7–12 May 2023
Venice, Italy
Europe/Zurich timezone

Photocathode charge map measurements at ARES

TUPL116
9 May 2023, 16:30
2h
Sala Laguna

Sala Laguna

Poster Presentation MC2.A08: Linear Accelerators Tuesday Poster Session

Speaker

Hannes Dinter (Deutsches Elektronen-Synchrotron DESY)

Description

The ARES linac at DESY (Deutsches Elektronen-Synchrotron) is a dedicated accelerator research and development facility for advanced accelerator technologies and applications, including high gradient accelerating schemes, high-resolution diagnostics and medical applications. It provides ultra-short, high quality electron beams with charges between a few femtocoulombs and a few hundred picocoulombs, with energies up to 155 MeV, characterized by high reproducibility and stability.

The electron bunches are generated in a photoinjector comprising a UV laser and a normal conducting S-band gun with an exchangeable cathode material, enabling the required wide charge range and temporal bunch profile. A set of movable mirrors allows to change the position of the laser spot on the cathode, which in combination with bunch charge diagnostics downstream of the gun can be used for measuring the extracted charge as a function of the laser position. With this method the emission homogeneity and changes of the cathode can be studied and different cathode materials can be compared. We present the first results using this technique at ARES, including charge map and quantum efficiency (QE) measurements.

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Author

Hannes Dinter (Deutsches Elektronen-Synchrotron DESY)

Co-authors

Ralph Assmann (Deutsches Elektronen-Synchrotron DESY) Florian Burkart (Deutsches Elektronen-Synchrotron DESY) Sonja Jaster-Merz (Universität Hamburg) Max Joseph Kellermeier (Deutsches Elektronen-Synchrotron DESY) Willi Kuropka (Deutsches Elektronen-Synchrotron DESY) Sven Lederer (Deutsches Elektronen-Synchrotron DESY) Christoph Mahnke (Deutsches Elektronen-Synchrotron DESY) Frank Mayet (Deutsches Elektronen-Synchrotron DESY) Blae Stacey (Deutsches Elektronen-Synchrotron DESY) Caterina Vidoli (Deutsches Elektronen-Synchrotron DESY) Thomas Vinatier (Deutsches Elektronen-Synchrotron DESY) Lutz Winkelmann (Deutsches Elektronen-Synchrotron DESY)

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