Star-fst-l mailing list

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

Hi Gerard,

> On Aug 31, 2020, at 1:08 PM, Gerard Visser <gvisser AT indiana.edu> wrote:
> 
> hi Zhenyu,
>       Thanks - especially for nice detailed pictures.
>       The 'upper location' (IMG_0054.jpg) probably doesn't work since the 
> plastic tubing must overlap that region, that is where some kind of clamp 
> must be used to attach the tubing, I think. Yi, Rahul, what do you think 
> about that?
>       The 'lower location' seems fine to me, more so if that cable tie 
> isn't there since then the clip could clip in in the straighter place 
> (where the cable tie is now). That cable tie is not a permanent part of the 
> plan I guess, right? (Maybe some kind of a tie is needed up over the 
> section where the two plastic tubes connect on?
>       Does the clip fit snugly enough that you judge that we would have 
> reliable electrical contact there?

The opening angle of the clip is smaller than the tube and the clip is stiff 
to open. Because I did not want to put too much force on the tube, which is 
attached to the MS, I tried to increase the opening by bending the clip. I 
was able to put the clip onto the tube w/o much force but the clip does not 
attach firmly - it won’t move by itself but also it is easy to move onto the 
tube. I think there is a possibility to improve on bending the clip with more 
trials. 

 I guess you can assess it yourself when you visit UIC that we have planned 
for Sept 10. 

