NSLS-II Seminar

"Fast switching polarized soft x-rays at X13A"

Presented by Cecilia Sanchez-Hanke

Monday, March 16, 2009, 10:00 am — Large Conference Room, Building 703

X13A at NSLS is a beamline dedicated to the generation and uses of fast-switching elliptically-polarized soft x-rays in the energy range from 250 eV to ~1600 eV. The source for this beamline is an elliptically polarized wiggler (EPW) that delivers linearly and elliptically-polarized soft x-rays. EPW is a unique hybrid (permanent magnets and electromagnets) insertion device that delivers elliptically polarized soft x-rays switching between left and right handeness at 22Hz.
In the last 10 years polarization-sensitive X-ray absorption spectroscopies, MCD and MLD, are some of the most demanded soft x-ray techniques at synchrotron radiation facilities. In many cases experiments in this field are count rate limited, so any efforts to speed up the data acquisition time and increase the sensitivity in the detection of small signals are important.
In the presentation I will show the results of experiments performed at the X13A that needed EPW’s fast switching capability to be successful. I also will show the upgrades plans for X13A to expand its capabilities as instrument to measure polarization sensitive phenomena and to improve the data collection in the next future.

Hosted by: Qun Shen

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