sPHENIX is a new detector at RHIC.

[David Morrison <morrison AT bnl.gov>]

    Dear sPHENIX collaborators,
    
    See below for an email from C-AD Chair Wolfram Fischer.  RHIC is
    currently down and experts will be assessing the damage over the
    coming days.  We expect we will have much more information to pass
    along soon.  In the meantime, we are proceeding with our
    commissioning efforts.
    
    Regards,
    Dave and Gunther

From: "Fischer, Wolfram" <wfischer AT bnl.gov>
Date: Tuesday, August 1, 2023 at 14:09
Subject: RHIC off with helium leak into valve box

Dear Haiyan and Dmitri,

about two hours ago we have developed a helium leak into a valve box after all the DX heaters fired.

Helium is presently venting building 1004B. Fire/Rescue responded to the ODH alarm.

No one was in the building when the helium leak developed, and the building is now secured 

and under watch until the helium leakage ends. We are unloading helium from the Blue ring

into cold Dewar's.

Warming up the valve box will likely take a few days before we can assess the damage inside. 

 

We may not be able to repair the valve box in time for a Run-23 continuation.

Replacement of a cold diode a few years ago took 19.5 days. 

 

          Wolfram

-- 
David Morrison  Brookhaven National Laboratory  phone: 631-344-5840
                Physics Department, Bldg 510 C    fax: 631-344-3253
                          Upton, NY 11973-5000  email: dave AT bnl.gov