The conduction cooling of both a 6 T superconducting magnet along with a sample probe in a parallel configuration is addressed in this work. A Gifford-McMahon (GM) cryocooler is directly cooling the NbTi magnet, which aims to be kept at 4 K, while a gas-gap heat switch (GGHS) manages the cooling power to be diverted to the sample probe, which may be swept from 4 K up to 300 K. A first prototype of a GGHS was customized and validated for this purpose. A sample probe assembly has been designed and assembled with the existing cryogen-free magnet system. The whole test setup and components are described and the preliminary experimental results on the integration are presented and discussed. The magnet was charged up to 3 T with a 4 K sample space and up to 1 T with a sweeping sample space temperature up to 300 K while acting on the GGHS. Despite some identified thermal insulation problems that occurred during this first test, the overall results demonstrated the feasibility of the cryogen-free parallel conduction cooling on study.
|Article number||UNSP 012127|
|Journal||IOP Conference Series: Materials Science and Engineering|
|Publication status||Published - 2017|
|Event||26th International Cryogenic Engineering Conference / International Cryogenic Materials Conference - New Delhi, India|
Duration: 7 Mar 2016 → 11 Mar 2016
- Materials Science
Catarino, I., Soni, V., Kar, S., Barreto, J., & Martins, D. (2017). Feasibility study of parallel conduction cooling of NbTi magnet and sample probe in a cryogen-free magnet system. IOP Conference Series: Materials Science and Engineering, 171, [ UNSP 012127]. https://doi.org/10.1088/1757-899X/171/1/012127