Photoemission of Picosecond Electron Bunches with Large Charge in RF Guns
https://doi.org/10.56304/S2079562922010195
Abstract
Emission of short electron bunches with high charge in RF guns is considered. The emission mechanism in the case of picosecond laser pulses and the presence of a strong electric field at the cathode is quite different from the traditional one limited by the space charge of emitted particles. In this case, it is necessary to take into account the influence of positive charge dynamically formed on the cathode surface related to the difference of velocities of photoelectrons leaving the semiconductor film of the photocathode and velocities of electrons entering the emission region. The comparison of the numerical results and experimental data obtained at the facility for testing photoinjectors at PITZ (DESY, Zeuthen, Germany) demonstrated good agreement.
About the Authors
М. Krasilnikov
DESY, Hamburg, D-22607 Germany
Germany
Germany
S. М. Polozov
National Research Nuclear University MEPhI (Moscow Engineering Physics Institute), Moscow, 115409 Russia
Russian Federation
Russian Federation
V. I. Rashchikov
National Research Nuclear University MEPhI (Moscow Engineering Physics Institute), Moscow, 115409 Russia
Russian Federation
Russian Federation
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Review
For citations:
Krasilnikov М., Polozov S.М., Rashchikov V.I. Photoemission of Picosecond Electron Bunches with Large Charge in RF Guns. Nuclear Physics and Engineering. 2022;13(1):73-78. (In Russ.) https://doi.org/10.56304/S2079562922010195
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