{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,7,30]],"date-time":"2025-07-30T11:08:04Z","timestamp":1753873684490,"version":"3.41.2"},"reference-count":27,"publisher":"AIP Publishing","issue":"7","funder":[{"name":"The Institute for Basic Basic Science, South Korea","award":["IBS-R012-D1"],"award-info":[{"award-number":["IBS-R012-D1"]}]}],"content-domain":{"domain":["pubs.aip.org"],"crossmark-restriction":true},"short-container-title":[],"published-print":{"date-parts":[[2016,7,1]]},"abstract":"<jats:p>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\u201310\u2009MeV 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.<\/jats:p>","DOI":"10.1063\/1.4956447","type":"journal-article","created":{"date-parts":[[2016,7,11]],"date-time":"2016-07-11T17:00:48Z","timestamp":1468256448000},"update-policy":"https:\/\/doi.org\/10.1063\/aip-crossmark-policy-page","source":"Crossref","is-referenced-by-count":7,"title":["Measurement of angularly dependent spectra of betatron gamma-rays from a laser plasma accelerator with quadrant-sectored range filters"],"prefix":"10.1063","volume":"23","author":[{"given":"Jong Ho","family":"Jeon","sequence":"first","affiliation":[{"name":"Institute for Basic Science (IBS) 1 Center for Relativistic Laser Science, , Gwangju 61005, South Korea"}]},{"given":"Kazuhisa","family":"Nakajima","sequence":"additional","affiliation":[{"name":"Institute for Basic Science (IBS) 1 Center for Relativistic Laser Science, , Gwangju 61005, South Korea"}]},{"given":"Hyung Taek","family":"Kim","sequence":"additional","affiliation":[{"name":"Institute for Basic Science (IBS) 1 Center for Relativistic Laser Science, , Gwangju 61005, South Korea"},{"name":"Advanced Photonics Research Institute 2 , GIST, Gwangju 61005, South Korea"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-3016-8376","authenticated-orcid":false,"given":"Yong Joo","family":"Rhee","sequence":"additional","affiliation":[{"name":"Institute for Basic Science (IBS) 1 Center for Relativistic Laser Science, , Gwangju 61005, South Korea"}]},{"given":"Vishwa Bandhu","family":"Pathak","sequence":"additional","affiliation":[{"name":"Institute for Basic Science (IBS) 1 Center for Relativistic Laser Science, , Gwangju 61005, South Korea"}]},{"given":"Myung Hoon","family":"Cho","sequence":"additional","affiliation":[{"name":"Institute for Basic Science (IBS) 1 Center for Relativistic Laser Science, , Gwangju 61005, South 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