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RIS citation export for TUYD3: The Quest for the Perfect Cathode

AU  - Lewellen, J.W.
AU  - Filippetto, D.
AU  - Karkare, S.S.
AU  - Maxson, J.M.
AU  - Musumeci, P.
AU  - Smedley, J.
AU  - Vecchione, T.
ED  - Biedron, Sandra
ED  - Simakov, Evgenya
ED  - Milton, Stephen
ED  - Anisimov, Petr M.
ED  - Schaa, Volker R.W.
TI  - The Quest for the Perfect Cathode
J2  - Proc. of NAPAC2022, Albuquerque, NM, USA, 07-12 August 2022
CY  - Albuquerque, NM, USA
T2  - International Particle Accelerator Conference
T3  - 5
LA  - english
AB  - The next generation of free electron lasers will be the first to see the performance of the laser strongly dependent on the materials properties of the photocathode. A new injector proposed for the LCLS-II HE is an example of this revolution, with the goal of increasing the photon energy achievable by LCLS-II to over 20 keV. We must now ask, what is the optimal cathode, temperature, and laser combination to enable this injector? There are many competing requirements. The cathode must be robust enough to operate in a superconducting injector, and must not cause contamination of the injector. It must achieve sufficient charge at high repetition rate, while minimizing the emittance. The wavelength chosen must minimize mean transverse energy while maintaining tolerable levels of multi-photon emission. The cathode must be capable of operating at high (~30 MV/m) gradient, which puts limits on both surface roughness and field emission. This presentation will discuss the trade space for such a cathode/laser combination, and detail a new collaborative program among a variety of institutions to investigate it.
PB  - JACoW Publishing
CP  - Geneva, Switzerland
SP  - 281
EP  - 284
KW  - cathode
KW  - gun
KW  - electron
KW  - emittance
KW  - photon
DA  - 2022/10
PY  - 2022
SN  - 2673-7000
SN  - 978-3-95450-232-5
DO  - doi:10.18429/JACoW-NAPAC2022-TUYD3
UR  - https://jacow.org/napac2022/papers/tuyd3.pdf
ER  -