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Re: [Star-fst-l] Notes from review and action items
- From: Gerard Visser <gvisser AT indiana.edu>
- To: nie <nie AT rcf.rhic.bnl.gov>
- Cc: star-fst-l AT lists.bnl.gov
- Subject: Re: [Star-fst-l] Notes from review and action items
- Date: Thu, 6 Aug 2020 09:07:18 -0400
Hi Maowu,
I mean, let's find a small connector (preferably a 1-pin connector, but I guess you could use a 2-pin connector too with just 1 pin used probably). Of course there is not much room on the T-board so it has to be pretty small.
Another approach would be as you say, to add a wire hole on the T-board and solder a short wire there and then we use a wire-to-wire pluggable connector. For the T-board design this is probably easier. The disadvantage is that we have another thing besides the purple cable hanging from the assembled T-board, which makes it a little harder to handle (perhaps). It should be ok though.
Before my earlier message I looked quickly for a good connector to suggest using; I didn't find a good one yet. For a wire to wire connector we can use a standard D connector contact; Mike and I can find a good one and get some ordered. Maybe this is the better plan.
If we are doing it this way, let's add *2* wire holes to ground on the T board. Perhaps we only use one of them, but no harm to have two. There are two things to ground (the aluminum ring and the cooling pipe).
The hole diameter should be made appropriate for a wire size 24 AWG I
think.
Sincerely,
Gerard
p.s. Someone will have to find some kind of spring clip that fits over the cooling tube to make contact to it... Or some other way to make contact to it. If we are lucky, maybe a standard fuseholder clip could work? Just a guess.
On 8/6/2020 1:49 AM, nie wrote:
Hi Gerard,
I discussed with Jianing today. If we understand correctly, what you mean is to add a ground wire which is pluggable. But we are confused about how to make the wire pluggable? Do you mean to add another ground hole?
Thanks,
Maowu
在 2020-08-05 12:00,Gerard Visser 写道:
hi Maowu,
Can you think about how we might best add a single wire pluggable
connection to the T-board? This would be used to make a ground
connection to the "ring" and the cooling tube, which was discussed in
the review. I think this is probably best done locally to the ground
on T-board, rather than with an extra ground wire running all the way
out to the PPB ground. But of course, it needs to be pluggable; we
need a (small, of course) part to put on the T-board and a mating part
to solder to 24AWG wire.
Sincerely,
Gerard
p.s. Also, wasn't there a need to modify the screw holes (so that the
T-board can be fastened to structure despite a little variation in
where the outer hybrid's connector is relative to the structure)? I
don't have any details on that though.
On 8/4/2020 11:07 PM, nie wrote:
Hi Zhenyu,
Thanks for the information.
Regards,
Maowu
在 2020-08-05 11:00,Ye, Zhenyu 写道:
Hi Maowu,
It is the outer section side of the T-board that has conflict.
Zhenyu
On Aug 4, 2020, at 9:58 PM, nie <nie AT rcf.rhic.bnl.gov> wrote:
Hi Zhenyu,
I think we all agree to move the capacitor to the other side at current stage.
Can you provide more information about the conflict? Like top layer or bottom layer?
These information will be helpful for us.
Thanks,
Maowu
在 2020-08-04 23:55,Gerard Visser 写道:
hi Zhenyu,_______________________________________________
A few comments below. Thanks,
Gerard
On 8/4/2020 11:48 AM, Ye, Zhenyu wrote:
Dear all,We may expect there will be air pockets. What is the action to take?
I think the review went smoothly yesterday. Thanks for all the hard work. I think we were able to answer most of the questions from the committee and also received very helpful suggestions from them. The committee is now working on the report, which will be distributed later this week.
Below are some notes I took from the review. Please feel free to comment or add.
*************************************
Mechanical structure:
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
Are we expecting to develop some criteria on where there must not be
air pockets, or on size of air pockets?
Add an explicit step in the document/traveller to clean the flux after components mounting on the hybridAlso, see below.
Add details about criteria of acceptance/rejection into traveller
Send bare modules to US as soon as they are produced and certified
T-board:
Check the updated T-board design as soon as new T-boards are produced
Module assembly/test at FNAL/UIC:We should probably do this by a local connection to the T-board. Let's
Find a better (clear) way to present the efficiency and clarify the KPP requirements
Optimize the production plan to create float: have two production lines, start module assembly with APV chips when the bare modules are available
Mechanical integration:
Find out the flatness requirement for mounting modules onto the support structure?
Define the tolerance requirement for installation and survey
Ground the cooling tube and supporting structure
identify a suitable way and add this possibility in T-board revision
which is happening anyway now. It was done similarly on IST I believe
(actually on hybrid there but T-board more appropriate here in FST I
think, certainly because the hybrid designs should be considered
frozen now.
Add handles and pieces to the installation tooling to make it easier to grab if needed during installation_______________________________________________
*************************************
Below I also list the action items from previous weeks, as well some new ones which appear from the discussions in the last few weeks
*************************************
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) Design and fabricate module storage boxes for production at UIC - Xu/Andres
5) Duplicate the module assembly tooling at UIC - Xu/Zhenyu
6) Update the T-board design to avoid the conflict with Mechanical structure - Jianing
7) Look into the possibility to split the inner and outer sensor HV bias - Mike/Gerard/Jianing
8) Send the problematic prototype cable-T-board assembly to Mike for investigation - Zhenyu/Mike
9) Develop the QC procedure for Inner cable and T-board assembly - Mike/Maowu
10) Look into the overall large CMN noise, and the abnormal noise of few channels first appear in the readout - Gerard/Xu
11) Check the FST noise performance at high readout rate - Xu/Zhenyu
12) Sett up the laser test stand to characterize prototype module performance - Andres/Zhenyu
13) FST slow simulator with efficiency/resolution measured with prototypes and study tracking performance - Gavin/Shenghui
*************************************
Let’s discuss about all these at the FST meeting next Monday. Hopefully we will have the committee’s report by then.
https://drupal.star.bnl.gov/STAR/event/2020/08/10/star-forward-silicon-tracker-meeting Best,
Zhenyu
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-
[Star-fst-l] Notes from review and action items,
Ye, Zhenyu, 08/04/2020
-
Re: [Star-fst-l] Notes from review and action items,
Gerard Visser, 08/04/2020
-
Re: [Star-fst-l] Notes from review and action items,
nie, 08/04/2020
-
Re: [Star-fst-l] Notes from review and action items,
Ye, Zhenyu, 08/04/2020
-
Re: [Star-fst-l] Notes from review and action items,
nie, 08/04/2020
-
Re: [Star-fst-l] Notes from review and action items,
Gerard Visser, 08/05/2020
-
Re: [Star-fst-l] Notes from review and action items,
nie, 08/06/2020
- Re: [Star-fst-l] Notes from review and action items, Gerard Visser, 08/06/2020
- Re: [Star-fst-l] Notes from review and action items, nie, 08/06/2020
-
Re: [Star-fst-l] Notes from review and action items,
nie, 08/06/2020
-
Re: [Star-fst-l] Notes from review and action items,
Gerard Visser, 08/05/2020
-
Re: [Star-fst-l] Notes from review and action items,
nie, 08/04/2020
-
Re: [Star-fst-l] Notes from review and action items,
Ye, Zhenyu, 08/04/2020
-
Re: [Star-fst-l] Notes from review and action items,
nie, 08/04/2020
-
Re: [Star-fst-l] Notes from review and action items,
Gerard Visser, 08/04/2020
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