Zhenyu 

>       Yes I think for the wire to clip, we can solder that it will work 
> very nicely. Perhaps we'll drill a hole that the wire can pass through 
> (away from the soldering point) for extra strain relief, but I think anyway 
> it will be robust if we use good wire.
>       Sincerely,
> 
>               Gerard
> 
> 
> On 8/31/2020 1:47 PM, Ye, Zhenyu wrote:
>> Hi Gerard,
>> Please find some pictures taken with two pieces of Littelfuse # 01220087Z 
>> attached to cooling tube, in the attachment of the Drupal page
>> https://drupal.star.bnl.gov/STAR/event/2020/08/31/star-forward-silicon-tracker-meeting/follow-action-items
>> Both of them clamp onto the cooling tube where it is away from the MS: the 
>> top one is at a place between two connectors where the diameter of the 
>> tube is relatively smaller, while the other at a place where the diameter 
>> is relatively larger. I think it will work if we are going to use one of 
>> these places for detector installation. But it won’t work if we want to 
>> attach the Littelfuse # 01220087Z onto the tube where the tube is attached 
>> to MS.
>> How do you attach a wire to the Littelfuse # 01220087Z, by soldering?
>> Zhenyu
>>> On Wed, Aug 19, 2020 at 8:35 PM Ye, Zhenyu <yezhenyu AT uic.edu> wrote:
>>> Dear Gerard,
>>> 
>>> Thanks for looking into this. I ordered a few and will test it next week 
>>> after they arrive.
>>> 
>>> Zhenyu
>>> 
>>>> On Aug 18, 2020, at 8:56 PM, Gerard Visser <gvisser AT indiana.edu> wrote:
>>>> 
>>>> Dear Yi and Zhenyu,
>>>>       Could one or both of you please order some Littelfuse # 01220087Z 
>>>> (Mouser has stock, 84 cents each, 
>>>> https://urldefense.com/v3/__https://www.mouser.com/ProductDetail/Littelfuse/01220087Z?qs=*2Fha2pyFaduglErFCB38n3htdBYhndPrY4k2JWosNk8ORS1jEraEYXw*3D*3D__;JSUl!!P4SdNyxKAPE!V3xdOkTruG4VzRQirTwQLvHJK3hFVDssHTjK_gul0YsV3ws-wDDmrQl-94G_9KuV283L_mo$
>>>>   ) to evaluate for use in connecting the short ground wire from T-board 
>>>> to the cooling tube on each module?
>>>>       Nominally it is meant to give a nice solid electrical connection 
>>>> to a 1/4 inch fuse terminal, it shoud similarly snap nice and solidly 
>>>> onto the cooling tube. Hopefully there is a short straight place where 
>>>> it can be put.
>>>>       Sincerely,
>>>> 
>>>>               Gerard
>>>> 
>>>> 
>>>> On 8/17/2020 10:40 AM, Ye, Zhenyu wrote:
>>>>> Minutes:
>>>>> Integration:
>>>>> 1) Design and fabricate light-tight box for the DAQ integration test at 
>>>>> BNL - Rahul/Flemming
>>>>> -> Found a dark Box made of thick plastics. Will drill holes for cables 
>>>>> and decide how to fix the FST storage box in Nov.
>>>>> 2) Design the cooling lines, and cable trays between disks and cooling 
>>>>> manifold - Felix/Rahul
>>>>> -> Expect a presentation next week.
>>>>> 3) Cooling rack refurbishment and test - Rahul
>>>>> -> Flew NOVEC last Monday, but the system started tripping on Tuesday 
>>>>> but no interlock dropped. Will investigate.
>>>>> Mechanical structure:
>>>>> 1) Document the proposed changes to the mechanical structure - Yi
>>>>> -> Will do this week
>>>>> 2) Test and examine the new assembly procedure - Yi
>>>>> -> New jigs needed some changes. Done last Friday. May have the results 
>>>>> this week
>>>>> Hybrid/T-board/Inner Signal Cable/Patch Panel Board/Back of Crate Board:
>>>>> 2) Check how T-board would mount onto MS, and fix cables - 
>>>>> Jianing/Maowu/Mike/Gerard
>>>>> -> Rahul/Felix will give a presentation on cable fixing next week. Will 
>>>>> decide whether to keep or remove the four cable-tie holes on the T-board
>>>>> -> Maowu will follow up with Yi to see how to change the holes on the 
>>>>> corners of the T-board to slots
>>>>>  Production Module assembly:
>>>>> 1) Get updated quote from Hamamatsu - Zhenyu
>>>>> -> Done. Hamamatsu final quote and spec for production sensors.
>>>>> -> Flemming: request has been submitted to BNL procurement.
>>>>> -> Elke: Don't see why the order can not be placed this Month. Need 
>>>>> constant follow-up
>>>>> 2) Discuss with Fermilab about production module assembly schedule - 
>>>>> Zhenyu/Xu
>>>>> -> Zhenyu will provide the contact person info to Elke so that she can 
>>>>> ask for and understand the spendings on prototypes, and estimates for 
>>>>> the production
>>>>> Prototype Module test:
>>>>> 1) Gavin: compared different hit reconstruction threshold and time bin 
>>>>> requirements using data taking with FST03 (both inner and outer). Found 
>>>>> consistent results as FST01 (outer sensor only)
>>>>> Software:
>>>>> 1) Develop FST slow simulator to study tracking performance - 
>>>>> Gavin/Shenghui/Daniel
>>>>> -> Shenghui: no statistically significant difference in pT resolution 
>>>>> between fast and slow simulators. Will further check.
>>>>> 2) Prepare FST fast simulator code for Review - Shenghui
>>>>> -> Done.
>>>>> **** Action items ****
>>>>> Integration:
>>>>> 1) Design the cooling lines, and cable trays between disks and cooling 
>>>>> manifold - Felix/Rahul
>>>>> 2) Cooling rack refurbishment and test - Rahul
>>>>> 3) Installation procedure and tolerance requirements - Rahul/Yi/Zhenyu
>>>>> 4) Survey procedure and requirements - Rahul
>>>>> 5) Prepare documents for prelim safety review with C-AD - all
>>>>> Mechanical structure:
>>>>> 1) Document the proposed changes to the mechanical structure - Yi
>>>>> 2) Test and examine the new assembly procedure - Yi
>>>>> 3) Use thermal camera to check air bubbles for hybrid mounting - Yi
>>>>> 4) Add flux-cleaning step in the document - Yi
>>>>> 5) Document the mechanical structure and hybrid assembly QC criteria - 
>>>>> Yi
>>>>> Hybrid/T-board/Inner Signal Cable/Patch Panel Board/Back of Crate Board:
>>>>> 1) Update the T-board design to avoid the conflict with Mechanical 
>>>>> structure - Jianing/Maowu/Gerard
>>>>> 2) Check how T-board would mount onto MS, and fix cables - 
>>>>> Jianing/Maowu/Mike/Gerard
>>>>> 3) Look into splitting the inner and outer sensor HV bias - 
>>>>> Mike/Gerard/Christian
>>>>> 4) Send the problematic prototype cable-T-board assembly to Mike for 
>>>>> investigation - Zhenyu/Mike
>>>>> 5) Develop the QC procedure for Inner cable and T-board assembly - 
>>>>> Mike/Maowu
>>>>> Production Module assembly:
>>>>> 1) Discuss with Fermilab about production module assembly schedule - 
>>>>> Zhenyu/Xu
>>>>> 2) Design and fabricate module storage boxes for production at UIC - 
>>>>> Xu/Andres
>>>>> 3) Duplicate the module assembly tooling at UIC - Xu/Zhenyu
>>>>> Prototype Module test:
>>>>> 1) Look into the overall large CMN noise, and the abnormal noise of few 
>>>>> channels first appear in the readout - Gerard/Xu
>>>>> 2) Check the FST noise performance at high readout rate - Xu
>>>>> 3) Use the laser test stand to characterize prototype module 
>>>>> performance - Andres/Zhenyu
>>>>> 4) Test stand setup at BNL - Prithwish/Hu
>>>>> Software:
>>>>> 1) Prepare FST offline software - Shenghui/Xu
>>>>> 2) Detector slow control - Xu
>>>>> 3) Cooling system slow control - Prithwish/Hu
>>>>>> On Aug 14, 2020, at 9:42 PM, Ye, Zhenyu <yezhenyu AT uic.edu> wrote:
>>>>>> 
>>>>>> Dear all,
>>>>>> 
>>>>>> We will have the Weekly FST meeting on Monday starting at 9am EST (BNL 
>>>>>> local time).
>>>>>> 
>>>>>> Bluejeans Meeting URL https://bluejeans.com/101020434
>>>>>> Meeting ID: 101 020 434
>>>>>> 
>>>>>> https://drupal.star.bnl.gov/STAR/event/2020/08/17/star-forward-silicon-tracker-meeting
>>>>>> 
>>>>>> 0. follow-ups on review and action items *
>>>>>> 1. Integration                                                         
>>>>>>            by Rahul Sharma, Felix Archampong
>>>>>> 2. Hybrid, T-board                                                     
>>>>>>    by Maowu Nie, Gerard Visser
>>>>>> 3. Patch panel boards and ABC boards                       by Mike 
>>>>>> Capotosto, Gerard Visser
>>>>>> 4. Simulation Studies                                                  
>>>>>>   by Shenghui Zhang
>>>>>> 5. Prototype Module Test                                              
>>>>>> by Xu Sun, Gavin Wilks
>>>>>> 6. Mechanical structure                                                
>>>>>>  by Yi Yang
>>>>>> 
>>>>>> * 
>>>>>> https://drupal.star.bnl.gov/STAR/event/2020/08/17/star-forward-silicon-tracker-meeting/follow-review-and-action-items
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