近临界密度等离子体相对强辐射的多普勒移位产生同步x射线和中红外脉冲

IF 4.7 1区物理与天体物理 Q1 PHYSICS, MULTIDISCIPLINARY

Matter and Radiation at Extremes Pub Date : 2022-07-08 DOI:10.1063/5.0116660

N. A. Mikheytsev, A. Korzhimanov

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引用次数: 2

摘要

结果表明，当相对论强度的超短激光脉冲从接近临界密度的等离子体边界反射时，多普勒频移导致高频(高达x射线)和低频(中红外)范围内的强辐射产生。在3µm以上波长范围内的能量转换效率可以达到百分之几，这使得在中红外范围内获得相对强的脉冲成为可能。这些脉冲与紫外线和x射线范围内的高谐波同步，这为高精度泵浦探针测量提供了机会，特别是激光诱导电子衍射和瞬态吸收光谱。

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Generation of synchronized x-rays and mid-infrared pulses by Doppler-shifting of relativistically intense radiation from near-critical-density plasmas

It is shown that when relativistically intense ultrashort laser pulses are reflected from the boundary of a plasma with a near-critical density, the Doppler frequency shift leads to generation of intense radiation in both the high-frequency (up to the x-ray) and low-frequency (mid-infrared) ranges. The efficiency of energy conversion into the wavelength range above 3 µm can reach several percent, which makes it possible to obtain relativistically intense pulses in the mid-infrared range. These pulses are synchronized with high harmonics in the ultraviolet and x-ray ranges, which opens up opportunities for high-precision pump–probe measurements, in particular, laser-induced electron diffraction and transient absorption spectroscopy.

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来源期刊

Matter and Radiation at Extremes Physics and Astronomy-Atomic and Molecular Physics, and Optics

CiteScore

8.60

自引率

9.80%

发文量

160

审稿时长

15 weeks

期刊介绍： Matter and Radiation at Extremes (MRE), is committed to the publication of original and impactful research and review papers that address extreme states of matter and radiation, and the associated science and technology that are employed to produce and diagnose these conditions in the laboratory. Drivers, targets and diagnostics are included along with related numerical simulation and computational methods. It aims to provide a peer-reviewed platform for the international physics community and promote worldwide dissemination of the latest and impactful research in related fields.