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

Development of a novel segmented THz-driven electron source

TUPM084
3 Jun 2025, 16:00
2h
Exhibiton Hall A _Magpie (TWTC)

Exhibiton Hall A _Magpie

TWTC

Poster Presentation MC3.A15 New Acceleration Concepts and Techniques Tuesday Poster Session

Speaker

Reza Bazrafshan (Deutsches Elektronen-Synchrotron DESY)

Description

Scaling the RF-accelerator concept to terahertz (THz) frequencies possesses several compelling advantages, including compactness, intrinsic timing between the photoemission and driving field sources, and higher field gradients associated with the shorter THz wavelength and higher breakdown threshold promising vastly smaller and cost-efficient accelerators. These benefits, however, come at the cost of smaller dimensions and tighter tolerances which are challenging to reach in practice. Experiments to test and characterize a multi-layered structure easy-to-implement electron source with tunable interaction length powered by 2 × 100 µJ of twin single-cycle THz pulses predicted to produce 100 fC electron bunches with 100 keV energy, < 1 % energy spread, 0.01 - 0.07 mm mrad transverse emittance and a bunch duration of 20 − 40 fs are currently in progress. Besides the gun structure, the performance characteristics of the THz-driven electron source, including the generation of terahertz pulses, UV beam profile, coupling efficiency of the gun structure, electron beam dynamics, etc are discussed in detail. Such THz-based accelerator prototypes are not only promising as injectors for compact THz-based LINACs but also as a source for ultrafast electron diffraction experiments

Region represented Europe

Author

Reza Bazrafshan (Deutsches Elektronen-Synchrotron DESY)

Co-authors

Junhao Zhang (Deutsches Elektronen-Synchrotron DESY) Mr Tobias Kroh (Deutsches Elektronen Synchrotron (DESY) and Center for Free Electron Science (CFEL)) Nicholas Matlis (Deutsches Elektronen Synchrotron (DESY) and Center for Free Electron Science (CFEL)) Moein Fakhari (Deutsches Elektronen-Synchrotron DESY) Franz Kaertner (Deutsches Elektronen-Synchrotron DESY)

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