Characterization of the backscattered radiation from petawatt laser matter interactions.
The development of high peak power and energy laser systems require the assurance that any backscattered radiation will not lead to damage of the laser system. We present the characterization of the backscattered radiation for different target types and conditions at petawatt power levels and intensities (>10(20)W/cm2). We observe that radiation is generated between 700 and 900 nm, as well as the expected self emission and laser fundamental. The percentage of the incident light backscattered reduces as a function of the incident energy and is typically <1% for petawatt laser interactions.
Central Laser Facility, Science and Technology Facilities Council, Rutherford Appleton Laboratory, Oxfordshire, UK.
Edwina D
ED
Vernon
Ian O
IO
Musgrave
James
J
Green
Robert
R
Heathcote
Kate L
KL
Lancaster
Cedric
C
Mendes
Steve J
SJ
Hawkes
Cristina
C
Hernandez-Gomez
Dave A
DA
Pepler