Enhanced laser-induced plasma channels in air |
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Affiliation: | 1. Laser Fusion Research Center, China Academy of Engineering Physics, Mianyang 621900, China;2. Science and Technology on Plasma Physics Laboratory, Mianyang 621900, China;3. IFSA Collaborative Innovation Center, Shanghai Jiao Tong University, Shanghai 200240, China |
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Abstract: | Plasma is a significant medium in high-energy density physics since it can hardly be damaged. For some applications such as plasma based backward Raman amplification (BRA), uniform high-density and large-scale plasma channels are required. In the previous experiment, the plasma transverse diameter and density are 50-200 μm and 1-2×1019 cm-3, here we enhance them to 0.8 mm and 8×1019 cm-3, respectively. Moreover, the gradient plasma is investigated in our experiment. A proper plasma gradient can be obtained with suitable pulse energy and delay. The experimental results are useful for plasma physics and nonlinear optics. |
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Keywords: | plasma channel laser-induced plasma plasma measurement plasma optics |
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