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Measurement of angularly dependent spectra of betatron gamma-rays from a laser plasma accelerator with quadrant-sectored range filters

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Title
Measurement of angularly dependent spectra of betatron gamma-rays from a laser plasma accelerator with quadrant-sectored range filters
Author(s)
Jong Ho Jeon; Kazuhisa Nakajima; Hyung Taek Kim; Yong Joo Rhee; Vishwa Bandhu Pathak; Myung Hoon Cho; Jung Hun Shin; Byung Ju Yoo; Sung Ha Jo; Kang Woo Shin; Calin Hojbota; Lee Jin Bae; Jaehyung Jung; Min Sang Cho; Jae Hee Sung; Seong Ku Lee; Byeoung Ick Cho; Il Woo Choi; Chang Hee Nam
Publication Date
2016-07
Journal
PHYSICS OF PLASMAS, v.23, no.7, pp.073105 -
Publisher
AMER INST PHYSICS
Abstract
Measurement of angularly dependent spectra of betatron gamma-rays radiated by GeV electron beams from laser wakefield accelerators (LWFAs) are presented. The angle-resolved spectrum of betatron radiation was deconvolved from the position dependent data measured for a single laser shot with a broadband gamma-ray spectrometer comprising four-quadrant sectored range filters and an unfolding algorithm, based on the Monte Carlo code GEANT4. The unfolded gamma-ray spectra in the photon energy range of 0.1-10 MeV revealed an approximately isotropic angular dependence of the peak photon energy and photon energy-integrated fluence. As expected by the analysis of betatron radiation from LWFAs, the results indicate that unpolarized gamma-rays are emitted by electrons undergoing betatron motion in isotropically distributed orbit planes. © 2016 Author(s)
URI
https://pr.ibs.re.kr/handle/8788114/2758
ISSN
1070-664X
Appears in Collections:
Center for Relativistic Laser Science(초강력 레이저과학 연구단) > Journal Papers (저널논문)
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