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[Aschenauer Elke-Caroline <elke AT bnl.gov>]

Dear Yi,

thanks for clarifying what GOOD means, but please keep in mind if these detectors are not at BNL it does not count, I think we should list in addition ot GOOD the BNL detector this material was used.

Thanks elke

On Oct 18, 2020, at 22:13, Yi Yang <yiyang AT ncku.edu.tw> wrote:

Hi all,

I am sorry for the delayed reply. I was away during the weekend. 

Good in ES&G means these materials are already widely used in detectors and Flemming is correct that two TBCs means that these two glues and thermal grease are needed to be approved by BNL. 

I would like to ask to add slide 9 from my Sept. 28 report which indicates that the thermal grease works fine after radiation test.

I would also like to confirm that all production works are strictly following the ES&H rues at NCKU and NTU (TiDC). 

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 Mon, Oct 19, 2020 at 3:28 AM videbaek <videbaek AT bnl.gov> wrote:

Hi

I looked at the most recent slides. I think most things are covered.

- The is no mentioning of the epoxy, encapsulation used at FNAL. I am
sure its ok.
- The TBC that Yi mentioned for MS is a two-component epoxy.The MSD only
has issues in regard to the
liquid phase, nothing mentioned on material after hardening.
- I would say using 36 (out of 72 IST cables)

my assessment, there may be more please add.

Also ES&H for production follows ES&H rues at institution (NCKY, FNAL,
BNL)

Equipment hazard:
-- Radiation damage of cooling lines (investigated)
-- Cooling failure interlocks (Was for IST)
-- power interlocked to STAR global interlocks

People hazard
-- none when installed
--

Flemming



On 2020-10-17 15:09, Aschenauer Elke-Caroline wrote:
> thanks for updating, looks nice, Yi indeed we need to know what you
> mean by good for ES&H
> this needs to be identified for Monday afternoon
>
> Cheers elke
>
>> On Oct 16, 2020, at 20:27, Zhenyu Ye <yezhenyu2003 AT gmail.com> wrote:
>>
>> 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
>  --
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senior scientist
videbaek @ bnl.gov
Brookhaven National Lab
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Upton, NY 11973

phone: 631-344-4106
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