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["Adelmann Andreas (PSI)" <andreas.adelmann AT psi.ch>]

Dear Collegues the MSc thesis defence of Nick Sauerwein will take place on the 22.2.2018, 15.00 in WBBA 008

Beam Characterization of Low Energy Electrons from a Laser Wakefield Accelerator

The characteristics of low energy electrons accelerated by a laser wakefield are studied. A shock-front in the gas jet flow is used for particle injection. The work includes understanding the acceleration process, setting up the experiment and measuring properties like the charge, divergence and energy of the accelerated elec- trons. The experiment includes diagnostics for the laser, the electrons and the gas jet. In order to make high resolution energy distribution measurements with relative errors ∆E/E of below 10%, a tunable electron spectrometer has been set up. A tunable permanent magnet quadrupole triplet allowed for setting of the stig- matic focus in a range from 5 keV to 5 MeV. For the experiment, a browser based interface (pyPECS) was developed. With a Faraday cup, electron acceleration to energies of the order of 60 keV was verified. With acceleration length being 0.3 mm, an accelerating gradient above 200 MeV m−1 was achieved. The divergences of the accelerated bunches were of the order of 20 mrad.

Please forward this to interested colleagues. 

Cheers Andreas 

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Dr. sc. math. Andreas (Andy) Adelmann
Staff Scientist
Paul Scherrer Institut WBBA/219 CH-5232 Villigen PSI
Phone Office: xx41 56 310 42 33 Fax: xx41 56 310 31 91
Phone Home: xx41 62 891 91 44
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The more exotic, the more abstract the knowledge, 
the more profound will be its consequences.
Leon Lederman 
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