Cross-Beam Energy Transfer Experiments at High Ion-Acoustic Wave Amplitudes
Abstract
The tunable OMEGA port 9 (TOP9) laser on OMEGA was used to perform cross-beam energy transfer (CBET) experiments in a gas-jet plasma where it interacted with one or five other 351-nm UV beams to study the limitations of linear CBET modeling. The TOP9 laser is a wavelength-tunable UV beam which enables CBET experiments in a stationary plasma. The frequency of the TOP9 beam was set so that the beat frequency generated with other UV pump beams was resonant with the ion-acoustic wave frequency of the gas-jet plasma. By changing the intensity of the TOP9 probe beam, the amplitude of the resonantly excited ion-acoustic waves was scaled from low amplitudes (dn/n <0.7%) to high amplitudes (dn/n >2.5%), where ion-wave saturation mechanisms were expected to limit the amount of energy transfer in the interaction.
This material is based upon work supported by the Department of Energy National Nuclear Security Administration under Award Number DE-NA0003856.- Publication:
-
APS Division of Plasma Physics Meeting Abstracts
- Pub Date:
- 2019
- Bibcode:
- 2019APS..DPPGO6005H