sPHENIX MAPS tracker discussion

[mxliu <ming AT bnl.gov>]

Dear Miguel and Leo,

 

Do you know the resonance frequencies of MAPS wire bond? Although it was argued that it is not an issue for ALICE ITS, I think sPHENIX should reconsider this carefully since we are going to operate at lower trigger rate ~15kHz, compared to ALICE’s 50kHz/Continuous readout(~100kHz).

 

For the previous PHENIX pixel detector, the resonance frequencies range from 5~12 kHz, see the slides sent out by Eric.

 

Cheers,

Ming  

 

-- 

Ming Xiong Liu

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From: Miguel Arratia <marratia AT berkeley.edu>
Date: Tuesday, July 10, 2018 at 8:54 AM
To: "Ming Liu (BNL)" <ming AT bnl.gov>
Cc: eric mannel <mannel AT bnl.gov>, leo greiner <lcgreiner AT lbl.gov>, sPHENIX-MVTX <sphenix-maps-l AT lists.bnl.gov>
Subject: Re: [Sphenix-maps-l] Wire bonds in a magnetic field

 

Dear Ming,

 

Please find attached a presentation and report about the encapsulation study that I did with Leo,

best regards,

Miguel 

 

On Tue, Jul 10, 2018 at 6:08 AM Ming Liu <ming AT bnl.gov> wrote:

Hi Eric,
Thanks for the link.
Leo - you mentioned there is an ALICE document on this, could you send it if available?
Cheers
Ming

Sent from my iPhone

> On Jul 10, 2018, at 12:12 AM, eric mannel <mannel AT bnl.gov> wrote:
>
> There was discussion today on the vibration of wire bonds in a magnetic field as a result of pulsed signals.  Here  is a link to the PHENIX VTX study that concluded the need to encapsulate the VTX pixle/strip-pixel/FVTX wire bonds. I think I posted it on a "public" page that everyone can access, if you have problems let me know,
>
> The summary presentation: https://www.phenix.bnl.gov/phenix/WWW/publish/mannel/sPHENIX/ResultOfVibrationTest.ppt
>
> I am still searching for additional information/presentations and will post if found.
>
> Eric
>
> --
> Eric J. Mannel, Ph.D.
> PHENIX Group
> Physics Dept.
> Brookhaven National Laboratory
> 631/344-7626 (Office)
> 914/659-3235 (Cell)
>
> _______________________________________________
> sPHENIX-MAPS-l mailing list
> sPHENIX-MAPS-l AT lists.bnl.gov
> https://lists.bnl.gov/mailman/listinfo/sphenix-maps-l

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