Speaker
Dr
Verena Kain
(CERN)
Description
For the last stage of the LHC injection process - extraction from the SPS, transfer
through the transfer lines TI 2 or TI 8 and injection into the LHC at 450 GeV - the
nominal intensities are over an order of magnitude above the equipment damage limit.
Equipment failures or wrong settings resulting in beam loss will therefore cause
severe damage to the extraction region of the SPS, the transfer lines or the LHC.
Effective active (interlock) and passive (collimator) machine protection is
essential. The protection level for various failures such as kicker erratics, power
converter faults, etc. has been investigated for beam 2 with particle tracking
including random machine and absorber setting imperfections. A full aperture model of
the transfer line and injection region was taken into account. The requirements for
active protection by surveillance of key equipment and passive protection (TCDI,
TDI-TCLI) in terms of protection setting are presented. Results for grouped failures,
where all magnet families trip which are connected to e.g. the same transformer, are
also discussed. The risk levels for damage of LHC equipment at injection are given.
Author
Dr
Verena Kain
(CERN)
