Star-fst-l mailing list

[Zhenyu Ye <yezhenyu2003 AT gmail.com>]

> On Aug 12, 2020, at 8:08 AM, Gerard Visser <gvisser AT indiana.edu> wrote:
> 
> hi Mike,
>       I understand, and your solution seems fine though a bit more 
> confusing (at least looking a bit more confusing on the documentation). It 
> is a reasonable plan.
>       I think we should prepare one PPB and ABC board accordingly and they 
> should be tested in the UIC setup. Zhenyu, do you agree this is best?

Yes, sounds good to me.

Thanks,
Zhenyu

>       Sincerely,
> 
>               Gerard
> 
> 
> On 8/12/2020 8:43 AM, Capotosto, Michael wrote:
>> Hey Gerard, All,
>> If you're trying to find emails regarding this, it looks like Steve had me 
>> make the modifications in April or May of 2019.
>> When I did the modification I cut *and lifted* a section of track for 
>> OUT8P and OUT8N between those .1" pitch pads and the 50 pos d-sub - so we 
>> can't just bridge it, we'd have to scrape the mask off and lay two pieces 
>> of magnet wire in. It'd be rather labor intensive and time consuming to 
>> bring the PPB back to original.
>> I'd propose a simpler solution:
>>      1. We can remove the 28AWG jumpers installed in this picture 
>> https://drupal.star.bnl.gov/STAR/system/files/FST%20Modifications%20to%20IST%20Patch%20Panel%20Board_4APR19.png
>>      2. We bridge OUT8P and OUT10P, OUT8N and OUT10N on the PPB (8 and 10 
>> are adjacent, according to the silkscreen. They are a 0.1" pitch, so we 
>> can very easily bridge with a 1206 0R resistor)
>>      3. We make the modifications to the ABC board, using OUT10P/OUT10N 
>> for the second bias voltage.
>> Other than this, I'll get a quote or two for the current ABC boards, that 
>> should give us an idea of what it would cost if we wanted to do a respin 
>> with the added BNCs. I'll think about how best we can add the BNC pigtails 
>> as well.
>> --Mike
>> -----Original Message-----
>> From: Star-fst-l <star-fst-l-bounces AT lists.bnl.gov> On Behalf Of videbaek
>> Sent: Tuesday, August 11, 2020 4:41 PM
>> To: Gerard Visser <gvisser AT indiana.edu>
>> Cc: star-fst-l AT lists.bnl.gov
>> Subject: Re: [Star-fst-l] Weekly FST meeting, August 10 9am (BNL time)
>> Hi Gerard,
>> thanks for your input. I just want to remind all that we have a plan for 
>> checking out  the full chain with the system in November or so connecting 
>> to DAQ. We should take this opportunity to have mods done for a few boards 
>> so we can run and exercise a (test) module in the Hall.
>> best F.
>> On 2020-08-11 16:34, Gerard Visser wrote:
>>> hi Zhenyu & all,
>>>     I looked at all out schematics concerning the bias voltage
>>> connections and things should work out very well. We have to un-do the
>>> changes that we unfortunately made to all the PPB, which was not wise
>>> to have done before we had a final plan. But it should be feasible.
>>> And then we have to modify the ABC boards (18 of them) to cut two of
>>> the signal pairs from the ARM connector and instead wire to two new
>>> BNC conenctors (or to two cable pigtails to BNC connectors, would be
>>> OK). It would be possible to build 18 new ABC boards instead, but the
>>> D connectors if we use same high quality ones are rather expensive.
>>> Mike should please consider the pro/con for modification vs. new ABC
>>> boards.
>>>     Attached slides summarize the detector bias connections from the
>>> detectors to the BNC connectors. Mike please check that I didn't get
>>> something wrong, of course.
>>>     Let's call this decided, and get the PPB's back to their original
>>> state, and modify one or a few of the ABC boards for the test
>>> setup(s).
>>>     Sincerely,
>>> 
>>>             Gerard
>>> 
>>> p.s. We should hi-pot the bias connections (up to T-board, unplugged
>>> from the hybrids) to some test voltage that makes sense (TBD) based on
>>> maximum operating voltage you expect. What is that max operating
>>> voltage?
>>> 
>>> 
>>> On 8/10/2020 1:25 PM, Ye, Zhenyu wrote:
>>>> Minutes:
>>>> 
>>>> 1. Flemming showed a draft of committee recommendations. He will have
>>>> a meeting with the committee this afternoon. Expect to have a final
>>>> version soon.
>>>> 
>>>> 2. Silicon sensors
