Star-tpc-l mailing list

[videbaek <videbaek AT bnl.gov>]

Dear Prashanth,
I think this amount of time for tpc maintenance needs to be discussed 
further. What you have is nominal 2 months, but with Thanksgiving and 
Christmas it is at least 2 weeks shorter. I suggest we have a meeting 
which includes Tonko, Tim, Alexi to discuss a more detailed planning. 
There was substantial damage to the electronics from the pp run that has 
to be addressed to have a successful Au-Au run

best Flemming




On 2024-10-14 14:15, Shanmuganathan, Prashanth wrote:
> Dear all,
>  I would like to start the shutdown operations meetings from Thursday,
> October 17th at 2:00 PM, during our usual time. Please use the regular
> STAR ops meeting coordinates provided below.
>  The shutdown will officially begin at 8:00 AM on Monday, October
> 21st. We will have Greg available for technical assistance throughout
> the week of 21st, and Bob will assist with magnet water draining and
> pole tip removal.
>  Schedule of Operations:
>
>         *
> On 21st, once the beam is dumped and the necessary pedestal runs are
> completed, the shift crew will bring the detectors to APEX mode.
>
>         * The magnet will be ramped down, and Prashanth will remove the
> magnet key.
>         * Subsystem experts will safely shut down their respective equipment
> for the extended shutdown.
>
>         *
> After the magnet is ramped down, Greg will remove the ground straps
> and barriers around the magnet. This task should take approximately
> one hour.
>         *
> Akio will remove the BBC on Monday morning.
>         *
> The EPD crew will remove the EPD on Monday, with plans to finish
> within the day. To accommodate this, we will perform tasks 2, 3, and 4
> in parallel where feasible.
>         *
> Alexei will purge the TPC, TOF, MTD, and GMT subsystems. The shift
> crew will remain on-site until Alexei provides clearance to dismiss.
>         *
> Prashanth and David will purge the sTGC gas system, aligned with the
> TPC purge timeframe.
>
>         *
> Tim will remove the sTGC ROB box from the west pole tip between
> Monday(21st) and Wednesday(23rd). Prashanth removes sTGC HV cables.
>         *
> STSG and CAD MTechs will drain the magnet water and blow out the coils
> on Wednesday(23rd). In the morning Jameela will coordinate with CAS
> and water group to shutdown the magnet water.
>         *
> STSG and CAD MTechs will remove the east pole tip on Friday(25th) and
> the west pole tip on Monday(28th).
>         *
> STSG and carpenters will install the east and west scaffolding on
> Tuesday(29th).
>
>         * TPC/iTPC maintenance will begin on Wednesday, October 30th, and is
> expected to continue until the first week of January.
>         *
> The shutdown is estimated to last 4 to 5 months, although this has not
> been officially confirmed. If the shutdown is not significantly
> extended, we will begin preparations for the next run in the second
> week of January.
>
>  Please let me know if I have missed any items or any suggestions.
>  Thanks,
>  Prashanth
>
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>
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--
Flemming Videbaek
senior scientist, emeritus
videbaek @ bnl.gov
Brookhaven National Lab
Physics Department
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Upton, NY 11973

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