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Constantin Aniculaesei
초강력 레이저과학 연구단
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Electron energy increase in a laser wakefield accelerator using up-ramp plasma density profiles

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Title
Electron energy increase in a laser wakefield accelerator using up-ramp plasma density profiles
Author(s)
Constantin Aniculaesei; Vishwa Bandhu Pathak; Hyung Taek Kim; Kyung Hwan Oh; Byung Ju Yoo; Brunetti, E; Yong Ha Jang; Calin I oan Hojbota; Jung Hun Shin; Jong Ho Jeon; Seongha Cho; Myung Hoon Cho; Jae Hee Sung; Seong Ku Lee; Björn Manuel Hegelich; Chang Hee Nam
Publication Date
2019-08
Journal
SCIENTIFIC REPORTS, v.9, no., pp.11249 -
Publisher
NATURE PUBLISHING GROUP
Abstract
The phase velocity of the wakefield of a laser wakefield accelerator can, theoretically, be manipulated by shaping the longitudinal plasma density profile, thus controlling the parameters of the generated electron beam. We present an experimental method where using a series of shaped longitudinal plasma density profiles we increased the mean electron peak energy more than 50%, from 175 +/- 1 MeV to 262 +/- 10 MeV and the maximum peak energy from 182 MeV to 363 MeV. The divergence follows closely the change of mean energy and decreases from 58.9 +/- 0.45 mrad to 12.6 +/- 1.2 mrad along the horizontal axis and from 35 +/- 0.3 mrad to 8.3 +/- 0.69 mrad along the vertical axis. Particle-in-cell simulations show that a ramp in a plasma density profile can affect the evolution of the wakefield, thus qualitatively confirming the experimental results. The presented method can increase the electron energy for a fixed laser power and at the same time offer an energy tunable source of electrons.© The Author(s) 2019
URI
https://pr.ibs.re.kr/handle/8788114/6124
ISSN
2045-2322
Appears in Collections:
Center for Relativistic Laser Science(초강력 레이저과학 연구단) > Journal Papers (저널논문)
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