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TY - CONF AU - Pinty, V. AU - Jaouen, N. AU - Marteau, F. AU - Popescu, H. AU - Prout, P. ED - Schaa, Volker RW ED - Tavakoli, Keihan ED - Tilmont, Manuel TI - MAGSTAT V3: An In-Vacuum Variable-Gap Quadrupole with Rotary Permanent Magnets J2 - Proc. of MEDSI2018, Paris, France, 25-29 June 2018 C1 - Paris, France T2 - Mechanical Engineering Design of Synchrotron Radiation Equipment and Instrumentation T3 - 10 LA - english AB - MAGSTAT is a quadrupole designed to magnetize samples with a variable magnetic field in flow density and in directions. Four rotary permanent magnets allow the user to specify a direction for the field and changing in situ the gap between the poles drives the field intensity. The first prototype was realized in 2016 on the SEXTANTS beamline in the framework of SOLEIL-MAXIV collaboration; a second version has been manufactured for MAXIV SoftImax beamline. This third version shows a significant evolution of the mechanical design, guaranteeing a much better stiffness in high field configurations. Samples up to Ø74mm can be placed in this quadrupole, and the tiny ones which may fit in a Ø10mm circle or smaller, can be magnetized with a 1T local field. The angle of each magnet is driven by a dedicated stepper motors with a big reduction ratio. The total gap is ensured by a single motor, and its motion is symmetrically transferred to the magnets through an Archimedean spiral. The first prototype is installed at COMET endstation dedicated to the coherent scattering of soft X-ray in transmission for imaging magnetic materials via the Fourier Transform Holography or ptychography techniques. PB - JACoW Publishing CP - Geneva, Switzerland SP - 412 EP - 414 KW - quadrupole KW - vacuum KW - GUI KW - synchrotron KW - permanent-magnet DA - 2018/12 PY - 2018 SN - 978-3-95450-207-3 DO - 10.18429/JACoW-MEDSI2018-THPH37 UR - http://jacow.org/medsi2018/papers/thph37.pdf ER -