sPHENIX discussion of the superconducting solenoid

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

    Hi Kin,
     Congratulations to everyone on a very successful test of the sPHENIX
    magnet. We will restart the installation of the sPHENIX detector
    components tomorrow after this very productive pause to test and map the
    magnet. Thank you.

    Ed

On 11/14/22 6:41 PM, Yip, Kin wrote:

Hi,

Pablo Rosas' test has just completed.  ( We opened the contactors of dump resistor in 1008 so that we could go home 30+ minutes earlier. )   Today, Pablo didn't really work on "compensation" or change regulation.  He and his team have taken a lot 

of data for currents/voltages for the Power Supply and the Regulator, using his precise meter and a different logger, not found

in the data kept in LogView (which are routed through our quench-detector data chain and the PSI-ramp-control data chain).

Pablo cares more about the Power Supply information than most of us.

I've just informed the Cryo Control Room (and  I discussed with Roberto about the timing a few hours ago).  So, Cryo will shut the valve in 1008 to stop He supply from the RHIC ring and boil off the remaining He in 1008.  As a result, tomorrow Adrian Steinhauff can take off the ODH sign for 1008 --- we have discussed a couple times about this.    ( Roberto told me that for warming half of the RHIC ring, they'll do it up tomorrow as it requires 3 of them with a bit more works. )

Ron Walker is the one who has been baby-sitting the Power Supply in 1008B for the last several hours and he's also the on-duty CAS member tomorrow morning (from 5:30 am onwards).  He'll help Frank Toldo do the LOTO's to open the pole-tip doors tomorrow morning.

Kin

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