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

Benabderrahmane, C.; Berteaud, P.; Valléau, Mathieu; Kitégi, Charles; Tavakoli, Keihan; Béchu, Nicolas; Mary, Arnaud; Filhol, J.M.; Couprie, Marie-Emmanuelle

doi:10.1016/j.nima.2011.12.015

Cited by 54 publications

(17 citation statements)

References 19 publications

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“…Operation at lower gap (4.5 mm) is being studied as a means of increasing the flux of photons at high energy. In addition, the recent experimental results on magnets operating at cryogenic temperatures are very promising [43][44][45][46] in terms of gain in magnetic field. This option is in phase of discussion to further increase the flux at high photon energy.…”

Section: Discussionmentioning

confidence: 99%

In vacuum permanent magnet wiggler optimized for the production of hard x rays

Marcouillé

Béchu

Berteaud

et al. 2013

Phys. Rev. ST Accel. Beams

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A new concept of wiggler has been designed and realized at SOLEIL to produce high energy photons in low/intermediate electron storage rings. Instead of using the superconducting technology which requires new equipment and instrumentation, heavy maintenance, and additional running costs, we have proposed to build a compact in-vacuum small gap short period wiggler that operates rather at moderate field than at high field. The wiggler composed of 38 periods of 50 mm produces 2.1 T at a gap of 5.5 mm. The moderate value of the magnetic field enables one to limit the effects on the beam dynamics and to avoid excessive power and magnetic forces. In this purpose, the narrow magnetic system has been equipped with a counterforce device made of nonmagnetic springs. The roll-off resulting from the small size of poles has been compensated in situ by permanent magnet magic fingers. This paper reports the phases of design, construction, magnetic measurements, and on-beam tests of the in-vacuum wiggler WSV50.

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Section: Discussionmentioning

confidence: 99%

In vacuum permanent magnet wiggler optimized for the production of hard x rays

Marcouillé

Béchu

Berteaud

et al. 2013

Phys. Rev. ST Accel. Beams

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“…The quadrupoles are characterized using Radia magnetostatic code based on boundary integral method. Nd 2 Fe 14 B magnets are most commonly used due to their high remanent field and coercivity at room temperature [38][39][40]. The materials and quadrupole parameters are presented in Table 1.…”

Section: Halbach Structurementioning

confidence: 99%

Permanent Magnet-Based Quadrupoles for Plasma Acceleration Sources

et al. 2019

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The laser plasma accelerator has shown a great promise where it uses plasma wakefields achieving gradients as high as GeV/cm. With such properties, one would be able to build much more compact accelerators, compared to the conventional RF ones, that could be used for a wide range of fundamental research and applied applications. However, the electron beam properties are quite different, in particular, the high divergence, leading to a significant growth of the emittance along the transport line. It is, thus, essential to mitigate it via a strong focusing of the electron beam to enable beam transport. High-gradient quadrupoles achieving a gradient greater than 100 T/m are key components for handling laser plasma accelerator beams. Permanent magnet technology can be used to build very compact quadrupoles capable of providing a very large gradient up to 500 T/m. We present different designs, modeled with a 3D magnetostatic code, of fixed and variable systems. We also review different quadrupoles that have already been built and one design is compared to measurements.

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“…The beamline uses a 2 m-long cryo-cooled U18 Pr 2 Fe 14 B permanent-magnet prototype undulator (Benabderrahmane et al, 2012). At 10 keV, the produced X-ray source of elliptical cross-section has S v Â S h = 10 mm Â 265 mm r.m.s.…”

Section: X-ray Source and Thermal Power Managementmentioning

confidence: 99%

Optical design and multi-length-scale scanning spectro-microscopy possibilities at the Nanoscopium beamline of Synchrotron Soleil

et al. 2015

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The Nanoscopium 155 m-long beamline of Synchrotron Soleil is dedicated to scanning hard X-ray nanoprobe techniques. Nanoscopium aims to reach 100 nm resolution in the 5-20 keV energy range for routine user experiments. The beamline design tackles the tight stability requirements of such a scanning nanoprobe by creating an overfilled secondary source, implementing all horizontally reflecting main beamline optics, applying high mechanical stability equipment and constructing a dedicated high-stability building envelope. Multitechnique scanning imaging and tomography including X-ray fluorescence spectrometry and spectro-microscopy, absorption, differential phase and darkfield contrasts are implemented at the beamline in order to provide simultaneous information on the elemental distribution, speciation and sample morphology. This paper describes the optical concept and the first measured performance of the Nanoscopium beamline followed by the hierarchical lengthscale multi-technique imaging experiments performed with dwell times down to 3 ms per pixel.

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

Cited by 54 publications

References 19 publications

In vacuum permanent magnet wiggler optimized for the production of hard x rays

In vacuum permanent magnet wiggler optimized for the production of hard x rays

Permanent Magnet-Based Quadrupoles for Plasma Acceleration Sources

Optical design and multi-length-scale scanning spectro-microscopy possibilities at the Nanoscopium beamline of Synchrotron Soleil

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