>>>> -> Zhenyu: requested for a new quote from Hamamatsu. Partial delivery
>>>> of Silicon sensors is not possible.
>>>> 
>>>> 3. Use thermal camera with cooling applied to the other side of the
>>>> mechanical structure to check if there is air trapped between hybrid
>>>> and MS
>>>> -> Yi: trying it this week. Consider doing this in production
>>>> 
>>>> 4. Update the T-board design
>>>> -> Jianing will update the design this week
>>>> 1) Move the capacitor to the other side
>>>> 2) Add two ground holes
>>>> 3) Tolerance for mounting T-board on the MS, taking into account the
>>>> constraint from connecting the outer hybrid
>>>> 4) Check mounting T-board on the MS -> Yi will do it at NCKU
>>>> 
>>>> 5. Split HV for inner and outer
>>>> -> Decided to split HV. Mike/Gerard will look into the changes to PPB
>>>> and back-of-crate boards
>>>> 
>>>> 6. Integration
>>>> -> Rahul: will do a tolerance analysis, taking into account the
>>>> clearance/project requirements but also what can be achieved by the
>>>> machine shop. Need to have a plan for survey and discuss with Survey
>>>> group
>>>> 
>>>> 7. Simulation
>>>> -> Gavin/Shenghui: slow simulator based on cosmic data is ready.
>>>> Trying to run the tracking code on RCF.
>>>> 
>>>> 8. Mechanical structure
>>>> ->  Yi: Han-Sheng leaving the project next week for PhD in US. Test
>>>> the new procedure with old hybrids. Will verify with the vendor about
>>>> changes to the precision pin: lead and pin lengths
>>>> 
>>>> ***** Action items *****
>>>> 1) Design and fabricate light-tight box for the DAQ integration test
>>>> at BNL - Rahul/Flemming
>>>> 2) Design the cooling lines, and cable trays between disks and
>>>> cooling manifold - Felix/Rahul
>>>> 3) Finalize how to mount modules onto the half-rings, and half-rings
>>>> onto support structure, and document the proposed changes to the
>>>> mechanical structure - Rahul/Yi/Zhenyu
>>>> 4) Survey procedure/requirements - Rahul
>>>> 
>>>> 5) Prepare documents for prelim Safety review with C-AD - all
>>>> 6) Get updated quote from Hamamatsu - Zhenyu
>>>> 7) Design and fabricate module storage boxes for production at UIC -
>>>> Xu/Andres
>>>> 8) Duplicate the module assembly tooling at UIC - Xu/Zhenyu
>>>> 9) Discuss with Fermilab about module assembly schedule - Zhenyu
>>>> 
>>>> 10) Update the T-board design to avoid the conflict with Mechanical
>>>> structure - Jianing/Maowu
>>>> 11) Check how T-board mount onto MS - Yi
>>>> 
>>>> 12) Look into splitting the inner and outer sensor HV bias -
>>>> Mike/Gerard
>>>> 13) Send the problematic prototype cable-T-board assembly to Mike for
>>>> investigation - Zhenyu/Mike
>>>> 14) Develop the QC procedure for Inner cable and T-board assembly -
>>>> Mike/Maowu
>>>> 
>>>> 15) Look into the overall large CMN noise, and the abnormal noise of
>>>> few channels first appear in the readout - Gerard/Xu
>>>> 16) Check the FST noise performance at high readout rate - Xu/Zhenyu
>>>> 17) Sett up the laser test stand to characterize prototype module
>>>> performance - Andres/Zhenyu
>>>> 18) FST slow simulator with efficiency/resolution measured with
>>>> prototypes and study tracking performance - Gavin/Shenghui
>>>> 
>>>>> On Aug 8, 2020, at 10:48 AM, 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/2020/08/10/star-forward-silic
>>>>> on-tracker-meeting
>>>>> 
>>>>> 0. follow-ups on review and action items
>>>>> 1. Integration                                                          
>>>>>         by Rahul Sharma, Felix Archampong
>>>>> 2. Hybrid and T-board                                                   
>>>>> by Maowu Nie, Jianing Dong
>>>>> 3. Simulation Studies
>>>>>    by Gavin Wilks, Shenghui Zhang, Daniel Brandenburg
>>>>> 4. Prototype Module Assembly and Test                       by Zhenyu
>>>>> Ye
>>>>> 5. Mechanical structure
>>>>>   by Yi Yang
>>>>> _______________________________________________
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>>>>> Star-fst-l AT lists.bnl.gov
>>>>> https://lists.bnl.gov/mailman/listinfo/star-fst-l
>>>> 
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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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