Nd₂Fe₁₄B and Pr₂Fe₁₄B magnets characterisation and modelling for cryogenic permanent magnet undulator applications

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• 作者：C. Benabderrahmane ; ^{chamseddine.benabderrahmane@synchrotron-soleil.fr} ; P. Berteaud ; M. Vallé ; au ; C. Kitegi ; K. Tavakoli ; N. Bé ; chu ; A. Mary ; J.M. Filhol ; M.E. Couprie
• 关键词：Permanent magnet ; Nd2Fe14B ; Pr2Fe14B ; Cryogenic permanent magnet undulator ; Insertion devices ; SOLEIL
• 刊名：Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
• 出版年：2012
• 出版时间：21 March 2012
• 年：2012
• 卷：669
• 期：Complete
• 页码：1-6
• 全文大小：1083 K

文摘

Cryogenic permanent magnet undulators take benefit from improved magnetic properties of RE₂Fe₁₄B (Rare Earth based magnets) at cryogenic temperatures for achieving short period high magnetic field. In particular, using Praseodymium instead of Neodymium generally employed for insertion devices avoids limitation due to Spin Reorientation Transition phenomenon. Magnetic properties of magnet samples (Nd₂Fe₁₄B and Pr₂Fe₁₄B) versus temperature have been investigated and applied to a 20 mm period Nd₂Fe₁₄B (BH50) and to a 18 mm period Pr₂Fe₁₄B (CR53) systems. Four period undulators have been built, characterised and compared to the models.