Vitaly:
That is exactly why people on shift need instructions and guidance about each sub-system from the expurts as what to look for constantly and regularly in their shifts. It is good that you guys found it only after few days instead of weeks!
---------- Original Message ----------------------------------
From: vitaliy ziskin <vziskin@mit.edu>
Date: Fri, 27 Jun 2003 20:29:01 -0400
>Colleagues,
>I have a bad news. Zhenya today found out that the rack with the
>transition unit magnets' power supplies had tripped the circuit. I'm
>not sure exactly what happend, but it looks like the target magnets
>which are in the same rack stayed on. This makes sence since I think
>those power supplies are on a different circuit breaker.
>Anyway, I went back and checked at which point the magnets stopped
>flipping. It looks like it happened at 22:30 on the 25th of this month.
> All data after that is as good a unpolarized. Due to a low sensetivity
>in the compression tube we probably could not tell if the transitions
>were taking place. I suggest the a shift takers check that the hall
>probes in the transition units change thier value commensurate with the
>compression tube and target bits.
>
> Best regards,
>Vitaliy Ziskin
>
>
This archive was generated by hypermail 2.1.2 : Mon Feb 24 2014 - 14:07:29 EST