Vector Magnet

The beamline PM2, dedicated to host the Vector Superconducting Magnet station VEKMAG, is located at a bending magnet of BESSY II and offers an extremely stable beam. In order to be able to change the polarization of the x-rays very rapidly, a hexapod vacuum chamber with six moveable legs supporting a mirror was developed. Slight changes of the leg positions can change the orientation of the first mirror and thereby the polarization of the x-ray beam in just seconds. This prototype arrangement improves the signal-to-noise ratio by a factor of more than ten.

Station data
Temperature range 0.325 - 500 K
Pressure range UHV
More details VEKMAG
Beamline data
Segment H05
Location (Pillar) 7.1
Source D51 (Dipole)
Monochromator PM-2
Energy range 20 - 1600 eV
Energy resolution variable
Flux ~5 x 109 photons/sec
Polarisation Circular, Horizontal
Divergence horizontal 6 mrad
Divergence vertical 10 mrad
Focus size (hor. x vert.) Variable between
• 60 µm x 50 µm
• 800 µm x 800 µm
User endstation not possible
Distance Focus/last valve -- mm
Height Focus/floor level 1432 mm
Beam availability 24h/d
Phone +49 (0)30 8062 - 14834
Gratings 1200, 150 lines/mm
Polarization switching time 2 seconds
Mirror coating Ta

For more details and current status contact the beamline scientist(s).

List Publications

Posters and Talks

  • Florin Radu,  Probing nanoscale magnetism with soft x-rays , International Conference on Surface X-Ray and Neutron Scattering Hamburg, 07.07.2014 - 11.07.2014 (2014)
  • Florin Radu, VEKMAG,  7th Joint BER II and BESSY II User Meeting (2015)
  • F. Radu, H. Ryll, C. Luo, R. Abrudan, S. Rudorff, O. Rader, T. Noll,   W. Kuch,  A. J. Britton, l. Machado-Arruga, H. Zabel, G. Woltersdorf, and C. Back, VEKMAG - a vector magnet for BESSY II, From Matter to Materials and Life DESY, Hamburg, 14.12.2016 - 16.12.2016 (2016)
  • H. Ryll, A. Balzer,  L. Drescher, F.  Eggenstein, R. Fleischhauer, C. Kalus, O. Pawlizki, O. Rader, R. Ringel, S. Rudorff, J.-S. Schmidt,  E. Suljoti,  and F. Radu, PM2 - A new soft x-ray beamline for magnetism, From Matter to Materials and Life DESY, Hamburg, 14.12.2016 - 16.12.2016 (2016)
  • S Pöllath, C Luo, M Schön, F Radu, H Ryll, and CH Back, Soft X-ray Resonant Magnetic Scattering from the helical phase in Cu2OSeO3 at VEKMAG, DPG Dresden (2017)