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[Zhenyu Ye <yezhenyu2003 AT gmail.com>]

Elke, Flemming, Gerard, Maowu, Mike, thanks for all the comments/suggestions. 

A newer version (v2) of the slides are uploaded. 

I will let Yi to answer the question on slide 5 by Elke " what you mean by 
good for ES&H”

Indeed, slide 14 is not useful for this review. The main message of this 
slide is that we have a design for mechanical support and integration 
currently under internal review. We will present the details to ESRC in a 
future review. 

Best
Zhenyu

> On Oct 16, 2020, at 11:56 AM, Aschenauer Elke-Caroline <elke AT bnl.gov> wrote:
> 
> Hi HI,
> 
> I have a couple of comments.
> 
> slide 5: one needs to define what you mean by good for ES&H, does this mean 
> already approved becuase of earlier us in STAR or what 
> side 7 is completely redundant, if you want to show it, but it in front of 
> slide 4
> slide 11: do we have a definition of the cable, meaning a link to the 
> vendor and webpage or …… just something which gives info
> 
> slide 14: is not very helpful for this review, as it does not say what 
> materials are used for the support structure and this review is not a 
> design review / safety review for this much more detail needs to be 
> provided.
> 
> Cheers elke
> 
> 
> 
>> On Oct 16, 2020, at 10:47, videbaek <videbaek AT bnl.gov> wrote:
>> 
>> HI ZHENYU
>> 
>> A FEW COMMENTS TO THE SLIDES.
>> Do you have the old report on the ESCR review for IST?
>> 
>> slide 9:
>> 
>> For the HV add the info on modules from the IST slides
>> (Iseg <100V, <1 mA, BNC if correct)
>> 
>> slide 11
>> Understand you are not finished- add flamability result
>> Doe we have the specs for the cable (Mike, Gerard?)
>> 
>> slide 14 bullet 3 to ESCR at later review
>> 
>> move slide 15 to backup
>> 
>> best Flemming
>> 
>> 
>> 
>> 
>> 
>> 
>> 
>> On 2020-10-15 23:02, Ye, Zhenyu wrote:
>>> Dear all,
>>> I have made some slides for the ESRC review next Monday (Slides on
>>> inner signal cable/T-board and summary are not finished). Your
>>> comments are welcome.
>>> https://drupal.star.bnl.gov/STAR/event/2020/08/24/star-forward-silicon-tracker-meeting/safety-pre-approval-materials
>>> Best,
>>> Zhenyu
>>> PS. Slides for IST safety review can also be found in the above webpage
>>>> On Oct 9, 2020, at 12:31 PM, Ye, Zhenyu <yezhenyu AT uic.edu> wrote:
>>>> Hi All,
>>>> We are asked by CAD to do a safety review for FST on Monday Oct 19 2pm. 
>>>> Meeting info will be sent later.
>>>> Zhenyu
>>>>> Begin forwarded message:
>>>>> From: pak <pak AT rcf.rhic.bnl.gov>
>>>>> Subject: Re: Pre-approval for STAR Forward Silicon Tracker materials
>>>>> Date: October 8, 2020 at 6:17:50 PM CDT
>>>>> To: "Ye, Zhenyu" <yezhenyu AT uic.edu>
>>>>> Cc: flemming videbaek <videbaek AT bnl.gov>, Robert Pak <pak AT bnl.gov>, Yi 
>>>>> Yang <yiyang AT ncku.edu.tw>
>>>>> Hello Zhenyu,
>>>>> I forwarded your e-mail from Sept. 3rd to the ESRC Chair (attached 
>>>>> below).  They asked for guidance from a materials specialist at CAD.  
>>>>> That person did not respond all this time, because they had surgery, 
>>>>> and are on medical leave.  The ESRC Chair asked their stand-in for 
>>>>> guidance, who suggested to have a review of the Si tracker.
>>>>> The slides should include an overview of the detector, with emphasis on 
>>>>> the hazards to personnel and hazards to equipment.  In my experience 
>>>>> with Si detectors, the first category is minimal.  The second category 
>>>>> has greater risks involved, because Si detector are relatively fragile 
