Star-fst-l mailing list

[LI YI <li.yi AT sdu.edu.cn>]

Dear All,

Here is a follow-up to yesterday's meeting.

1. Two biases for inner and outer hybrids:
The current T-board has two separate biases for inner and outer
hybrids. If we want to share bias between two hybrids, we can add a
jumper.

2. Two connectors (for inner and outer hybrids) on the same side of T-board:
During yesterday's meeting, it is suggested that it will be easier to
assemble T-board and hybrids if two connectors are on the same side.
Could anyone elaborate more why it is easier to assemble with the same
side connectors? It would be nice to evaluate the pros and cons
carefully before the final decision is made (due to 1. time constrains
see below, 2.the possibility of more layers, six layers instead of
current four, which may increase the complexity for manufacturing)

3. Production time:
T-board ~ 10 days
Hybrid ~ 2-3 weeks
Usually it takes more than one round to get it right by the vendor.
One round means that vendor produces it and we test and give feedback
to vendor. That means, it is likely to take at least 2 times 2-3weeks
= 4-6 weeks to give hybrid right and 2 times 10 days  = 20 days to get
T-board right.

Best,
Li

On Thu, Feb 14, 2019 at 7:06 AM Ye, Zhenyu <yezhenyu AT uic.edu> wrote:
>
> Dear all,
>
> We will have a meeting to discuss Forward Silicon Tracker tomorrow at 9am 
> BNL time. The meeting agenda and bluejeans info can be found at
>
> https://drupal.star.bnl.gov/STAR/blog/yezhenyu/forward-silicon-tracker-weekly-meeting
>
> Best,
> Zhenyu
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