H. Liu, G.-Q. Liao, Y.-H. Zhang, B.-J. Zhu, Z. Zhang, Y.-T. Li, G. G. Scott, D. Rusby, C. Armstrong, E. Zemaityte, P. Bradford, N. Woolsey, P. Huggard, P. McKenna, D. Neely. Study of backward terahertz radiation from intense picosecond laser–solid interactions using a multichannel calorimeter system[J]. High Power Laser Science and Engineering, 2019, 7(1): 010000e6
- High Power Laser Science and Engineering
- Vol. 7, Issue 1, 010000e6 (2019)
Fig. 1. Schematic layout of eight-channel THz calorimeter system.
Fig. 2. Linear response of the detector to energy of near-infrared and THz wavelengths.
Fig. 3. (a) Experimental setup of THz radiation spectrum measurement in ultra-intense laser–plasma interaction experiment. (b) Spectral sensitivity of the multichannel calorimeter system.
Fig. 4. (a) The measured BTR energy from a $5~\unicode[STIX]{x03BC}\text{m}$ copper target as a function of the pump laser energy. (b) The measured BTR spectrum with driven laser energy on target varying from 14 J to 54 J from a $5~\unicode[STIX]{x03BC}\text{m}$ copper target.
Fig. 5. (a) The measured BTR energy as a function of copper foil target thickness. (b) The measured BTR spectrum with copper foil target thickness varying from $1~\unicode[STIX]{x03BC}\text{m}$ to $100~\unicode[STIX]{x03BC}\text{m}$ .
Fig. 6. (a) The measured BTR energy from a $100~\unicode[STIX]{x03BC}\text{m}$ copper target as a function of delay between pre-pulse and main pulse. (b) The measured BTR spectrum from a $100~\unicode[STIX]{x03BC}\text{m}$ copper target with different delays between pre-pulse and main pulse, no pre-pulse, 400 ps and 1000 ps, respectively.
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Table 1. Factors for the spectral sensitivity of the multichannel system.
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