A sub-picosecond accumulating streak camera for x-rays
- 9 October 2001
- journal article
- Published by IOP Publishing in Measurement Science and Technology
- Vol. 12 (11), 1858-1864
- https://doi.org/10.1088/0957-0233/12/11/314
Abstract
An x-ray streak camera system uses a laser triggered photo-conductive switch to synchronize the high voltage ramp applied to its sweep plates to the photo-excitation of a sample. This technique allows the jitter between successive sweeps to be kept below 100 fs compared to over 1 ps using classical methods. By accumulating a stable pulsed x-ray signal over many sweeps, a very high dynamic range can be achieved whilst maintaining a sub-picosecond time resolution. The ultimate time resolution is limited by the dispersion of electrons in the streak tube. Whilst triggering with a laser at 900 Hz we have achieved a time resolution (FWHM) of 640 fs at a detection wavelength of 267 nm for a 60 s accumulation period, corresponding to over 50 000 sweeps.Keywords
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