Spectral encoding of x-ray/optical relative delay

We present a new technique for measuring the relative delay between a soft x-ray FEL pulse and an optical laser that indicates a sub 25 fs RMS measurement error. An ultra-short x-ray pulse photo-ionizes a semiconductor (Si(3)N(4)) membrane and changes the optical transmission. An optical continuum p...

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Bibliographic Details
Published in:Optics express 2011-10, Vol.19 (22), p.21855-21865
Main Authors: Bionta, Mina R, Lemke, H T, Cryan, J P, Glownia, J M, Bostedt, C, Cammarata, M, Castagna, J-C, Ding, Y, Fritz, D M, Fry, A R, Krzywinski, J, Messerschmidt, M, Schorb, S, Swiggers, M L, Coffee, R N
Format: Article
Language:English
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Summary:We present a new technique for measuring the relative delay between a soft x-ray FEL pulse and an optical laser that indicates a sub 25 fs RMS measurement error. An ultra-short x-ray pulse photo-ionizes a semiconductor (Si(3)N(4)) membrane and changes the optical transmission. An optical continuum pulse with a temporally chirped bandwidth spanning 630 nm-710 nm interacts with the membrane such that the timing of the x-ray pulse can be determined from the onset of the spectral modulation of the transmitted optical pulse. This experiment demonstrates a nearly in situ single-shot measurement of the x-ray pulse arrival time relative to the ultra-short optical pulse.
ISSN:1094-4087
1094-4087
DOI:10.1364/OE.19.021855