End-to-end simulation of a visible 1kW FEL

Parazzoli, C. G.; Koltenbah, B. E. C.

doi:10.1016/s0168-9002(99)01438-2

Cited by 4 publications

(1 citation statement)

References 28 publications

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“…First, damage to the photocathode coatings responsible for high QE might be reversed ͑the cathode can be "rejuvenated"͒ using a dispenser photocathode approach. 2, [30][31][32][33] Related to the temporal flatness of the bunch is the rapidity with which the current pulse increases and decreases ͑the "rise/fall" time͒: by way of example, the European X-ray FEL uses a trapezoidal pulse 20 ps long with a 4 ps rise/fall time 34 and numbers of a similar size describe high power and other FELs. [17][18][19][20][21] And third, the apparent QE of the photocathode might be greatly increased by exploiting the high yield of secondary emission in a diamond thin layer.…”

Section: Introductionmentioning

confidence: 99%

Bunch characteristics of an electron beam generated by a diamond secondary emitter amplifier

Jensen

Yater

Shaw

et al. 2010

Journal of Applied Physics

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Electron bunches for high performance free electron lasers are subject to constraints on charge per bunch and pulse shape. A Diamond secondary emitter used in conjunction with a photocathode and drive laser has potential to enable a high brightness, high peak current photoinjector by increasing the effective quantum efficiency of the photocathode. A theoretical characterization of the bunches so produced has been heretofore absent. Using a combination of Monte Carlo and analytical models, the shape of the bunches, their transit time, and emission time constants are determined and shown to be sensitive to the accelerating field in the diamond flake, incident beam profile, doping, and surface conditions. Methods to allow for extension to regimes of technological interest in terms of diamond thickness, external field, and primary pulse shape are given.

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