Condition monitoring for a neutral beam injector cryopumping system

N. Wright*, R. Dixon, R. Verhoeven

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)


For neutral beam injection systems, the maintenance of a vacuum inside the injector box is essential for normal operation. Cryogenic pumping systems are often used to create and maintain this vacuum. Cryogenic pumping systems have been deployed on the neutral beam heating systems supporting the Joint European Torus. With these as a target application, the development of a condition monitoring scheme is presented. The scheme uses a residual generation approach. A bank of Kalman filters is used to estimate measured process variables. A residual evaluator is used to map residual signals onto a set of faults. Two example faults are simulated to demonstrate the response of the scheme. This paper contributes to the wider fusion development programme by demonstrating how a contemporary condition monitoring technique can be applied to a fusion support system, in order to improve its availability.

Original languageEnglish
Pages (from-to)1236-1239
Number of pages4
JournalFusion Engineering and Design
Issue number6-8
Publication statusPublished - 11 Mar 2013


  • Condition monitoring
  • Cryopumping
  • Fault detection
  • Fault isolation
  • Joint European Torus
  • Residual generation

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Nuclear Energy and Engineering
  • Materials Science(all)
  • Mechanical Engineering


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