Observation of Burst Intensification by Singularity Emitting Radiation generated from relativistic plasma with a high-intensity laser

Sagisaka, A. and Ogura, K. and Esirkepov, T.Zh. and Neely, D. and Pikuz, T.A. and Koga, J.K. and Fukuda, Y. and Kotaki, H. and Hayashi, Y. and Gonzalez-Izquierdo, B. and Huang, K. and Bulanov, S.V. and Kiriyama, H. and Kondo, K. and Kawachi, T. and Kando, M. and Pirozhkov, A.S. (2020) Observation of Burst Intensification by Singularity Emitting Radiation generated from relativistic plasma with a high-intensity laser. High Energy Density Physics, 36. 100751. ISSN 1574-1818

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    Abstract

    Coherent x-rays via the Burst Intensification by Singularity Emitting Radiation (BISER) mechanism are generated from relativistic plasma in helium gas target. A broad modulation of the BISER spectrum, which is significantly wider than the harmonic order, is observed and characterized. In particular, we found that the modulation period can be as large as 41 eV.