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sphenix-magnet-l - Re: [Sphenix-magnet-l] Magnet quenched at 6:58 pm (Crowbar Temperature Sensor ?)

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  • From: "Yip, Kin" <kinyip AT bnl.gov>
  • To: "O'Brien, Edward" <eobrien AT bnl.gov>, "sphenix-magnet-l AT lists.bnl.gov" <sphenix-magnet-l AT lists.bnl.gov>
  • Subject: Re: [Sphenix-magnet-l] Magnet quenched at 6:58 pm (Crowbar Temperature Sensor ?)
  • Date: Wed, 26 Oct 2022 06:17:00 +0000

Hi,

The inner and outer coils should have the same voltages (except a small correction due to their length difference...) and so there is a threshold set for the difference of the two coils.

This was probably the consequence of the "crowbar" problem that caused the fast discharge.


Kin



-------- Original message --------
From: Edward O'Brien <eobrien AT bnl.gov>
Date: 10/26/22 12:07 AM (GMT-05:00)
To: sphenix-magnet-l AT lists.bnl.gov
Subject: Re: [Sphenix-magnet-l] Magnet quenched at 6:58 pm (Crowbar Temperature Sensor ?)

    Hi Kin,
     What is the meaning of "coil difference"? Thanks.

    Ed

On 10/25/22 8:04 PM, Yip, Kin wrote:
Hi,

The Magnet quenched at 6:58 pm.  Rich (CAS) and went up to 1008B to check and it seems that the first one was due to "Crowbar Temperature Sensor".  I attach a picture of it.

The quench detector was triggered by "Coil Difference" which (to us) is more likely a consequence.  I also took a picture of it.

Too bad.  Rich and I think that we have to wait for Pablo to take a look tomorrow ... 😐

No more shift tonight and no shift for John Haggerty.

Kin



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