Double-pulse Nd:glass laser system for Thomson scattering diagnosis of high-temperature plasmas

Journal Article · Mon Aug 01 00:00:00 EDT 1988 · Rev. Sci. Instrum.; (United States)

DOI:https://doi.org/10.1063/1.1140256· OSTI ID:6906412

Dooling, J C; York, T M

Beam properties of a twice Q-switched Nd:glass laser operated at 1053 and 527 nm have been examined with respect to energy, pulse width, divergence, and conversion efficiency at a pulse separation of 75 ..mu..s. Q switching occurred twice within a flashlamp burst (FWHM: 160--175 ..mu..s). Maximum IR energies of 24 joules per pulse (Jpp) were measured with pulse widths of 25 and 40 ns and divergence values of 0.6 and 0.7 mrad for the first and second pulses, respectively. Maximum second-harmonic energies of 14 J (single pulse) and 4 Jpp were measured with peak power-density conversion efficiencies of 45% and 30%. Use of this laser at 1053 nm, in conjunction with generation III GaAs detectors, offers improvement over current source/detection systems (ruby/S-20) for diagnosis of high-temperature plasmas (T/sub e/ >10 keV).

• Research Organization: The Pennsylvania State University, University Park, Pennsylvania 16802
• OSTI ID: 6906412
• Journal Information: Rev. Sci. Instrum.; (United States), Vol. 59:8
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
NEODYMIUM LASERS
OPERATION
PLASMA DIAGNOSTICS
THOMSON SCATTERING
TOKAMAK DEVICES
INFRARED RADIATION
PHOTODETECTORS
PULSES
Q-SWITCHING
CLOSED PLASMA DEVICES
ELECTROMAGNETIC RADIATION
INELASTIC SCATTERING
LASERS
RADIATIONS
SCATTERING
SOLID STATE LASERS
THERMONUCLEAR DEVICES
700102* - Fusion Energy- Plasma Research- Diagnostics