Dynamic compensation of an rf cavity failure in a superconducting linac

An accelerator driven system (ADS) for transmutation of nuclear waste typically requires a 600 MeV–1 GeV accelerator delivering a proton flux of a few mA for demonstrators, and of a few tens of mA for large industrial systems. Such a machine belongs to the category of the high-power proton accelerat...

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Bibliographic Details
Published in:Physical review special topics. PRST-AB. Accelerators and beams 2008-07, Vol.11 (7), p.072803, Article 072803
Main Authors: Biarrotte, Jean-Luc, Uriot, Didier
Format: Article
Language:English
Subjects:
Accelerator Physics
Accelerators
Fault tolerance
Holes
Linear accelerators
Nuclear Experiment
Physics
Proton accelerators
R&D
Radioactive wastes
Reliability
Research & development
Superconductivity
Thermal stress
Transmutation
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Summary:An accelerator driven system (ADS) for transmutation of nuclear waste typically requires a 600 MeV–1 GeV accelerator delivering a proton flux of a few mA for demonstrators, and of a few tens of mA for large industrial systems. Such a machine belongs to the category of the high-power proton accelerators, with an additional requirement for exceptional “reliability”: because of the induced thermal stress to the subcritical core, the number of unwanted “beam trips” should not exceed a few per year, a specification that is several orders of magnitude above usual performance. In order to meet this extremely high reliability, the accelerator needs to implement, to the maximum possible extent, a fault-tolerance strategy that would allow beam operation in the presence of most of the envisaged faults that could occur in its beam line components, and in particular rf systems’ failures. This document describes the results of the simulations performed for the analysis of the fault-tolerance capability of the XT-ADS superconducting linac in the case of an rf cavity failure. A new simulation tool, mixing transient rf behavior of the accelerating cavities with full 6D description of the beam dynamics, has been developed for this purpose. Fast fault-recovery scenarios are proposed, and required research and development is identified.
ISSN:1098-4402
1098-4402
2469-9888
DOI:10.1103/PhysRevSTAB.11.072803