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[Gerard Visser <gvisser AT indiana.edu>]

hi Yi,
        It may be best to measure some.
	I'm a little skeptical the absolute errors for copper features over the longest 
distances on the hybrids are even only <200 um. Perhaps.
	Or was the question about the edges? Edges to edges may be more precise than 
copper to edges or copper to copper.
        Sincerely,

                Gerard


p.s. I don't recall this was any kind of problem for IST, where the hybrids were 
much larger. We should simply avoid relying on very tight tolerances for this.


On 9/3/2019 4:43 AM, Yi Yang wrote:
> Hi Jianing,
>
> Thanks a lot for the information.
> I think it would be tricky to have a 20 micros precision on the assembly if the 
> tolerances for hybrid and MS are 200 micros.
> (The tolerance on the MS is still to be confirmed.)
>
> 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.proofpoint.com/v2/url?u=http-3A__phys.ncku.edu.tw_-7Eyiyang&d=DwIDaQ&c=aTOVZmpUfPKZuaG9NO7J7Mh6imZbfhL47t9CpZ-pCOw&r=8ygAAI6gQzVe9hFCRdEAO5MwBJh2ID34fiwLpV3P1Xo&m=e26RiQzN2jnnMqYwXjgpqg9Dngalu_drY2U5zbon7JA&s=kTR2JuxdfQlYKBYfgrwHaQsh0pScMu9UsHY8dJfYYkE&e=  
> <https://urldefense.proofpoint.com/v2/url?u=http-3A__phys.ncku.edu.tw_-7Eyiyang&d=DwMFaQ&c=aTOVZmpUfPKZuaG9NO7J7Mh6imZbfhL47t9CpZ-pCOw&r=8ygAAI6gQzVe9hFCRdEAO5MwBJh2ID34fiwLpV3P1Xo&m=CEXibmXmYhaOm65gSn6sIrhSowJ2PKX26NqyPMmIGhs&s=0YfTsIpuBd2MVZARQMSgScEnrtcXyDTMUGZepKsqwDM&e=> 
>
> +++++++++++++++++++++++++++++++++++++++++++++++++++
>
>
> On Tue, Sep 3, 2019 at 4:31 PM 董家宁 <jndong AT sdu.edu.cn 
> <mailto:jndong AT sdu.edu.cn>> wrote:
>
>     Hi Yi,
>
>        The vendor told me that the tolerance of dimension is +/-0.2 mm.
>
>        Please let me know if you have any concerns.
>
>
>     Best,
>
>     Jianing
>
>
>         -----原始邮件-----
>         *发件人:*"Yi Yang" <yiyang AT ncku.edu.tw <mailto:yiyang AT ncku.edu.tw>>
>         *发送时间:*2019-09-03 05:57:53 (星期二)
>         *收件人:* "Zhenyu Ye" <yezhenyu2003 AT gmail.com
>         <mailto:yezhenyu2003 AT gmail.com>>
>         *抄送:* star-fst-l AT lists.bnl.gov <mailto:star-fst-l AT lists.bnl.gov>
>         *主题:* Re: [Star-fst-l] Weekly FST meeting - 8/29/2019
>
>         Hi Jianing,
>
>         I have been thinking about the alignment.
>         Could you please tell me the precision of dimension in Hybrid?
>         Thanks a lot.
>
>         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.proofpoint.com/v2/url?u=http-3A__phys.ncku.edu.tw_-7Eyiyang&d=DwIDaQ&c=aTOVZmpUfPKZuaG9NO7J7Mh6imZbfhL47t9CpZ-pCOw&r=8ygAAI6gQzVe9hFCRdEAO5MwBJh2ID34fiwLpV3P1Xo&m=e26RiQzN2jnnMqYwXjgpqg9Dngalu_drY2U5zbon7JA&s=kTR2JuxdfQlYKBYfgrwHaQsh0pScMu9UsHY8dJfYYkE&e= 
>         <https://urldefense.proofpoint.com/v2/url?u=http-3A__phys.ncku.edu.tw_-7Eyiyang&d=DwMFaQ&c=aTOVZmpUfPKZuaG9NO7J7Mh6imZbfhL47t9CpZ-pCOw&r=8ygAAI6gQzVe9hFCRdEAO5MwBJh2ID34fiwLpV3P1Xo&m=fvIZ0fWb8RBbg_zmSFDtZ2C5OHSi9Kzf-GQBVL-IicM&s=X8rakDqt8s-sSPYjZP4M1lN8t23SSQcSzZxhB8Hm5tg&e=>
>
>         +++++++++++++++++++++++++++++++++++++++++++++++++++
>
>
>         On Sat, Aug 31, 2019 at 3:48 PM Yi Yang <yiyang AT ncku.edu.tw
>         <mailto:yiyang AT ncku.edu.tw>> wrote:
>
>             Hi Zhenyu and all,
>
>             I talked to Jianing about the Nicomatic connectors she ordered. It
>             seems that the Chinese agents are not aware of the situation of 
> the
>             issue, so they will still ship them to Jianing on Sept. 11.
>             The plan is that Jianing will have a look and test them to see if
>             there is any obvious issue on that. If yes, I will send the
>             connectors I purchased for plan B to her and we will make a 
> further
>             decision.
>
>             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.proofpoint.com/v2/url?u=http-3A__phys.ncku.edu.tw_-7Eyiyang&d=DwIDaQ&c=aTOVZmpUfPKZuaG9NO7J7Mh6imZbfhL47t9CpZ-pCOw&r=8ygAAI6gQzVe9hFCRdEAO5MwBJh2ID34fiwLpV3P1Xo&m=e26RiQzN2jnnMqYwXjgpqg9Dngalu_drY2U5zbon7JA&s=kTR2JuxdfQlYKBYfgrwHaQsh0pScMu9UsHY8dJfYYkE&e= 
>             <https://urldefense.proofpoint.com/v2/url?u=http-3A__phys.ncku.edu.tw_-7Eyiyang&d=DwMFaQ&c=aTOVZmpUfPKZuaG9NO7J7Mh6imZbfhL47t9CpZ-pCOw&r=8ygAAI6gQzVe9hFCRdEAO5MwBJh2ID34fiwLpV3P1Xo&m=fvIZ0fWb8RBbg_zmSFDtZ2C5OHSi9Kzf-GQBVL-IicM&s=X8rakDqt8s-sSPYjZP4M1lN8t23SSQcSzZxhB8Hm5tg&e=>
