sPHENIX discussion of the superconducting solenoid

["O'Brien, Edward" <eobrien AT bnl.gov>]

    Hi Kin,
     OK. Let me discuss this with Glenn. If we were confident that
    the new Quench Detection System would be complete by Fall 2021
     then the decision would be easy and we would make the change
    in the P6 schedule. However I don't know how to evaluate the likelihood
    of the new quench detection system remaining on schedule for a Fall 2021
    completion.  I tend to prefer the safer route of planning that we use the existing
    quench detection system in the P6 schedule. We would update the plan
    a year from now, if it looked like we were on schedule for the new detection system.

    Ed

On 9/18/2019 12:17 PM, Yip, Kin wrote:

Hello Ed, Glenn and Irina,

After our last scheduling, Carl and I have gone to talk with the relevant people including Jon Sandberg, Don Bruno and Charlie Theisen.
We've just had an almost one-hour meeting with all of us (plus another engineer T. Samms).

(1) We've determined that the existing Quench Detection system that used in the High-Field Test (2018) is sufficient to protect the sPHENIX Magnet
(since we have tested !).   There are just a couple inconvenience (such as file transfer and remote control) that Charlie Theisen has promised (and he's
confident) to give us a solution so that we'll have the quench file remotely, instead of having to put a jump stick to the quench detector in 1008B to
download the quench file.

(2) Jon Sandberg et. al. said that they had not put enough priority on the new quench so far.  But since our discussion, they've re-evaluated their schedule
and they'll put more effort to it.  But it's unlikely that the new quench detection system will be available in Fall 2020, but their best estimate right now
is that it'll be completed by Fall 2021 (before G. Ganetis and W. Louie retired --- part of their motivation).   Jon said that he would convey the urgency
to Thomas Roser.   Ed/Glenn, you may do so in the Bill Christie meeting (every Monday).


So, the reality is that if the new quench detector is not ready by 2021 due to new sudden priorities (eg. C-AD is told to go ahead with eRHIC by DOE in a
few months), we'll have to rely on the existing quench detectioin system (that we've used in the High-Field Test).

We either can treat this as a done-deal that it'd look good on the schedule;

Or for the items (roughly speaking) 305200 - 306310 in the P6, we have to push the year from dd-mm-2020 to dd-mm-2021. 

Kin

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