PM2-VEKMAG
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
- C. Luo, H. Ryll, C. H. Back, and F. Radu, Sci Rep 9, 18169 (2019)
- D. Schmitz et al., Phys. Status Solidi B, 1900456 (2019)
- S. Poellath et al. Phys. Rev. Lett. 123, 167201 (2019)
- Phys. Rev. Lett., 122, 037601 (2019)
- A. Alhassanat et al., Phys. Rev. B 98, 064428 (2018)
- L. Kipgen et al.,Nature Communications 9, 2984 (2018)
- R. Aeschlimann et al., Adv. Mater. 2018, 1707489 (2018)
- A. A. Sapozhnik et al. , Phys. Rev. B 97, 184416 (2018)
- B. Hebler et al., Phys. Rev. B 95, 104410 (2017)
- T. Noll and F. Radu, The Mechanics of the VEKMAG experiment, Proceedings of MEDSI2016, 370 (2017)
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)