, and by 
>> combining the job of making 10 "purple cable" assemblies and assembling 
>> them to the pcb - this is a rough number.
>> I believe this may be a good option - we would have the new revision of 
>> the board with no bodge wires, we'd be using the production cable and 
>> testing with its dielectric properties, etc., a better representation of 
>> the final product; but it may be a tight deadline if we need it by 
>> mid-January. If you think this is something we'd be interested in pursuing 
>> I can start requesting quotes and see if we'd be able to have more 
>> definite numbers by the meeting on Thursday.
>> Best,
>> Mike Capotosto
>> -----Original Message-----
>> From: Star-fst-l <star-fst-l-bounces AT lists.bnl.gov> On Behalf Of Ye, Zhenyu
>> Sent: Tuesday, December 3, 2019 1:00 PM
>> To: star-fst-l AT lists.bnl.gov
>> Subject: [Star-fst-l] Weekly FST meeting - 12/5/2019 9:30am BNL time
>> Dear all,
>> We will have a weekly FST meeting this Thursday 9:30am BNL time. The 
>> meeting agenda and bluejeans info can be found at 
>> https://drupal.star.bnl.gov/STAR/blog/yezhenyu/forward-silicon-tracker-weekly-meeting
>> 1. T-board and inner signal cable - Jianing Dong, Mike Capotosto, Gerard 
>> Visser
>> Gerard is reviewing the changes to v2.1 T-board suggested by Mike.
>> 2. Mechanical Structure - Yi Yang, Han-sheng Li
>> Updates on the status of mechanical structure fabrication and assembly, 
>> cooling soft tube compatibility test, and transportation box design
>> 3. Module Assembly at Fermilab - Zhenyu Ye
>> Updates on module assembly fixture/tooling design/fabrication
>> 4. Simulation: Te-Chuan Huang, Krishan Gopal
>> Updates from Te-Chuan on FST geometry modeling
>> If there is anything else to report/discuss, please let me know.
>> Best
>> Zhenyu
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