>>>>> and can be potentially damaged if proper precautions are not taken.  Of 
>>>>> course you and Flemming are well aware of this from experience with the 
>>>>> HFT.  That is why I am confident you will be able to handle this 
>>>>> review.  Attached is an example from a similar review today.
>>>>> On 2020-10-08 17:56, Ye, Zhenyu wrote:
>>>>>> Hi Robert,
>>>>>> We asked for pre-approval of materials, not a full safety review. What
>>>>>> info should be included in the slides that the CAD would like to see?
>>>>>> Do you have examples that can share with us.
>>>>>> Thanks,
>>>>>> Zhenyu
>>>>>>> On 2020-10-08 17:27, pak wrote:
>>>>>>>> Hello Zhenyu,
>>>>>>>> The CAD representative standing in for the materials expert decided
>>>>>>>> they would like a review of the Si tracker.  That is a tentative 
>>>>>>>> time,
>>>>>>>> because it does not work for me.  Does it work for you?
>>>>>>>> Also, would you be available to give the presentation on Monday
>>>>>>>> instead?  It is a Lab Holiday, but that works for me.
>>>>>>>> Robert Pak
>>>>>>>>>> On Oct 7, 2020, at 9:00 AM, pak <pak AT rcf.rhic.bnl.gov> wrote:
>>>>>>>>>> Hello Zhenyu,
>>>>>>>>>> The ESRC Chair was OK, but he reached out to someone else at CAD.  
>>>>>>>>>> I pinged them both again for any final questions/comments.
>>>>>>>>>> Robert Pak
>>>>>>>>>> On 2020-10-07 09:45, Ye, Zhenyu wrote:
>>>>>>>>>>> Hi Robert,
>>>>>>>>>>> Is there any feedback from Chair of the Experimental Safety Review
>>>>>>>>>>> Committee at CAD?
>>>>>>>>>>> Thanks,
>>>>>>>>>>> Zhenyu
>>>>>>>>>>>> On Sep 4, 2020, at 6:29 AM, Ye, Zhenyu <yezhenyu AT uic.edu> wrote:
>>>>>>>>>>>> Robert, Thanks a lot for the help. Yes, indeed. We don’t think 
>>>>>>>>>>>> there is no issue with most of the materials we use for the 
>>>>>>>>>>>> Silicon Tracker, as they are commonly used in other Silicon 
>>>>>>>>>>>> detectors, but feel it would be better to run it across the 
>>>>>>>>>>>> safety before the production starts.
>>>>>>>>>>>> Best,
>>>>>>>>>>>> Zhenyu
>>>>>>>>>>>>> On Sep 4, 2020, at 5:42 AM, pak <pak AT rcf.rhic.bnl.gov> wrote:
>>>>>>>>>>>>> OK Zhenyu, I will forward this e-mail to the Chair of the 
>>>>>>>>>>>>> Experimental Safety Review Committee at CAD.  I really don't 
>>>>>>>>>>>>> see any issue.  That's one of the benefits of a Si detector, 
>>>>>>>>>>>>> relatively low safety hazard (spoken by someone who spent 9 
>>>>>>>>>>>>> years in Phobos and was recruited to build Si detectors in 
>>>>>>>>>>>>> PHENIX).
>>>>>>>>>>>>> Robert Pak
>>>>>>>>>>>>> On 2020-09-03 18:58, Ye, Zhenyu wrote:
>>>>>>>>>>>>>> Hi Rboert,
>>>>>>>>>>>>>> Yes, we are aware of the compatibility requirement of the 
>>>>>>>>>>>>>> cooling
>>>>>>>>>>>>>> tubes and NOVEC, and have selected two candidate tubes made of 
>>>>>>>>>>>>>> plastic
>>>>>>>>>>>>>> based on vendor’s recommendation.
>>>>>>>>>>>>>> The materials that we will use to build FST detector modules, 
>>>>>>>>>>>>>> cooling
>>>>>>>>>>>>>> tubes and cables, include
>>>>>>>>>>>>>> 1. Mechanical structure made of pure PEEK (not carbon fibre. 
>>>>>>>>>>>>>> See page
>>>>>>>>>>>>>> 3 of Ref [1])
>>>>>>>>>>>>>> 2. Cooling tubes embedded in each module made of Stainless 
>>>>>>>>>>>>>> steel
>>>>>>>>>>>>>> coated with Chroming (see page 3 of Ref [1])
>>>>>>>>>>>>>> 3. Cooing tubes connecting adjacent modules made of plastic 
>>>>>>>>>>>>>> (see page
>>>>>>>>>>>>>> 27 of Ref [1])
>>>>>>>>>>>>>> 4. Flexible PCB, made of Polyimide (see Ref [2])
>>>>>>>>>>>>>> 5. Glue and Thermal Grease used for Mechanical structure and 
