1–6 Jun 2025
Taipei International Convention Center (TICC)
Asia/Taipei timezone

MTE measurements at the ASU cryogenically cooled DC electron gun

THPM034
5 Jun 2025, 15:30
2h
Exhibiton Hall A _Magpie (TWTC)

Exhibiton Hall A _Magpie

TWTC

Poster Presentation MC6.T03 Beam Diagnostics and Instrumentation Thursday Poster Session

Speaker

Peter Owusu (Arizona State University)

Description

The ASU cryogenically cooled DC electron gun represents a state-of-the-art platform for testing novel photocathodes at room and cryogenic temperatures. The key electron beam diagnostic tool of this setup is the four-dimensional (4D) phase space reconstruction using the pinhole scan technique. In this work, we use the 4D phase space measurement to extract the Mean Transverse Energy (MTE) obtained from cathodes in this gun. We also establish the limits and accuracy of the 4D phase space and emission area measurements and estimate their effects on the MTE extracted. The results, validated through simulations and complementary measurements establish the use of the 4D phase space measurement technique to obtain the MTE. Using this approach, we measure the MTE from alkali antimonide photocathodes at varying temperature and electric field conditions. This study provides a robust foundation for future experiments with the ASU electron gun and beamline, paving the way for advanced photocathode characterization under cryogenic conditions.

Funding Agency

US National Science Foundation
US Department of Energy

Region represented America
Paper preparation format LaTeX

Author

Peter Owusu (Arizona State University)

Co-authors

Jo Mama (Arizona State University) Truman Idso (Arizona State University) Anagha Ullattuparambil (Arizona State University) Mansoure Moeini Rizi (Arizona State University) John Anawalt (Arizona State University) Siddharth Karkare (Arizona State University)

Presentation materials

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