• High Power Laser Science and Engineering
  • Vol. 2, Issue 1, 010000e5 (2014)
X.H. Yuan1、2, Y. Fang1, D.C. Carroll3、4, D.A. MacLellan3, F. Du2, N. Booth4, M. Burza5, M. Chen1, R.J. Gray3, Y.F. Jin1, Y.T. Li2, Y. Liu1, D. Neely4, H. Powell3, G. Scott3, C.-G. Wahlstrom5, J. Zhang1、2, P. McKenna3、*, and and Z.M. Sheng6
Author Affiliations
  • 1Key Laboratory for Laser Plasmas (Ministry of Education) and Department of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240, China
  • 2Beijing National Laboratory of Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
  • 3SUPA Department of Physics, University of Strathclyde, Glasgow G4 0NG, UK
  • 4Central Laser Facility, Rutherford Appleton Laboratory, Oxfordshire OX11 0QX, UK
  • 5Department of Physics, Lund University, S-22100 Lund, Sweden
  • 63Key Laboratory for Laser Plasmas (Ministry of Education) and Department of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240, China
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    Abstract

    The first experimental measurements of intense (-7×1019 W cm-2) laser-driven terahertz (THz) radiation from a solid target which is preheated by an intense pulse of laser-accelerated protons is reported. The total energy of the THz radiation is found to decrease by approximately a factor of 2 compared to a cold target reference. This is attributed to an increase in the scale length of the preformed plasma, driven by proton heating, at the front surface of the target, where the THz radiation is generated. The results show the importance of controlling the preplasma scale length for THz production.
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    X.H. Yuan, Y. Fang, D.C. Carroll, D.A. MacLellan, F. Du, N. Booth, M. Burza, M. Chen, R.J. Gray, Y.F. Jin, Y.T. Li, Y. Liu, D. Neely, H. Powell, G. Scott, C.-G. Wahlstrom, J. Zhang, P. McKenna, and Z.M. Sheng. Effects of target pre-heating and expansion on terahertz radiation production from intense laser-solid interactions[J]. High Power Laser Science and Engineering, 2014, 2(1): 010000e5
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    Received: Feb. 8, 2014
    Accepted: Feb. 8, 2014
    Published Online: Dec. 26, 2014
    The Author Email: P. McKenna (paul.mckenna@strath.ac.uk)