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[Yi Yang <yiyang AT ncku.edu.tw>]

Dear Zhenyu,

Thanks a lot for the information. We will use the fluid flow from IST to do the simulation later. 

As mentioned in the previous email, you are correct, we do need the detailed design of the hybrid. We are using pure Kapton as the hybrid now, and the thermal conductivity is very bad (so the temperature on the chips is high). 

Cheers,

Yi

+++++++++++++++++++++++++++++++++++++++++++++++++++
Yi Yang, Assistant 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 Thu, Jan 31, 2019 at 11:28 PM Zhenyu Ye <yezhenyu2003 AT gmail.com> wrote:

Hi Yi,

Regarding the coolant fluid flow, For IST, it is 1 liter/min at 20 degree C for each pair of staves, and in total 24/2 = 12 liter/min for the entire system. A detailed description can be found at

https://drupal.star.bnl.gov/STAR/blog/yezhenyu/forward-silicon-tracker-cooling

One thing which may not have taken into account in the thermal simulation is the thermal conductive vias in the hybrid (see Figure 8 of arXiv:1404.0993). Jianing, do you include such vias in the FST hybrid following IST hybrid design, if so, can you please tell Yi their dimensions, locations, and quantities?

Best,
Zhenyu




> On Jan 31, 2019, at 8:07 AM, Yi Yang <yiyang AT ncku.edu.tw> wrote:
>
> Hi Zhenyu and all,
>
> Here is the short update on the supporting structure: Yi_HS_20190131_FST_Structure.pdf
> The bottom-line is that we can make the tube to be separated a bit further for the connector-b, so Li and Jianing won't need to change the design of the T-Board.
>
> Cheers,
> Yi
>
> +++++++++++++++++++++++++++++++++++++++++++++++++++
> Yi Yang, Assistant 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 Thu, Jan 31, 2019 at 5:06 AM Zhenyu Ye <yezhenyu2003 AT gmail.com> wrote:
> Dear all,
>
> We will skip this and next week's meetings. If you have any update, please send it to the list.
>
> Zhenyu
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