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Hur, Min Sup
Computational Plasma Lab
Research Interests
  • Laser-Plasma Electron Accelerator and Table-top Femto Hard X-ray generation
  • Plasma-based THz generation
  • PIC and fluid code development
  • Reduced Laser-Plasma modelling
  • Capillary Discharge Systems for Guidied Laser Wakefield Accelerators

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Quasi-monoenergetic electron-beam generation using a laser accelerator for ultra-short X-ray sources

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dc.contributor.author Kim, J. ko
dc.contributor.author Jang, H. ko
dc.contributor.author Yoo, S. ko
dc.contributor.author Hur, Min Sup ko
dc.contributor.author Hwang, I. ko
dc.contributor.author Lim, J. ko
dc.contributor.author Kulagin, V. ko
dc.contributor.author Suk, H. ko
dc.contributor.author Choi, I. W. ko
dc.contributor.author Hafz, N. ko
dc.contributor.author Kim, H. T. ko
dc.contributor.author Hong, K.-H. ko
dc.contributor.author Yu, T. J. ko
dc.contributor.author Sung, J. H. ko
dc.contributor.author Jeong, T. M. ko
dc.contributor.author Noh, Y.-C. ko
dc.contributor.author Ko, D.-K. ko
dc.contributor.author Lee, J. ko
dc.date.available 2014-11-14T00:19:06Z -
dc.date.created 2014-11-12 ko
dc.date.issued 2007-07 -
dc.identifier.citation JOURNAL OF THE KOREAN PHYSICAL SOCIETY, v.51, no.1, pp.397 - 401 ko
dc.identifier.issn 0374-4884 ko
dc.identifier.uri https://scholarworks.unist.ac.kr/handle/201301/8766 -
dc.identifier.uri http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=34547773571 ko
dc.description.abstract Two types of electron acceleration methods have been conducted to generate quasi-monoenergetic electron beams. Multi-MeV quasi-monoenergetic high-charge electron beams were generated at Korea Electrotechnology Research Institute (KERI) from self-modulated laser wakefield acceleration by using a collimator with a 2 TW (1.4 J/700 fs) Nd:glass/Ti:sapphire hybrid laser system and a supersonic nitrogen gas jet. The peak electron energy was 3.6 MeV, and the energy spread was 4 MeV. These electron beams are useful for the generation of short-pulse X-rays in the water window region, which is 250 eV - 500 eV (2.5 - 5 nm), by using Thomson scattering. The calcualted photon spectrum indicates the scattered photon covers the water window region. This can be used for a high spatial and temperal resolution microscope for medical imaing. To generate higher-energy electron beams with small energy spread, a laser wakefield acceleration experiment with a sharp downward electron density gradient was conducted with a 100 TW laser system at Advanced Photon Research Insistitute (APRI). With the electron density gradient, some background plasma electrons could be locally injected in the laser wake wave and a small energy spread was expected. Using the pre-pulse, we could generate sharp downward electron density gradients. The gradient scale length was 20 μm for a 25 % density change. With this electron density gradient, we could get more reproducible electron beams than we could without the density gradient. ko
dc.description.statementofresponsibility close -
dc.language ENG ko
dc.publisher KOREAN PHYSICAL SOC ko
dc.subject Laser wakefield accelerator ko
dc.subject Thomson scattering ko
dc.subject X-ray generation ko
dc.title Quasi-monoenergetic electron-beam generation using a laser accelerator for ultra-short X-ray sources ko
dc.type ARTICLE ko
dc.identifier.scopusid 2-s2.0-34547773571 ko
dc.identifier.wosid 000248063000021 ko
dc.type.rims ART ko
dc.description.wostc 9 *
dc.description.scopustc 9 *
dc.date.tcdate 2015-05-06 *
dc.date.scptcdate 2014-11-12 *
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