RARE EARTH REGENERATOR MATERIAL PARTICLE, RARE EARTH REGENERATOR MATERIAL PARTICLE GROUP, AND COLD HEAD, SUPERCONDUCTING MAGNET, EXAMINATION APPARATUS, AND CRYOPUMP USING THE SAME
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United States of America Patent
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Nov 8, 2018
app pub date -
Jul 11, 2018
filing date -
Jul 11, 2018
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Abstract
A rare earth regenerator material particle and a regenerator material particle group having a high long-term reliability, and a superconducting magnet, an examination apparatus, a cryopump and the like using the same are provided. A rare earth regenerator material particle contains a rare earth element as a constituent component, and in the particle, a peak indicating a carbon component is detected in a surface region by an X-ray photoelectron spectroscopy analysis.
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