Abstract
CERN is working on a new particle accelerator that will require a very large number of power converters. In that view, the reliability of the whole powering will be a major issue. The use of a redundancy and modularity may help increasing the overall machine availability. However, the reliability of the redundancy system must be high enough to add a significant improvement when compared to simple module systems. This paper suggests a comparative study of several modular and redundant configurations for optimising power converters reliability and draws some conclusion from what has been achieved in the LHC previous experience.
Highlights
CLIC (Compact Linear Collider) is an on-going study including CERN and several contributors which aim to build a new type of particle accelerator, aiming for energies that have never been reached so far
This paper suggests a comparative study of several modular and redundant configurations for optimising power converters reliability and draws some conclusion from what has been achieved in the Large Hadron Collider (LHC) previous experience
Based on CERN previous experience of redundant systems implemented in LHC, this paper has the purpose to give some directions to go for implementing future accelerator power systems
Summary
CLIC (Compact Linear Collider) is an on-going study including CERN and several contributors which aim to build a new type of particle accelerator, aiming for energies that have never been reached so far. Its principle relies on the energy transfer between a drive beam and the main beam in dedicated RF structures. The energy transfer system between the drive beam and the main beam will contain more than 40’000 magnets to be powered with individual dedicated currents. The amount of power converters would bring the overall mean time between failures to few hours only, a failure tolerant strategy using redundancy and/or modularity becomes compulsory [1,2,3,4,5]. When a module fails, its bypass must be ensured by a dedicated crowbar in the serial configuration, or by the opening of the circuit in a parallel configuration. The efficiency of the bypass is here defined by the probability of saving a failure by redundancy. Based on CERN previous experience of redundant systems implemented in LHC, this paper has the purpose to give some directions to go for implementing future accelerator power systems
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