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BL39XU Helicity-modulation technique

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INS-0000000313

Helicity-modulation XMCD

  At BL39XU, the helicity-modulation technique for precise XMCD measurements has been developed by combining an XPR with a phase-sensitive (lock-in) detection system. This technique provides us with extremely high quality XMCD spectra in short measurement times. A dichroism signal in the order of 10-4 is obtainable with a good signal-to-noise ratio for 10 s-integration times at each energy point with a properly prepared sample. Additionally, XMCD measurements during a magnetic saturation process and under high magnetic fields generated with a superconducting magnet are feasible.

Last modified 2006-02-09 17:05
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