Study of backward terahertz radiation from intense picosecond laser-solid interactions using a multichannel calorimeter system

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

Research output: Contribution to journalArticle

Abstract

A multichannel calorimeter system is designed and constructed which is capable of delivering single-shot and broad-band spectral measurement of Terahertz radiation generated in intense laser-plasma interactions. The generation mechanism of backward THz radiation is studied using the multichannel calorimeter system in an intense picosecond laser-solid interaction experiment. The dependence of the BTR energy and spectrum on laser energy, target thickness and pre-plasma scale length is obtained. These results indicate that coherent transition radiation is responsible for the low frequency component (< 1 THz) of BTR. It is also observed that a largescale pre-plasma primarily enhance the high frequency component (> 3 THz) of BTR.
LanguageEnglish
Article numbere6
Number of pages7
JournalHigh Power Laser Science and Engineering
Volume7
DOIs
Publication statusPublished - 22 Jan 2019

Fingerprint

Solid state lasers
Calorimeters
calorimeters
Radiation
radiation
Plasma interactions
lasers
target thickness
laser plasma interactions
Lasers
interactions
shot
low frequencies
broadband
Plasmas
energy
Experiments

Keywords

  • multichannel calorimeter
  • backward Terahertz radiation
  • generation mechanisms

Cite this

Liu, H. ; Liao, G.-Q. ; Zhang, Y.-H. ; Zhu, B.-J. ; Zhang, Z. ; Li, Y.-T. ; Scott, G. G. ; Rusby, D. ; Armstrong, C. ; Zemaityte, E. ; Bradford, P. ; Woolsey, N. ; Huggard, P. ; McKenna, P. ; Neely, D. / Study of backward terahertz radiation from intense picosecond laser-solid interactions using a multichannel calorimeter system. In: High Power Laser Science and Engineering. 2019 ; Vol. 7.
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Study of backward terahertz radiation from intense picosecond laser-solid interactions using a multichannel calorimeter system. / Liu, H.; Liao, G.-Q.; Zhang, Y.-H.; Zhu, B.-J.; Zhang, Z.; Li, Y.-T.; Scott, G. G.; Rusby, D.; Armstrong, C.; Zemaityte, E.; Bradford, P.; Woolsey, N.; Huggard, P.; McKenna, P.; Neely, D.

In: High Power Laser Science and Engineering, Vol. 7, e6, 22.01.2019.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Study of backward terahertz radiation from intense picosecond laser-solid interactions using a multichannel calorimeter system

AU - Liu, H.

AU - Liao, G.-Q.

AU - Zhang, Y.-H.

AU - Zhu, B.-J.

AU - Zhang, Z.

AU - Li, Y.-T.

AU - Scott, G. G.

AU - Rusby, D.

AU - Armstrong, C.

AU - Zemaityte, E.

AU - Bradford, P.

AU - Woolsey, N.

AU - Huggard, P.

AU - McKenna, P.

AU - Neely, D.

PY - 2019/1/22

Y1 - 2019/1/22

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AB - A multichannel calorimeter system is designed and constructed which is capable of delivering single-shot and broad-band spectral measurement of Terahertz radiation generated in intense laser-plasma interactions. The generation mechanism of backward THz radiation is studied using the multichannel calorimeter system in an intense picosecond laser-solid interaction experiment. The dependence of the BTR energy and spectrum on laser energy, target thickness and pre-plasma scale length is obtained. These results indicate that coherent transition radiation is responsible for the low frequency component (< 1 THz) of BTR. It is also observed that a largescale pre-plasma primarily enhance the high frequency component (> 3 THz) of BTR.

KW - multichannel calorimeter

KW - backward Terahertz radiation

KW - generation mechanisms

U2 - 10.1017/hpl.2018.60

DO - 10.1017/hpl.2018.60

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JO - High Power Laser Science and Engineering

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