Thermal Design of Refridgerated Hexapole 18 GHZ ECRIS HIISI

Abstract
A project is underway for constructing a new 18 GHz ECR ion source HIISI at University of Jyväskylä. An innovative plasma chamber structure with grooves at magnetic poles for larger chamber radius at poles. The hexapole will be refridgerated to sub-zero temperatures to boost the coercivity and the remanence of the permanent magnet material and to allow the use of high remanence, low intrinsic coersivity permanent magnet materials. The hexapole structure is insulated from high temperature solenoid coils and plasma chamber by vacuum. The thermal design of the structure has been made using a thermal diffusion code taking in account radiative, conductive and convective heat transfer processes. The heat flux distribution from plasma has been estimated using electron trajectory simulations. The electron simulations are verified by comparing the distribution to plasma chamber patterns from 14 GHz ECR. Thermal design efforts are presented together with an analysis of the demagnetizing H-field in the permanent magnets.
Main Authors
Format
Conferences Conference paper
Published
2014
Subjects
Publication in research information system
Publisher
Institute of Applied Physics of the Russian Academy of Sciences
Original source
http://accelconf.web.cern.ch/AccelConf/ECRIS2014/papers/weommh04.pdf
The permanent address of the publication
https://urn.fi/URN:NBN:fi:jyu-201512294138Use this for linking
Parent publication ISBN
978-3-95450-158-8
Review status
Non-peer reviewed
Conference
Electron Cyclotron Resonance Ion Sources International Workshop
Language
English
Is part of publication
Proceedings of ECRIS 2014 : the 21st International Workshop on ECR Ion Sources
Citation
  • Kalvas, T., Tarvainen, O., Koivisto, H., & Ranttila, K. (2014). Thermal Design of Refridgerated Hexapole 18 GHZ ECRIS HIISI. In Proceedings of ECRIS 2014 : the 21st International Workshop on ECR Ion Sources (pp. 114-119). Institute of Applied Physics of the Russian Academy of Sciences. http://accelconf.web.cern.ch/AccelConf/ECRIS2014/papers/weommh04.pdf
License
CC BY 3.0Open Access
Copyright© 2014 CC-BY-3.0 and by the respective authors.

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