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Title: Enhanced betatron X-rays from axially modulated plasma wakefields

In the cavitation regime of plasma-based accelerators, a population of high-energy electrons trailing the driver can undergo betatron motion. The motion results in X-ray emission, but the brilliance and photon energy are limited by the electrons' initial transverse coordinate. To overcome this, we exploit parametrically unstable betatron motion in a cavitated, axially modulated plasma. Theory and simulations are presented showing that the unstable oscillations increase both the total X-ray energy and average photon energy.
Authors:
; ;  [1]
  1. Naval Research Laboratory, Washington DC 20375-5346 (United States)
Publication Date:
OSTI Identifier:
22490943
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physics of Plasmas; Journal Volume: 22; Journal Issue: 6; Other Information: (c) 2015 U.S. Government; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; BETATRONS; ELECTRONS; OSCILLATIONS; PHOTON EMISSION; PHOTONS; PLASMA; PLASMA SIMULATION; WAKEFIELD ACCELERATORS; X RADIATION