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Prashant Kumar Singh
초강력 레이저과학 연구단
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Ultrashort PW laser pulse interaction with target and ion acceleration

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Title
Ultrashort PW laser pulse interaction with target and ion acceleration
Author(s)
Ter-Avetisyan, S; Singh, PK; Kakolee, KF; Ahmed, H; TaeWon Jeong; Scullion, C; Hadjisolomou, P; Borghesi, M; Bychenkov, VY
Publication Date
2018-11
Journal
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT, v.909, no., pp.156 - 159
Publisher
ELSEVIER SCIENCE BV
Abstract
We present the experimental results on ion acceleration by petawatt femtosecond laser solid interaction and explore strategies to enhance ion energy. The irradiation of micrometer thick (0.2-6.0 mu m) Al foils with a virtually unexplored intensity regime (8 x 10(19) W/cm(2) - 1 x 10(21) W/cm(2)) resulting in ion acceleration along the rear and the front surface target normal direction is investigated. The maximum energy of protons and carbon ions, obtained at optimized laser intensity condition (by varying laser energy or focal spot size), exhibit a rapid intensity scaling as I-0.8 along the rear surface target normal direction and I-0.6 along the front surface target normal direction. It was found that proton energy scales much faster with laser energy rather than the laser focal spot size. Additionally, the ratio of maximum ion energy along the both directions is found to be constant for the broad range of target thickness and laser intensities. A proton flux is strongly dominated in the forward direction at relatively low laser intensities. Increasing the laser intensity results in the gradual increase in the backward proton flux and leads to almost equalization of ion flux in both directions in the entire energy range. These experimental findings may open new perspectives for applications
URI
https://pr.ibs.re.kr/handle/8788114/5411
ISSN
0168-9002
Appears in Collections:
Center for Relativistic Laser Science(초강력 레이저과학 연구단) > Journal Papers (저널논문)
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