PM3

Soft X-ray dipole variable polarisation with PGM open port + scattering chamber

PM3 merges the developments of the former BESSY I SX700 III monochromator for elliptically polarized VUV radiation and of BESSY II collimated plane grating monochromators. This way it is possible to achieve circular polarization from a BESSY II dipole in the range 20 – 2000 eV with high photon flux, high energy resolution and high stability.

Optical Layout of the PM3 beamline

Optical Layout of the PM3 beamline


Beamline data
Segment H11
Location (Pillar) 13.2
Source D111 (Dipole)
Monochromator PM3
Energy range 20 - 1900 eV
Energy resolution 32000 at 64 eV
Flux 1e9 - 1e10
Polarisation • horizontal
• circular
Divergence horizontal 1.5 mrad
Divergence vertical 1 mrad
Focus size (hor. x vert.) 300
User endstation Possible
Distance Focus/last valve 500 mm
Height Focus/floor level 1432 mm
Beam availability 24h/d
Phone 0049 30 8062 13429
Applicable station(s)
User station
ALICE II 10 - 475 K
PM3 scattering
SOLIAS 90 - 1000 K
RGBL-PEEM preparation: 300 – 3000 K
measurement: 300 K
ALICE 10 K-475K
Floor Plan

Floor Plan

Electron-Yield on Au for different degrees of ellipticity

Electron-Yield on Au for different degrees of ellipticity

Energy resolution @ 400 eV

Energy resolution @ 400 eV

Noise of X-ray intensity close to "shot-noise"

Noise of X-ray intensity close to "shot-noise"


"PM3 merges the developments of the former BESSY I SX700 III monochromator for elliptically polarized VUV radiation and of BESSY II collimated plane grating monochromators. This way it is possible to achieve circular polarization from a BESSY II dipole in the range 20 – 2000 eV with high photon flux, high energy resolution and high stability." http://dx.doi.org/10.17815/jlsrf-2-73

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