sPHENIX MAPS tracker discussion

["Liu, Ming Xiong" <mliu AT lanl.gov>]

Hi Grazyna, Camelia, Yuan, Jo and all,

One topic that I didn’t get time to bring up for discussion at today's 
meeting, and like to ask you all to think about:
 - what if we need to re-work on the assembled detector at BNL? Will we be 
ready? 

>From ALICE experience (see the following email), ITS has to rework on the 
>detector assembly several times during the surface commissioning and also at 
>installation. 
Well they have labs at CERN so it was not a big challenge, it could be 
different for MVTX.

My concern is that whether we can do the similar work  at BNL - open up the 
detector and replaced faulty components, could be cables or sensors etc.

Our current plan is to ship the fully tested MVTX half-detectors to BNL early 
2022, and we will have several months of time doing pre-installation 
commissioning, and hope nothing bad happens to the MVTX detectors. BUT, we 
need to be prepared for the worst, so my question is:
        - should we also ship all the assembly fixtures to BNL and setup a 
clean tent so that we can rework on the half-detectors if needed? Or we send 
the detector back to LBNL  to fix?
        - do the current assembly fixtures and procedure allow us to do such 
operation at BNL?  

Cheers,
Ming 
 
-----

 
Dr. Ming Xiong Liu
P-3, MS H846
Physics Division
 
Office: 505.667.7125
Mobile: 505.412.7396
Los Alamos National Laboratory
lanl.gov
 
 
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-- 

 

On 4/23/21, 12:19 PM, "stefania beole" <beole AT to.infn.it> wrote:

    Dear all,
    we would like to update you on the evolution of the plans for the IB 
installation.

    Unfortunately, today our experts found an issue on the DCTRL line on 
stave L2_09. 
    The installation procedure, which was expected to start next Monday, is 
then postponed.
    We’ll proceed with further detailed checks to understand the origin of 
the issue, then we'll replace the stave and proceed with the next 
installation steps.
    An updated planning will be announced once the analysis of the issue is 
concluded.

    Kind regards

    Antonello, Felix, Stefania