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[董家宁 <jndong AT sdu.edu.cn>]

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>
发送时间:2019-09-03 05:57:53 (星期二)
收件人: "Zhenyu Ye" <yezhenyu2003 AT gmail.com>
抄送: 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
Tel: +886-6-2757575 ext.65237
Fax: +886-6-2747995
Group Web: http://phys.ncku.edu.tw/~yiyang
+++++++++++++++++++++++++++++++++++++++++++++++++++

On Sat, Aug 31, 2019 at 3:48 PM Yi Yang <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
Tel: +886-6-2757575 ext.65237
Fax: +886-6-2747995
Group Web: http://phys.ncku.edu.tw/~yiyang
+++++++++++++++++++++++++++++++++++++++++++++++++++

On Fri, Aug 30, 2019 at 1:53 AM Zhenyu Ye <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> 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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