>>>>>>>>>>>>>> flexible
>>>>>>>>>>>>>> PCB assembly (see page 3 of Ref [1])
>>>>>>>>>>>>>> 6. Electronic board, made of FR-4 (see Ref [3])
>>>>>>>>>>>>>> 7. Inner signal cable, the ones that Mike gave to you for 
>>>>>>>>>>>>>> Flammable test
>>>>>>>>>>>>>> 8. Glue used for mounting Silicon sensors and frontend readout 
>>>>>>>>>>>>>> chips,
>>>>>>>>>>>>>> but they are the same as we used for STAR Intermediate Silicon 
>>>>>>>>>>>>>> Tracker
>>>>>>>>>>>>>> (2014-2016). I suppose they are fine.
>>>>>>>>>>>>>> [1] 
>>>>>>>>>>>>>> https://indico.bnl.gov/event/9021/contributions/39989/attachments/29767/46442/20200803_FST_Mechanical_YiYang_v4.pdf
>>>>>>>>>>>>>> [2] 
>>>>>>>>>>>>>> https://drupal.star.bnl.gov/STAR/system/files/Datasheet%20for%20hybrid%20v3_0.pdf
>>>>>>>>>>>>>> [3] 
>>>>>>>>>>>>>> https://drupal.star.bnl.gov/STAR/system/files/Datasheet%20for%20T-Board%20v3_1_0.pdf
>>>>>>>>>>>>>> We are wondering what kind of info is needed for pre-approval 
>>>>>>>>>>>>>> before
>>>>>>>>>>>>>> we start the production.
>>>>>>>>>>>>>> Thanks,
>>>>>>>>>>>>>> Zhenyu
>>>>>>>>>>>>>>> On Sep 3, 2020, at 4:36 PM, pak <pak AT rcf.rhic.bnl.gov> wrote:
>>>>>>>>>>>>>>> Hello Zhenyu,
>>>>>>>>>>>>>>> I am aware of the flame test for FST cable.  What other 
>>>>>>>>>>>>>>> materials are specifically in question?  The detectors 
>>>>>>>>>>>>>>> themselves and carbon fiber support structure are benign.  
>>>>>>>>>>>>>>> Electronics boards are made of FR-4, which is a fire 
>>>>>>>>>>>>>>> resistant version of G10.  NOVEC cooling fluid is standard 
>>>>>>>>>>>>>>> stuff now.  What you should be concerned about is the 
>>>>>>>>>>>>>>> compatibility of your cooling tubes and NOVEC cooling fluid, 
>>>>>>>>>>>>>>> or leaks may develop over time.  Also there is triboelectric 
>>>>>>>>>>>>>>> charging (electrostatic build up) from the flowing NOVEC that 
>>>>>>>>>>>>>>> may introduce leaks, but these are not safety issues.
>>>>>>>>>>>>>>> Robert Pak
>>>>>>>>>>>>>>> On 2020-09-03 13:11, Ye, Zhenyu wrote:
>>>>>>>>>>>>>>>> Dear Robert,
>>>>>>>>>>>>>>>> This is Zhenyu from Univ of Illinois at Chicago. I hope you 
>>>>>>>>>>>>>>>> are doing well.
>>>>>>>>>>>>>>>> I am the STAR FST upgrade project manager.  As you may know, 
>>>>>>>>>>>>>>>> FST went
>>>>>>>>>>>>>>>> through a production readiness review recently and we are 
>>>>>>>>>>>>>>>> about to
>>>>>>>>>>>>>>>> start the detector module, electronic board/cable 
>>>>>>>>>>>>>>>> production. For this
>>>>>>>>>>>>>>>> we would like to get a pre-approval (not sure if this is the 
>>>>>>>>>>>>>>>> right
>>>>>>>>>>>>>>>> name) for the materials we are going to use.
>>>>>>>>>>>>>>>> I am wondering if you can tell me what kind of info we 
>>>>>>>>>>>>>>>> should prepare
>>>>>>>>>>>>>>>> for such a pre-approval review?
>>>>>>>>>>>>>>>> Thanks,
>>>>>>>>>>>>>>>> Zhenyu
>>>>>>> --
>>>>>>> Flemming Videbaek
>>>>>>> senior scientist
>>>>>>> videbaek @ bnl.gov
>>>>>>> Brookhaven National Lab
>>>>>>> Physics Department
>>>>>>> Bldg 510D
>>>>>>> Upton, NY 11973
>>>>>>> phone: 631-344-4106
>>>>>>> cell     :  631-681-1596
>>>> <Diamond Detector ASSRC Review 
>>>> 10-8-20.pdf>_______________________________________________
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>> 
>> -- 
>> Flemming Videbaek
>> senior scientist
>> videbaek @ bnl.gov
>> Brookhaven National Lab
>> Physics Department
>> Bldg 510D
>> Upton, NY 11973
>> 
>> phone: 631-344-4106
>> cell     :  631-681-1596
>> _______________________________________________
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