Development and operation of a Pr2Fe14B based cryogenic permanent magnet undulator for a high spatial resolution x-ray beam line
| Autor: | P. Berteaud, Pascale Brunelle, Fabien Briquez, Alain Lestrade, D. Zerbib, M. E. Couprie, M. Louvet, A. Somogyi, A. Mary, Mathieu Valléau, Fabrice Marteau, Christian Herbeaux, L. Chapuis, J.-L. Marlats, C. Kitegi, N. Bechu, Keihan Tavakoli, K. Medjoubi, Patrick Rommeluère, Oleg Chubar, C. Benabderrahmane, Olivier Marcouillé, Amin Ghaith |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Nuclear and High Energy Physics
Materials science Physics and Astronomy (miscellaneous) 010308 nuclear & particles physics Free-electron laser Synchrotron radiation Surfaces and Interfaces Undulator Coercivity 01 natural sciences 7. Clean energy Spectral line Beamline Magnet 0103 physical sciences Physics::Accelerator Physics Atomic physics 010306 general physics Storage ring |
| Zdroj: | Physical Review Accelerators and Beams. 20 |
| ISSN: | 2469-9888 |
| DOI: | 10.1103/physrevaccelbeams.20.033201 |
| Popis: | Short period, high field undulators are used to produce hard x-rays on synchrotron radiation based storage ring facilities of intermediate energy and enable short wavelength free electron laser. Cryogenic permanent magnet undulators take benefit from improved magnetic properties of ${\mathrm{RE}}_{2}{\mathrm{Fe}}_{14}\mathrm{B}$ (Rare Earth based magnets) at low temperatures for achieving short period, high magnetic field and high coercivity. Using ${\mathrm{Pr}}_{2}{\mathrm{Fe}}_{14}\mathrm{B}$ instead of ${\mathrm{Nd}}_{2}{\mathrm{Fe}}_{14}\mathrm{B}$, which is generally employed for undulators, avoids the limitation caused by the spin reorientation transition phenomenon, and simplifies the cooling system by allowing the working temperature of the undulator to be directly at the liquid nitrogen one (77 K). We describe here the development of a full scale (2 m), 18 mm period ${\mathrm{Pr}}_{2}{\mathrm{Fe}}_{14}\mathrm{B}$ cryogenic permanent magnet undulator (U18). The design, construction and optimization, as well as magnetic measurements and shimming at low temperature are presented. The commissioning and operation of the undulator with the electron beam and spectrum measurement using the Nanoscopmium beamline at SOLEIL are also reported. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|