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Generating quasi-single-cycle THz pulse from frequency-chirped electron bunch train and a tapered undulator
- Part of
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- Journal:
- High Power Laser Science and Engineering / Volume 4 / 2016
- Published online by Cambridge University Press:
- 15 January 2016, e1
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We propose a proof-of-principle experiment to test a new scheme to produce a single-cycle radiation pulse in free-electron lasers (FELs). Here, a few
${\it\alpha}$-BBO crystals will be first used to produce an equally spaced laser pulse train. Then, the laser pulse train illuminates the cathode to produce a frequency-chirped electron bunch train in a photocathode rf gun. Finally, the frequency-chirped electron bunch train passes through a tapered undulator to produce a quasi-single-cycle THz pulse. This experiment should allow comparison and confirmation of predictive models and scaling laws, and the preliminary experimental results will also be discussed.
