Thermal Design of Refridgerated Hexapole 18 GHZ ECRIS HIISI
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. Retrieved from http://accelconf.web.cern.ch/AccelConf/ECRIS2014/papers/weommh04.pdf
© 2014 CC-BY-3.0 and by the respective authors.
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. ...
PublisherInstitute of Applied Physics of the Russian Academy of Sciences
Is part of publicationProceedings of ECRIS 2014 : the 21st International Workshop on ECR Ion Sources, ISBN 978-3-95450-158-8