Dresden 2026 – wissenschaftliches Programm

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AKBP: Arbeitskreis Beschleunigerphysik

AKBP 2: Electron Accelerators and Sources II

AKBP 2.3: Vortrag

Montag, 9. März 2026, 11:45–12:00, SCH/A117

Status and Perspectives of the Photo-CATCH Photocathode Test Stand* — •Maximilian Herbert, Joachim Enders, Markus Engart, Robin Petry, and Vincent Wende — Institut für Kernphysik, Technische Universität Darmstadt, Darmstadt, Germany

TU Darmstadt's test stand for Photo-Cathode Activation, Testing and Cleaning using atomic-Hydrogen Photo-CATCH faciliates dedicated research on GaAs photocathodes for electron-beam production at accelerators. Recent results include successful tests of automatized activation [1] and improved photocathode lifetime using an enhanced Cs-O-Li surface layer [2,3]. This contribution will present the current status of Photo-CATCH and work planned in the near future.

[1] M. Herbert et al., PoS(PSTP2022), Vol. 433, p. 003 (2023).

[2] N. Kurichiyanil et al., J. Instrum. 14 (8), P08025 (2019).

[3] M. Herbert et al., Phys. Rev. Accel. Beams 28, 013401 (2025).

*Work supported by DFG (Project-ID 264883531 - GRK 2128 ``AccelencE'', and Project-ID 499256822 - GRK 2891 ``Nuclear Photonics'')

Keywords: Photocathode; Photogun; GaAs; Spin-polarized electrons