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초강력레이저과학연구단
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High-energy betatron source driven by a 4-PW laser with applications to non-destructive imaging

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Title
High-energy betatron source driven by a 4-PW laser with applications to non-destructive imaging
Author(s)
Calin Ioan Hojbota; Mohammad Mirzaie; Do Yeon Kim; Tae Gyu Pak; Mohammad Rezaei-Pandari; Vishwa Bandhu Pathak; Jong Ho Jeon; Jin Woo Yoon; Jae Hee Sung; Seong Ku Lee; Chul Min Kim; Ki-Yong Kim; Chang Hee Nam
Publication Date
2023-10
Journal
European Physical Journal A, v.59, no.10
Publisher
Springer Verlag
Abstract
Petawatt-class lasers can produce multi-GeV electron beams through laser wakefield electron acceleration. As a by-product, the accelerated electron beams can generate synchrotron-like radiation known as betatron radiation. In the present work, we measure the properties of the radiation produced from 2 GeV, 215 pC electron beams, which shows a broad radiation spectrum with a critical energy of 515 keV, extending up to MeV photon energies and 10 mrad divergence. Due to its high energy and flux, such radiation is an ideal candidate for γ -ray radiography of dense objects. We employed a compact betatron radiation setup operated at relatively high-repetition rates (0.1 Hz) and used it to scan cm-sized objects: a DRAM circuit, BNC and SMA connectors, a padlock and a gas jet nozzle. GEANT4 simulations were carried out to reproduce the radiograph of the gas jet. The setup and the radiation source can reveal the interior structure of the objects at the sub-mm level, proving that it can further be applied to diagnose cracks or holes in various components. The radiation source presented here is a valuable tool for non-destructive inspection and for applications in high-energy-density physics such as nuclear fusion.
URI
https://pr.ibs.re.kr/handle/8788114/14096
DOI
10.1140/epja/s10050-023-01159-5
ISSN
1434-6001
Appears in Collections:
Center for Relativistic Laser Science(초강력 레이저과학 연구단) > 1. Journal Papers (저널논문)
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