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AKBP: Arbeitskreis Beschleunigerphysik

AKBP 2: PWA / TNSA I

AKBP 2.4: Vortrag

Montag, 9. März 2015, 14:45–15:00, BZ.08.04 (HS 2)

Plasma wakefield generated by a modulated electron beam — •Roberto Martorelli — Institut für Theoretische Physik I, Heinrich-Heine-Universität, Düsseldorf

Particle beams have a number of important applications, from medicine to high energy physics. The capabilities of the actual technology is limited and this results in the huge dimensions of the accelerators. One promising alternative to RF accelerators is the plasma wakefield acceleration, due to the high acceleration gradients the plasma can sustain. In a plasma wakefield, a driver - laser or particle beam - is injected in a plasma channel, exciting the Langmuir waves. The electric field associated with the wakefield can be used for the acceleration of a witness bunch.

Our work is focused on the wakefield driven by a modulated electron beam. The main research consists in finding the proper conditions for the train of bunches in order to obtain a higher transformer ratio (TR), defined as the ratio between the maximum accelerating electric field behind the driver and the maximum decelerating electric field inside the driver. Through a semi-analytical approach, combined with particle-in-cell simulations, we look for the proper initial configuration for the train of beams in order to maximize the TR, analysing subsequently the stability of the beams while propagating into the plasma.