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["Capotosto, Michael" <capotosto AT bnl.gov>]

Hey Zhenyu and all, 

I will also be unable to attend the meeting this Monday morning, as I'll be 
in for an access to try and recover a failed TPX power supply cable. 

RE: PPB and ABC Boards: Christian, Gerard, and I had some discussions 
privately. We have a tentative plan for bringing in a second bias voltage to 
the T-boards. We will change the pins populated in the purple cable D-sub to 
use OUT10P, OUT10N instead of OUT8P, OUT8N. We will leave the PPBs as-is, 
with the modifications Steve ordered in-tact. We will not need to make any 
further modifications to the PPBs, or restore them to their original state - 
they can be used exactly as they are now. We will have to cut two pairs of 
tracks on the ABC board (the ones corresponding to OUT10P, OUT10N) between 
the DIN connector and the 0.1" pitch breakout holes in the ABC board. Then we 
can add the additional cable mount BNC connectors to bring in the new bias 
voltages.

Once we settle on final plans we'll draw it up and document it to present to 
the group. This shouldn't be an issue to have ready sometime by our meeting 
on the 24th. 

--Mike 

-----Original Message-----
From: Star-fst-l <star-fst-l-bounces AT lists.bnl.gov> On Behalf Of Gerard Visser
Sent: Sunday, August 16, 2020 5:29 PM
To: star-fst-l AT lists.bnl.gov
Subject: Re: [Star-fst-l] Weekly FST meeting, August 17 9am (BNL time)

Dear Zhenyu, Maowu, Jianing,
        I am sorry but there is an 'emergency' meeting I need to do for FCS 
on monday that conflicts with this, I will miss the meeting ahtough we do 
have to discuss importantly the T-board changes. Please let's do that by some 
emails.
        As far as I know, the thing which is needed to get the changes 
finished is a documentation of the position of the outer hyrbid connector in 
the plane of the T board w.r.t. the four mounting holes of the mechanical 
structure that the T-board mounts to. We need to know the basic dimensions of 
this and the tolerances (effective tolerances applying on all the accepted 
assemblies). I suppose it is for Yi to define, maybe in combination with 
Maowu and Jianing (since the tolerance includes the tolerance of placing 
locating features of the outer hybrid to the mechanical structure as well as 
the tolerance of the connector w.r.t the lcating features on the outer 
hybrid).
        I have no information about this. We certainly won't be able to 
finish the new T-board without this position and tolerance info. Let's 
discuss by email in next couple of days.
        Sincerely,

                Gerard


On 8/14/2020 10:42 PM, Ye, Zhenyu 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
> _______________________________________________
> Star-fst-l mailing list
> Star-fst-l AT lists.bnl.gov
> https://lists.bnl.gov/mailman/listinfo/star-fst-l
> 
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