Electromagnetic radiations from laser interaction with gas-filled Hohlraum. (8th December 2017)

• Record Type: Journal Article
• Authors: Yang, Ming; Yang, Yongmei; Li, Tingshuai; Yi, Tao; Wang, Chuanke; Liu, Shenye; Jiang, Shaoen; Ding, Yongkun
• Is Part Of: Laser physics letters. Volume 15:Number 1(2018:Jan.)
• Publication Date: 2017-12-08
• Subjects: Shenguang-III laser facility -- electromagnetic pulse -- gas-filled hohlraum -- x-ray energy; Lasers -- Periodicals; Physics -- Periodicals; 621.366
• DOI: 10.1088/1612-202X/aa94ec
• Languages: English
• ISSNs: 1612-2011

Abstract

Abstract: The emission of intensive electromagnetic pulse (EMP) due to laser-target interactions at the ShenGuang-III laser facility has been evaluated by probes. EMP signals measured using the small discone antennas demonstrated two variation trends including a bilateral oscillation wave and a unilateral oscillation wave. The new trend of unilateral oscillation could be attributed to the hohlraum structure and low- Z gas in the hohlraum. The EMP waveform showed multiple peaks when the gas-filled hohlraum was shot by the high-power laser. Comparing the EMP signals with the verification of stimulated Raman scattering energy and hard x-ray energy spectrum, we found that the intensity of EMP signals decreased with the increase of the hohlraum size. The current results are expected to offer preliminary information to study physical processes on laser injecting gas-filled hohlraums in the National Ignition Facility implementation.