Beams Document 1235-v1

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NUMERICAL SIMULATIONS AND ANALYSES OF BEAM-INDUCED DAMAGE TO THE TEVATRON COLLIMATORS

Document #:
Beams-doc-1235-v1
Document type:
Proceeding
Submitted by:
Alexandr Drozhdin
Updated by:
Alexandr Drozhdin
Document Created:
29 Jun 2004, 13:50
Contents Revised:
29 Jun 2004, 13:50
Metadata Revised:
02 Jun 2008, 17:30
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Abstract:
Numerical simulations are performed to analyze the Tevatron collimator
damage happened in December 2003 that was induced by a failure in the
CDF Roman Pot detector positioning during the collider run. Possible
scenarios of this failure resulted in an excessive halo generation and
superconducting magnet quench are studied via realistic simulations
using the STRUCT and MARS14 codes. It is shown that the interaction
of a misbehaved proton beam with the collimators result in a rapid
local heating and a possible damage. A detailed consideration is
given to the ablation process for the collimator material taking
place in high vacuum. It is shown that ablation of tungsten (primary
collimator) and stainless steel (secondary collimator) jaws results
in creation of a groove in the jaw surface as was observed after the
December's accident.
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