>
>             +++++++++++++++++++++++++++++++++++++++++++++++++++
>
>
>             On Fri, Aug 30, 2019 at 1:53 AM Zhenyu Ye <yezhenyu2003 AT gmail.com
>             <mailto:yezhenyu2003 AT gmail.com>> wrote:
>
>                 Meeting minutes
>
>                 News - Zhenyu
>                 1) Adjustment of milestone timeline
>                 In accordance with module assembly schedule, we will move the
>                 completion of production module assembly by 2 months, and the
>                 others by 4 months
>                 2) Hamamatsu Silicon sensors
>                 Received 4+6 prototype sensors from Hamamatsu on Aug 22
>
>                 Hamamatsu sensor - Zhenyu, Andres
>                 1) Baby sensors
>                 continue measurements with 3 baby sensors. Low leakage current
>                 measured from 2 of them over extended period of time (2 
> weeks).
>                 The large leakage current increase seen with the InnerSensor
>                 Chip1 could be due to mis-handing during the measurement
>                 2) Prototype sensors
>                 By eye, the sensor shapes/sizes seem to match with those of 
> the
>                 hybrids. More detailed inspection will be done under 
> microscope.
>                 The IV/CV curves for inner sensors look reasonable, while 
> those
>                 for outer sensors look odd. Will study by measurements and
>                 simulation.
>
>                 Mechanical structure - Yi, Han-shen
>                 1) Cooling tube
>                 The cooling tube work is now in AIDC’s queue. 8 of them by the
>                 end of October
>                 2) Hybrid mounting
>                 Soldering will need to be done at ~200 degree C. Plan to do
>                 soldering first then gluing hybrids onto module structure. 
> Jigs
>                 are needed for aligning the hybrids w.r.t. module structure.
>                 Alignment by eye for initial mounting.
>                 3) Module holding frame
>                 Han-shen started working on the drawings
>
>                 Simulation - Te-Chuan, Krishan
>                 1) GEANT model
>                 Te-chuan is still working on implementing cooling tubes into 
> GEANT
>                 2) tracking study
>                 Krishan discussed results from Daniel’s tracking code and
>                 Te-chuan’s detector simulation.
>
>                 Action items:
>                 1) Jianing will contact the Nicomatic agent to understand
>                 (confirm) the possible issue with the connectors
>                 2) Jianing will find out the dimensions of the components on
>                 T-board so that Han-Shen can be included into CAD drawings
>                 3) Yi will check the compatibility of T-board and mechanical
>                 structure, seeing if there is a space to accommodate the
>                 components on the T-board. Maybe adding spacers
>                 4) Yi will find out from EASTON and AIDC the tolerance of the
>                 module structure and hybrid mounting
>                 5) Krishan will forward the instruction to run Daniel’s 
> tracking
>                 code, and understand the nHits requirement (true hit or 
> accept any?)
>
>                  > On Aug 27, 2019, at 1:31 PM, Zhenyu Ye
>                 <yezhenyu2003 AT gmail.com <mailto:yezhenyu2003 AT gmail.com>> 
> wrote:
>                  >
>                  > Dear all,
>                  >
>                  > We will have a meeting at 9am BNL time tomorrow (Thursday
>                 August 29). The meeting agenda and bluejeans info can be 
> found at
>                  >
>                  >
>                 
> https://drupal.star.bnl.gov/STAR/blog/yezhenyu/forward-silicon-tracker-weekly-meeting
>                  >
>                  > 1. News - All
>                  > 2. Hamamatsu silicon sensor - Zhenyu Ye
>                  > 3. Mechanical Structure - Yi Yang, Han-sheng Li
>                  > 4. Simulation - Te-Chuan Huang, Krishan Gopal
>                  >
>                  > Best,
>                  > Zhenyu
>
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>
>
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