Sirius-Details of the New 3.2 T Permanent Magnet Superbend

Citadini, James; Vilela, Luana; Basilio, R.; Potye, M.

doi:10.1109/tasc.2017.2786270

Cited by 18 publications

(8 citation statements)

References 6 publications

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“…The deformation of the C-shaped yoke at the poles is estimated to be 0.020 mm, following a first calculation made during the design of the Superbend. Note that, for the assembly of the PMs, benefits from experience of the Sirius new Brazilian synchrotron light source were taken (Citadini et al, 2018), especially with regard to the conception of dedicated tools, which was a key point for the success of the project.…”

Section: Mechanical Designmentioning

confidence: 99%

Development of a custom-made 2.8 T permanent-magnet dipole photon source for the ROCK beamline at SOLEIL

Brunelle

Béchu

Briois

et al. 2023

J Synchrotron Radiat

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In August 2021, the SOLEIL storage ring was restarted after the summer shutdown with a new bending magnet made entirely of permanent magnets. Producing a magnetic field of 2.8 T, it replaced one of the 32 electromagnetic dipoles (magnetic field of 1.7 T) of the ring to allow the ROCK beamline to exploit more intense photon fluxes in the hard X-ray range, thus improving the time resolution performances of the beamline for experiments carried out above 20 keV. The reduction of the new dipole magnetic gap required to produce the higher field has led to the construction and installation of a new vacuum vessel. The realization of the new dipole with permanent magnets was a technological feat due to the very strong magnetic forces. The permanent-magnet assembly required dedicated tools to be designed and constructed. Thanks to accurate magnetic measurements, a precise modelization of the new dipole was performed to identify its effects on the electron beam dynamics. The first measurements carried out on the ROCK beamline have highlighted the expected increase in photon flux, and the operation performances remain unchanged for the other beamlines. Here, the major developments and results of this innovative project are described in terms of technology, electron beam dynamics and photon beam performance on the ROCK beamline.

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Section: Mechanical Designmentioning

confidence: 99%

Development of a custom-made 2.8 T permanent-magnet dipole photon source for the ROCK beamline at SOLEIL

Brunelle

Béchu

Briois

et al. 2023

J Synchrotron Radiat

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“…A Sirius 5BA cell is composed by 5 dipoles, four of which are electromagnetic and have a transversal field gradient, and the central dipole, BC, has a longitudinal field gradient and is based on a room temperature NdFeB permanent magnet. The BC high field peak reaches a maximum magnetic field of 3.2 T, in a minimum gap of 11 mm [2] and will delivery hard X-rays with critical energy of 19.15 keV (Figure 1, left) to the MOGNO beamline. The BC source has a beam size, at its center, of 22.1 x 8.5 µm² (FWHM).…”

Section: The Superbend Sourcementioning

confidence: 99%

“…The primary source is a 3.2 T permanent magnet dipole, with critical energy of 19.15 keV. Using a set of three elliptical mirrors, the beam is demagnified down to a nanometric focal spot size of ~120 x 120 nm 2 , which implies a divergent beam (~3 mrad in both directions). Therefore, MOGNO operates in a cone beam geometry, reaching a maximum field of view (FoV) of 85 x 85 mm 2 .…”

Section: Introductionmentioning

confidence: 99%

MOGNO, the nano and microtomography beamline at Sirius, the Brazilian synchrotron light source

Archilha

Costa

Ferreira

et al. 2022

J. Phys.: Conf. Ser.

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The MOGNO beamline is a high-energy imaging beamline dedicated to in situ and operando experiments in heterogeneous and hierarchical samples, and one of the beamlines of the first phase of SIRIUS, the 4th generation storage ring at the LNLS. The beamline is currently under commissioning and will operate at energies of 21.5, 39.0 and 67.7 keV, using as primary source a 3.2T permanent magnet dipole, with critical energy of 19.15 keV. The beam is demagnified down to a nanometric focal spot (≈120 nm) using a set of three elliptical mirrors, which introduces a divergence and, hence, the beamline operates in a cone beam geometry with variable field-of-view (FoV between 150 µm to 85 mm) and spatial resolution (≈120 nm to 55 |am). These conditions are reached with two end-stations, the nanotomography and the microtomography stations. A high-Z photon counting detector, with detection area of ≈85 x 85 mm2, will serve for both the nano and micro-station, but the beamline will also count on an indirect detection system based on a sCMOS camera and a macroscope.

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“…Today low emittance machines integrate superbends based on permanent magnets e.g. SIRUS [56], which provides a field of ≈ 3.2 T. For SLS-2 4 -6 T superbends are being looked into [57], [58], which are using superconducting coils. Design evaluations were made for superbends based on pole shoes made of Holmium, which are driven by a superconducting coil [59].…”

Section: A Magnet Assemblymentioning

confidence: 99%

Magnets for Low-Emittance Storage Rings an Overview

Schnizer

Bengtsson

2022

IEEE Trans. Appl. Supercond.

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Low emittance machines require lattices with many magnets of short length. Furthermore, successful lattices require strong gradients with strong dipole fields. These lattices are popular today, as MAX IV has demonstrated that a diffraction limited synchrotron light source can be based on such a lattice. This paper gives an overview of the various magnets used by the various diffraction limited light sources -available, under construction or designed. It compares the different magnet design and technology used and presents the magnet parameters in a consistent fashion.

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Sirius-Details of the New 3.2 T Permanent Magnet Superbend

Cited by 18 publications

References 6 publications

Development of a custom-made 2.8 T permanent-magnet dipole photon source for the ROCK beamline at SOLEIL

Development of a custom-made 2.8 T permanent-magnet dipole photon source for the ROCK beamline at SOLEIL

MOGNO, the nano and microtomography beamline at Sirius, the Brazilian synchrotron light source

Magnets for Low-Emittance Storage Rings an Overview

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