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Machine Learning Based Spatial Light Modulator Control for the Photoinjector Laser at FLUTE


Chenran Xu, Erik Bründermann, Anke-Susanne Müller, Michael Johannes Nasse, Andrea Santamaria Garcia, Carl Sax, Christina Widmann, Annika Eichler

Beteiligtes Institut

Institut für Beschleunigerphysik und Technologie (IBPT)
Laboratorium für Applikationen der Synchrotronstrahlung (LAS)
Fakultät für Physik (PHYSIK)


Beiträge rund ums KIT


FLUTE (Ferninfrarot Linac- und Test-Experiment) at KIT is a compact linacbased
test facility for novel accelerator technology and a source of intense
THz radiation. FLUTE is designed to provide a wide range of electron bunch
charges from the pC- to nC-range, high electric fields up to 1.2 GV/m, and
ultra-short THz pulses down to the fs-timescale. The electrons are generated
at the RF photoinjector, where the electron gun is driven by a commercial
titanium sapphire laser. In this kind of setup the electron beam properties are
determined by the photoinjector, but more importantly by the characteristics
of the laser pulses. Spatial light modulators can be used to transversely and
longitudinally shape the laser pulse, offering a flexible way to shape the laser
beam and subsequently the electron beam, influencing the produced THz
pulses. However, nonlinear effects inherent to the laser manipulation
(transportation, compression, third harmonic generation) can distort the
original pulse. In this paper we propose to use machine learning methods to
manipulate the laser and electron bunch, aiming to generate tailor-made THz
pulses. The method is demonstrated experimentally in a test setup.



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Creative Commons Namensnennung 4.0 International

Auflösung 1280 x 720 Pixel
Seitenverhältnis 16:9
Audiobitrate 126914 bps
Audio Kanäle 2
Audio Codec aac
Audio Abtastrate 48000 Hz
Gesamtbitrate 944421 kbps
Farbraum yuv420p
Container mov,mp4,m4a,3gp,3g2,mj2
Medientyp video/mp4
Dauer 259 s
Dateiname DIVA-2021-283_hd.mp4
Dateigröße 30.531.244 byte
Bildwiederholfrequenz 25
Videobitrate 811443 kbps
Video Codec h264