Generation of circularly polarized radiation from a compact plasma-based extreme ultraviolet light source for tabletop X-ray magnetic circular dichroism studies

Journal Article · Wed Oct 15 04:00:00 EDT 2014 · Review of Scientific Instruments

DOI:https://doi.org/10.1063/1.4897491· OSTI ID:22305874

Wilson, Daniel; Rudolf, Denis; Juschkin, Larissa ^[1]; Weier, Christian; Adam, Roman; Schneider, Claus M. ^[2]; Winkler, Gerrit; Frömter, Robert ^[3]; Danylyuk, Serhiy ^[4]; Bergmann, Klaus ^[5]; Grützmacher, Detlev ^[6]

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1. RWTH Aachen University, Experimental Physics of EUV, Steinbachstraße 15, 52074 Aachen (Germany)
2. Forschungszentrum Jülich GmbH, Peter Grünberg Institut (PGI-6), JARA-FIT, 52425 Jülich (Germany)
3. Institut für Angewandte Physik, Universität Hamburg, Jungiusstraße 11, 20355 Hamburg (Germany)
4. RWTH Aachen University, Chair for Technology of Optical Systems, JARA-FIT, Steinbachstraße 15, 52074 Aachen (Germany)
5. Fraunhofer Institute for Laser Technology, Steinbachstrasse 15, 52074 Aachen (Germany)
6. Forschungszentrum Jülich GmbH, Peter Grünberg Institut (PGI-9), JARA-FIT, 52425 Jülich (Germany)

Generation of circularly polarized light in the extreme ultraviolet (EUV) spectral region (about 25 eV–250 eV) is highly desirable for applications in spectroscopy and microscopy but very challenging to achieve in a small-scale laboratory. We present a compact apparatus for generation of linearly and circularly polarized EUV radiation from a gas-discharge plasma light source between 50 eV and 70 eV photon energy. In this spectral range, the 3p absorption edges of Fe (54 eV), Co (60 eV), and Ni (67 eV) offer a high magnetic contrast often employed for magneto-optical and electron spectroscopy as well as for magnetic imaging. We simulated and designed an instrument for generation of linearly and circularly polarized EUV radiation and performed polarimetric measurements of the degree of linear and circular polarization. Furthermore, we demonstrate first measurements of the X-ray magnetic circular dichroism at the Co 3p absorption edge with a plasma-based EUV light source. Our approach opens the door for laboratory-based, element-selective spectroscopy of magnetic materials and spectro-microscopy of ferromagnetic domains.

• OSTI ID: 22305874
• Journal Information: Review of Scientific Instruments, Journal Name: Review of Scientific Instruments Journal Issue: 10 Vol. 85; ISSN 0034-6748; ISSN RSINAK
• Country of Publication: United States
• Language: English

Related Subjects

46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
COBALT
ELECTRON SPECTROSCOPY
EV RANGE
EXTREME ULTRAVIOLET RADIATION
IRON
LIGHT SOURCES
MAGNETIC CIRCULAR DICHROISM
MAGNETIC MATERIALS
MICROSCOPY
NICKEL
PHOTONS
PLASMA
POLARIZATION
SIMULATION
X RADIATION