Beamline 4.0.2

Magnetic Spectroscopy and Scattering

Endstation Vector Magnet
Endstation Resonant X-Ray Scattering
Endstation Superconducting Vector Magnet
Endstation X-ray detected ferromagnetic resonance (XFMR)

Current status	Operational; open to general users
ALS-U Status	This beamline will temporarily close at the start of the ALS-U dark time and will resume operations after a commissioning period. For more information, see ALS-U Beamline Impacts and other ALS-U web pages.
Source	EPU5
Minimum energy (eV)	400
Maximum energy (eV)	1,500
Research areas	Applied Sciences Materials Sciences Physical Sciences
Technique category	Spectroscopy Magnetic spectroscopy X-ray absorption spectroscopy (XAS) Scattering/Diffraction Magnetic scattering Resonant scattering
Flux/Brightness	1 x 10¹³ photons/s/0.1%BW at 800 eV
Resolving power	5,000-10,000
Access modes	Onsite
Additional notes	Polarization is user selectable; linear polarization continuously variable from horizontal to vertical; left and right elliptical (or circular) polarization.
Primary contact(s)	Christoph Klewe CKlewe@lbl.gov 510-486-6692 Alpha T. N’Diaye atndiaye@lbl.gov 510-486-5926
Beamline phone number	510-495-2041

Endstation

Vector Magnet

Status	Operational; open to general users
Research areas	Applied Sciences Materials Sciences Physical Sciences
Technique category	Spectroscopy Magnetic spectroscopy X-ray absorption spectroscopy (XAS)
Spot size	100 μm x 100 μm
Sample information	Solid samples
Additional Notes	X-ray magnetic circular dichroism (XMCD); x-ray magnetic linear dichroism (XMLD); orbital polarization and interface studies. Magnetic fields up to 0.5 T in any direction; Sample temperature 15-750 K; electron yield, fluorescence yield, and luminescence yield detection, plus transmission mode

Endstation

Resonant X-Ray Scattering

Status	Operational; open to general users
Research areas	Applied Sciences Materials Sciences Physical Sciences
Technique category	Scattering/Diffraction Magnetic scattering Resonant scattering
Spot size	100 μm x 100 μm
Sample information	Solid samples
Additional Notes	Resonant soft x-ray diffraction (RSXD); x-ray resonant magnetic reflectometry (XRMR); resonant elastic x-ray scattering (REXS). Sample temperature 15-320 K; Detectors: Photodiode (7 decades) or CCD (16-bit); 2-theta: 0 - 160 deg, incidence: 0 - 180 deg; chi: 0 - 90 deg; Optional magnetic field: ~0.3 T out-of-plane OR ~0.1 T in-plane

Endstation

Superconducting Vector Magnet

Status	Operational; open to general users
Research areas	Applied Sciences Materials Sciences Physical Sciences
Technique category	Spectroscopy Magnetic spectroscopy X-ray absorption spectroscopy (XAS)
Spot size	150 μm x 150 μm
Sample information	Solid samples
Additional Notes	Magnetic fields up to 3.8 T in any direction; Sample temperature 20-300 K; electron yield and luminescence yield detection

Endstation

X-ray detected ferromagnetic resonance (XFMR)

Status	Operational; open to general users
Research areas	Applied Sciences Materials Sciences Physical Sciences
Technique category	Spectroscopy Magnetic spectroscopy X-ray absorption spectroscopy (XAS)
Spot size	100 μm x 100 μm
Field of view/spatial resolution	500 μm aperture
Sample information	Thin films on luminescent substrates (e.g., Al2O3, MgO)
Additional Notes	Coplanar RF waveguide 0.5–5 GHz; Magnetic field up to 0.5 T; Sample temperature 20–320 K; Luminescence yield detection; Transverse FMR, sensitive to phase of precession