Star-fst-l mailing list

["Ye, Zhenyu" <yezhenyu AT uic.edu>]

Maowu, thanks for confirmation. 

There might be one small issue. The screws of the connectors on the T-board 
seem to be a little bit too long, so that it creates a small conflict with 
the module peek mechanical structure (MS). See page 3 in Xu’s presentation 
from last week’s FST meeting [1]. It seems to me that one can still press the 
T-board to fasten with the MS through the four corner holes. But the T-board 
and/or the MS has a tiny bend. As this observation is not fully consistent 
with what Yi reported in [2], I have asked Yi to check again. 

If the answer is yes, I see 3 options

1. Shorten the screws (I don’t think it is possible but Maowu please confirm)
2. Leave as is
3. Add a washer between T-board and MS

A related question for the group is whether we should use PEEK screws/nuts to 
use to fasten T-board onto MS, as pointed out in Yi’s slides. I don’t recall 
we have come to a conclusion at the meeting (?) but we should decide soon.

Please comment. 

Thanks, 
Zhenyu

[1] 
https://drupal.star.bnl.gov/STAR/system/files/FstModuleAssemblyFeb08Feb142021.pdf
[2] https://drupal.star.bnl.gov/STAR/system/files/20201123_FST_MS_YiYang.pdf


> On Feb 22, 2021, at 3:21 PM, Maowu Nie <maowu.nie AT email.sdu.edu.cn> wrote:
> 
> Hi Zhenyu,
> 
> Thanks for the reminder, we will work on it.
> 
> Regards,
> Maowu
> 
> 
>> On Feb 22, 2021, at 11:07 PM, Ye, Zhenyu <yezhenyu AT uic.edu> wrote:
>> 
>> Hi Maowu, Jianing, 
>> 
>> We have tested the new T-boards/purple cables in the readout and found no 
>> problem. 
>> Please go ahead with the T-board assembly and testing.
>> 
>> Best,
>> Zhenyu 
>> 
>>> On Nov 11, 2020, at 4:12 AM, Maowu Nie <maowu.nie AT email.sdu.edu.cn> wrote:
>>> 
>>> Hi Mike and Yi,
>>> 
>>> We just finished the QC test of the first 10 sets of T-board , and will 
>>> send them to you soon.
>>> 
>>> Please confirm the following address for you is correct or not:
>>> 
>>> 8 sets to Mike:
>>> Brookhaven National Laboratory, Shipping Department- Building 98 Upton, 
>>> NY 11973,
>>> Michael Capotosto, capotosto AT bnl.gov.
>>> 
>>> 2 sets to Yi:
>>> No.1 University Rd., East District, Tainan City, 70101
>>> National Cheng Kung University, Department of Physics, 
>>> Yi Yang
>>> 
>>> One thing I need to mention to you, the nuts in the connector have the 
>>> shedding risk.
>>> So when you do installation, please make sure the screw is well tightened.
>>> 
>>> Regards,
>>> Maowu 
>>> 
>>> 
>>> 
>>> 
>>> 
>> 
>> 
>