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[nie <nie AT rcf.rhic.bnl.gov>]

Hi Gerard and all,

Thanks for the information.
We just finished the new design on T-board & hybrid.
The updated version can be found in the wiki page:
https://wiki.bnl.gov/star/index.php/Hybrid_and_T-board

I also make a summary slide which covers all the changes:
https://drupal.star.bnl.gov/STAR/system/files/20200814_hybrid%2526Tboard_redesign.pdf

Comments and suggestions are welcome.

Thanks,
Maowu&Jianing


在 2020-08-13 10:52，Gerard Visser 写道：
> hi Maowu and Jianing,
>         I think those four big holes don't really serve a purpose -- however
> I'd also say that we haven't seen all the details of how the cable
> will be routed and secured along the aluminum mounting ring so maybe
> it is premature to say these holes don't help.
>         It would be best to delete them if they really don't have a purpose.
>         The jumper can be deleted, the bias lines will not be tied together
> on T-board nor elsewhere. Let's delete the jumper.
>         The two new 24 AWG ground wire soldering holes, maybe should be in
> the right half of the board as seen in your picture? Is that feasible?
> I think it may work out a little neater if they are a little bit away
> from the cable wire holes. But we can consider any good options.
>         Sincerely,
>
>                 Gerard
>
>
> p.s. I am reminded from your picture that two of the four existing
> mounting holes for the T-board are very near an edge. When things are
> refigured as necessary to allow for the tolerance of position of the
> outer hybrid's connector, maybe this will be a problem and maybe the
> size of the T-board has to be increased a little along that edge. I
> hope that the requirements about the outer hybrid connector w.r.t. the
> four mount points on the mechanical structure for the T-board can be
> defined in a drawing soon?
>
>
>
> On 8/12/2020 10:16 PM, Maowu Nie wrote:
> > Hi all,
> >
> > We are working on the re-design of T-board now. We want to know if the 
> > four holes (red circle) are used or not. if not, Jianing plan to 
> > remove these holes, then we have more space to place two GND holes as 
> > Gerard suggested, and also we can move the jumper (J1) far away from 
> > the purple cable.
> >
> > The four holes are initially designed for fixing the purple cable, 
> > since they are not used, we suggest to replace them as GND holes.
> >
> > Please correct us if we are wrong.
> >
> > Thanks,
> > Maowu & Jianing
> >
> >
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