24-30 September 2017
La Biodola, Isola d'Elba
Europe/Rome timezone

Timing measurement of laser-accelerated electron beams

25 Sep 2017, 19:12
18m
SML, Sala Maria Luisa (HH)

SML, Sala Maria Luisa

HH

talk WG1 - Electron Beams from Plasmas WG1_Parallel

Speaker

Dr Masaki Kando (KPSI, QST)

Description

Laser accelerated electron beams are considered to be jitter-free with respect to a probe laser pulse that can be split from the driving laser pulse. Such feature is favorable to apply laser accelerated electron beams for pump-probe experiment. However, we have detected a large delay (~1 ps) of electron beams in a self-injected case when the plasma density is low. Increase of the plasma density the time delay was decreased as well as jitter. While electron beams using ionization injection do not show such time delays. Our scheme utilized an electro-optical sampling technique with obliquely incident probe Ti:sapphire laser pulse. Electron beams were produced by focusing 400 mJ, 30 fs laser pulses irradiated onto helium or nitrogen gas target with a peak intensity of 1.8x10^18 W/cm^2. The timing was measured just after the gas-jet nozzle for 10-40 MeV electron beams with quasi-monoenergetic feature. 2D simulation results qualitatively reproduced our experimental results showing that injection mechanisms relate with the electron injection timing.

Primary author

Dr Masaki Kando (KPSI, QST)

Presentation Materials

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