Figure 1
Experimental arrangement of the new type of X-ray energy-tunable polarimeter with a phase retarder. The polarizer and analyser crystals are similar channel-cut crystals giving four-bounce 422 symmetric Bragg reflections and are equipped with a Hart–Rodrigues offset mechanism. The phase retarder is a diamond (001)-oriented plate of 313 µm thickness giving 111 asymmetric Laue-case reflection with a plane of incidence inclined by 45° from the horizontal. The X-ray energy was scanned by controlling the polarizer, analyser and phase-retarder crystals simultaneously. |