Speaker
Bertrand Baudouy
(CEA Saclay)
Description
For long term missions in deep space, a large superconducting toroid magnet to protect astronauts from ionizing radiations coming from Galactic Cosmic Ray is under studied in the frame work of the Space Radiation Superconducting Shield (SR2S) European project. This magnet is made of Titanium clad MgB2 superconductor to afford a bending power greater than 5 T.m at a cryogenic temperature of 10 K. A specific cryogenic system, combining both space and terrestrial technologies, is designed to cool down this 10 m long and 12 m diameter magnet.
Two different types of cooling have been studied to maintain the superconducting magnet at 10 K. A V-groove sunshield is considered around the external side of the magnet to reduce the heat fluxes coming from the sun or planets. To optimized V-groove sunshield, several numerical simulations have been performed using surface-to-surface radiation solver from Fluent© CFD. The following parameters have been considered: number of layers, angle between multi-layer Insulation…
To complete this design, pulse tube cryocoolers will be used to absorb the heat fluxes coming from the human habitat attached to the magnet. They will be linked on their first stage to the magnet and on their second stage to the surface of an 80 K thermal shield. Long cryogenic Pulsating Heat Pipe (PHP), using nitrogen as a working fluid, are pursued to be used as thermal link at the surface of the 80 K thermal shield. The cool down of the entire magnet, as a function of weight and possible material, is also presented when assembled in orbit or in case of quench in deep space.
Author
romain bruce
(CEA Saclay)
Co-author
Bertrand Baudouy
(CEA Saclay)
