Evaluate interlocks and SIS checks in case of use of dedicated beam processes for TL collimator jaw positions, TL and SPS optics to allow frequent switching
Topic information
Category
Decision mandatory before restart of LS2
Deadline
Speakers
TE-ABT BE-OP
Machines
LHC
Comments
dwollman

Hi,

I propose to postpone this a bit as nobody is working on it and there are no concrete plans either.

I once had a version that sort of worked, but not for fast switching. I removed it because the stupid TL FGCs kept filling all the SIS logs with stupid exceptions (over 90% of the log file content) and the equivalent of the beta* gap interlock for the TL collimators (since the optics ID from SIS was supposed to be used like beta* in the ring) was never implemented by STI. In part probably because Stefano did not care and did not push. Being useless I removed it.

This new idea means also essentially that we can decommission all the TL collimator BIS interlocks since the entire safe logic will be in SIS ;-), including jaw positions...

Cheers, Jorg

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