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Femtosecond response time measurements of a Cs2Te photocathode | | A. Aryshev
; M. Shevelev
; Y. Honda
; N. Terunuma
; J. Urakawa
; | | Date: |
13 Jul 2015 | | Abstract: | We present the response time measurements of a Cs2Te photocathode illuminated
with two 100 fs duration, variable time separation laser pulses at 266 nm
wavelength. The response time was confirmed in dispersive region downstream of
a 12-cell standing wave S-band acceleration structure using a well-known RF
zero-crossing technique. At the same time it was also measured by changing
mechanical path-length difference between two micro-bunches. Both methods agree
that Cs2Te photocathode time response is of the order of 250 fs and thereby it
is possible to generate and control a THz sequence of relativistic electron
bunches by a conventional S-band RF gun. This result further opens a
possibility to construct wide-range tunable THz FEL. | | Source: | arXiv, 1507.3302 | | Services: | Forum | Review | PDF | Favorites | |
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