sPHENIX discussion of the superconducting solenoid

["Yip, Kin" <kinyip AT bnl.gov>]

Hi,

With Pablo and CAS, I did a quench test at 100A by setting a threshold to 0 V.  It didn't trip and heard the Contactor bang.

After that, we just finished ramping to the top current set point 4620.3 A which should represent 4596 A according to the DCCT.

Kin

-------- Original message --------

From: "Yip, Kin" <kinyip AT bnl.gov>

Date: 4/18/24 07:50 (GMT-05:00)

To: "Than, Yatming (Roberto)" <ythan AT bnl.gov>, "Van Kuik, Brian" <vankuik AT bnl.gov>, "Feder, Russell" <rfeder AT bnl.gov>

Subject: FW: Today's test/ramp

I hope/expect that you (the Cryo system) won’t notice anything about a 55 A crash (compared to our ~4600 A at the top).

 

Kin

 

From: Yip, Kin
Sent: Thursday, April 18, 2024 7:38 AM
To: Ho, Chung <chungh AT bnl.gov>; Pekrul, Winston <wpekrul AT bnl.gov>; Schoenfeld, Ralph <ralphs AT bnl.gov>
Cc: Schultheiss, Carl <carls AT bnl.gov>; Rosas, Pablo J <rosas AT bnl.gov>
Subject: Today's test/ramp

 

Hi,

 

After the pole-tip door test this morning, we should be ready to test the Power Supply and ramp up …  I’ll ramp the Magnet/Power Supply to 55 A and then change one of the 50 mV threshold to

0 V so that it should “crash”.   ( Chung Ho reminds me that in the ramp mode, < 50 A, the Labview won’t crash.  So, I have to go higher than 50 A. 😊  )

 

I type this so that you’re aware of what we are doing, in case we need help 😊

 

Kin