sPHENIX discussion of the superconducting solenoid

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

 

 

From: Yip, Kin
Sent: Thursday, December 22, 2022 3:52 PM
To: Walker, Ronald <rwalker AT bnl.gov>; Costanzo, Timothy <tcostanzo AT bnl.gov>; Rosas, Pablo J <rosas AT bnl.gov>
Cc: Harvey, Margaret <pharvey AT bnl.gov>
Subject: RE: Power Supply to the Magnet was shut off on Nov. 14. You shut off something else on Dec. 8 ??

 

Hi Ron,

 

Thanks !  ( I called to talk with Ron for a couple minutes … )

 

So now, we understand completely what’s happened on Dec. 8.  ( From the Pump room website:

http://wsgserver.c-ad.bnl.gov/FTVP/ViewPoint.aspx?area=&cmd=%22Phenix%20PS%22&prev=Main&preparam=  , I see that the temperature is still 70+ F or so. )

 

Ron implied to me that he might turn those PLC/PSI back on again in the next week …

 

Kin

 

From: Walker, Ronald <rwalker AT bnl.gov>
Sent: Thursday, December 22, 2022 3:41 PM
To: Yip, Kin <kinyip AT bnl.gov>; Costanzo, Timothy <tcostanzo AT bnl.gov>; Rosas, Pablo J <rosas AT bnl.gov>
Cc: Harvey, Margaret <pharvey AT bnl.gov>; Walker, Ronald <rwalker AT bnl.gov>
Subject: RE: Power Supply to the Magnet was shut off on Nov. 14. You shut off something else on Dec. 8 ??

 

Kin,

 

The PLC and PSI were On and functioning after Nov. 14. This is the reason you continued to get water-cooled-buss temperatures.

On December 8^th, I shut down the PLC and PSI to lock out the breakers, so as to enter the supply.

This is the reason you no longer have temperature data.

 

Happy Holidays

Best,

 

Ron

 

From: Yip, Kin <kinyip AT bnl.gov>
Sent: Thursday, December 22, 2022 2:25 PM
To: Costanzo, Timothy <tcostanzo AT bnl.gov>; Rosas, Pablo J <rosas AT bnl.gov>
Cc: Harvey, Margaret <pharvey AT bnl.gov>; Walker, Ronald <rwalker AT bnl.gov>
Subject: Power Supply to the Magnet was shut off on Nov. 14. You shut off something else on Dec. 8 ??

 

Hi  Tim and Pablo,

 

We shut down the Power Supply on Nov. 14 (after your one-day) test.   I was the last one who left,

after Ron Walker shut off the power supply.

 

Please take a look at the water-cooled-bus water temperature.   The temperatures have been

~23 C or so until Dec. 8, 2022.

 

• All AC power is locked out in power supply, thermistors get there power from PS.

 

Do you understand this ?   Is it that you didn’t shut off something (PLC ? … but how can it be ) until

Dec. 8, 2022 ??

 

Kin

 

From: Costanzo, Timothy <tcostanzo AT bnl.gov>
Sent: Thursday, December 22, 2022 1:21 PM
To: Yip, Kin <kinyip AT bnl.gov>; Vogt, Lawrence <lvogt AT bnl.gov>; Karl, Robert F <rkarl AT bnl.gov>
Cc: Harvey, Margaret <pharvey AT bnl.gov>; Walker, Ronald <rwalker AT bnl.gov>
Subject: RE: Is water in : water-cooled-bus temperature running ?

 

Kin

 

All AC power is locked out in power supply, thermistors get there power from PS.

 

Tim

From: Yip, Kin <kinyip AT bnl.gov>
Sent: Thursday, December 22, 2022 1:13 PM
To: Costanzo, Timothy <tcostanzo AT bnl.gov>; Vogt, Lawrence <lvogt AT bnl.gov>; Karl, Robert F <rkarl AT bnl.gov>
Cc: Harvey, Margaret <pharvey AT bnl.gov>
Subject: Is water in : water-cooled-bus temperature running ?

 

Hi,

 

The water in the water-cooled-bus (WCB) for sPHENIX Magnet  should be running ?

I see water temp. ~ 0 ?

 

The magnet is not used but there is still water in (WCB) ?

 

Kin

 

 

 

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

From: "Harvey, Margaret" <pharvey AT bnl.gov>

Date: 12/22/22 10:52 AM (GMT-05:00)

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

Cc: "Rosas, Pablo J" <rosas AT bnl.gov>

Subject: Re: water-cooled-bus temperature ~0 ?

 

The scaling looks right to me.

The system should be warm now, correct?

 

Maybe something is disconnected or the sensor only operates over a certain range?

Whatever changed happen on 12/8 at 14:34.

 

I'm cc-ing Pablo, hoping that he can provide some info.

---

From: Yip, Kin <kinyip AT bnl.gov>
Sent: Thursday, December 22, 2022 10:37 AM
To: Harvey, Margaret <pharvey AT bnl.gov>
Subject: water-cooled-bus temperature ~0 ?

 

Hi,

 

I just try to check the water-cooled-bus water temperature.  It seems to be showing ~ 0 C.   I guess it's not, right ?  Need a FE reset or something ??

 

Kin