IFAE-ALBA | Alba, 13 th December, 2012BL29 - BOREAS 1 of 20 BOREASBORE AS BOREAS, Beamline Of REsonant Absorption and Scattering: status report Javier.

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IFAE-ALBA | Alba, 13 th December, 2012BL29 - BOREAS 1 of 20 BOREASBORE AS BOREAS, Beamline Of REsonant Absorption and Scattering: status report Javier Herrero Contributions from M. Valvidares, E. Pellegrin, P. Gargiani “Boreas running”, (460 b.c., Yale Univ.)

IFAE-ALBA | Alba, 13 th December, 2012BL29 - BOREAS 2 of 20 General view

IFAE-ALBA | Alba, 13 th December, 2012BL29 - BOREAS 3 of 20 Full x-ray polarization control (APPLE-II undulator) eV energy range (~soft) Variable x-ray beam size and focal distance (KB system) (ES1) High-field SC vector magnet: 6T, 2T with 1.5K-370K sample temp. (ES2) UHV scattering chamber, 2T magnet, large angular access, 20K-350K Beamline designed for soft x-ray polarization-dependent spectroscopy & scattering highlights optical layout BL overview – scientific case & optical layout

IFAE-ALBA | Alba, 13 th December, 2012BL29 - BOREAS 4 of 20 E resolution with MEG BL optics – photon energy resolution -Instrumental resolution (E/  E) ~ 10,000 -Instrumental resolution (E/  E) ~ 10,000 for typically used 15/15 µm (entrance/exit) slits opening Photon flux with MEG) -Flux varying from to sample (depending on E)

IFAE-ALBA | Alba, 13 th December, 2012BL29 - BOREAS 5 of 20 “HECTOR” 6 Tesla UHV - Running full experiments since May 2012Scope - X-ray absorption measurements with: a) variable polarization incoming light b) variable sample temperature c) variable applied magnetic field Detection systems: - Electron drain sample - working - Si diode (transmission mode) - working - Si diode (total fluorescence yield) - in progress (Si diodes made by IRD, model AXUV100) Detection, planned: - Si drift diode (or other) (partial fluorescence yield) BL endstations – XMCD cryomagnet Requirements: E window selection, E range ca eV

IFAE-ALBA | Alba, 13 th December, 2012BL29 - BOREAS 6 of 20 BL endstations– Scattering chamber “MaReS” endstation concept. Expected  end 2013 In-vacuum CCD by XCAM (CFT awarded) In-vacuum magnet

IFAE-ALBA | Alba, 13 th December, 2012BL29 - BOREAS 7 of 20 “MaReS” endstation concept Expected  end 2013 In-vacuum CCD by XCAM (CFT awarded) 2D detection upgrade project Alternatives for 2D detection - Backthinned CMOS (comercially unavailable for soft x-rays when decission on CCD taken) Requirements: large dynamic range, fast reading time, UHV compatible Foreseen Detection systems: a) Point detection (~“0D”) - Si diode, from “IRD”, model SXUV700 - GaAsP diode, from “Hamamatzu” - Channeltron (for high E, photon counting) a) Spatially resolved detection (2D) - Microchannel plate, from “Hamamatzu” - CCD by “e2v”, 2k x 2k pixel, 20 micron pixel size; “XCAM” mouting (awarded)