22–26 Aug 2022
Trieste Convention Centre
Europe/Zurich timezone

A Pulse Shaper for Direct Generation of 515 nm 3D Ellipsoidal Pulses at PITZ

TUP01
23 Aug 2022, 16:00
2h
Exhibition Hall (Trieste Convention Centre)

Exhibition Hall

Trieste Convention Centre

Contributed Poster Electron sources Tuesday posters

Speaker

Christian Koschitzki (Deutsches Elektronen-Synchrotron DESY at Zeuthen)

Description

In this paper, a cathode laser pulse shaper at 515 nm is presented that will be used for emittance optimizations. In case alkali antimonide photocathodes are used, the shaped green pulses can be applied directly for photoemission while Cs2Te photocathodes requires second harmonic generation to provide UV laser pulses. Recent tests of CsK2Sb photocathodes in the high gradient RF gun at PITZ are first steps for the future usage of green laser pulses, which would simplify the requirements for the photocathode laser system, especially for CW operation cases envisioned in future. As long the alkali antimonide photocathodes are not in regular use yet, the laser pulses need to be converted into the UV. The green pulse shaper still simplifies the laser system since two conversion stages from IR to green to UV were needed in the past, which dilutes the quality of the shaped laser pulses. In this paper, a pulse shaper for direct generation of 515nm 3D ellipsoidal pulses is presented that is expected to further improve the beam emittance generated by ellipsoidal laser shaping.

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Primary author

Andreas Hoffmann (Deutsches Elektronen-Synchrotron DESY at Zeuthen)

Co-authors

James Good (Deutsches Elektronen-Synchrotron DESY at Zeuthen) Matthias Gross (Deutsches Elektronen-Synchrotron DESY at Zeuthen) Christian Koschitzki (Deutsches Elektronen-Synchrotron DESY at Zeuthen) Mikhail Krasilnikov (Deutsches Elektronen-Synchrotron DESY at Zeuthen) Houjun Qian (Deutsches Elektronen-Synchrotron DESY at Zeuthen) Frank Stephan (Deutsches Elektronen-Synchrotron DESY at Zeuthen)

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