Lasers for ICF with a Controllable Function of Mutual Coherence of Radiation

Fedotov, S. I.; Feoktistov, L. P.; Осипов, М. В.; Starodub, Alexander

doi:10.1023/b:jorr.0000012486.89881.d8

Cited by 37 publications

(7 citation statements)

References 1 publication

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“…The experiments have been made with an Nd-glass laser facility "KANAL-2" with controllable coherence of radiation (Fedotov et al, 2004). The laser radiation parameters were as follows: laser pulse duration, 2.5 ns; pulse energy, 10-100 J; degree of spatial coherence, 0.05-0.015; degree of temporal coherence, 5 × 10 24 -5 × 10 23 ; degree of radiation polarization, 0.5; pulse radiation contrast .…”

Section: Methodsmentioning

confidence: 99%

Aerogel foil plasma: Forward scattering, back scattering, and transmission of laser radiation

et al. 2010

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Experimental results obtained with "Kanal-2" facility under the study of powerful laser pulse interaction with the low density microstructure media are presented and discussed in this paper. Forward scattering, back scattering, and transmission of laser radiation by aerogel foil plasma have been investigated. The temporal, spectral, and energy characteristics of both the radiation scattering in the direction of heating radiation beam and the back scattering radiation were studied; the directional diagrams of forward and back scattering radiation were obtained for v 0 and 2v 0 frequencies. Analysis of intensity redistribution on the heating beam cross-section after passing through a polymer microstructure target was carried out.

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Section: Methodsmentioning

confidence: 99%

Aerogel foil plasma: Forward scattering, back scattering, and transmission of laser radiation

et al. 2010

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“…The investigated spectra of plasma radiation from the targets made of different materials (Be, B, C, Mg, Al, Cu) were created with "Kanal-2" ("Channel-2") facility [6]. The facility was constructed and the experiments were done in the Laboratory of Laser Influence on Matter of P. N. Lebedev Physical Institute of RAS.…”

Section: Methodsmentioning

confidence: 99%

X-Ray and VUV Spectra from the Laser Plasma Produced with “Kanal-2” Facility

Kologrivov¹,

Осипов²,

Puzyrev³

et al. 2014

JMP

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The paper presents experimental results obtained on "Kanal-2" facility. Laser radiation focusing on the surface of plane magnesium targets created the high temperature plasma, which emitted X-ray and vacuum ultraviolet (VUV) radiation. This radiation spectrum was investigated with two spectrographs: the mica crystal spectrograph (working range 8.2 Å-9.6 Å) and the grazing incidence VUV spectrograph (working rage 30 Å-130 Å). A set of beryllium stepwise attenuators appended the diagnostic complex and allowed us to get an approximated picture of a continuous spectrum within the range of 2.2 Å-6.2 Å. The estimation of the plasma electron temperature T e from the ratio between the intensity of the dielectronic satellites and the resonance line gives T e ~ 180 eV. The ratio between the intensity of the resonance and intercombination lines gives the electron density of the emitting zone n e ~ 2 × 10 19 cm −3. Some lines observed within the spectral range of 8.5 Å-9.1 Å belong to none of the transitions of Mg ions. Perhaps the observed spectrum is determined by the transitions in so-called hollow ions of Mg, i.e. in the ions with unfilled inner shells. The spectra obtained with the grazing incidence spectrograph and with the minimum-directioned discrepancy iteration method of spectrum reconstruction from the attenuation curve in the beryllium stepwise attenuators are also presented.

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“…High-power lasers are widely developed and applied in many applications because of their advantages of good beam quality, high pumping efficiency, and compact structure. Especially in the inertial confinement fusion (ICF) research field, high-power lasers with a single beam of tens thousands of joules are used to ignite thermonuclear fuel to release huge amounts of energy [1]. During the working process of the high-power laser, the laser cavity is specially set to be enclosed to avoid unwanted environmental perturbation and protect the operators from laser irradiation.…”

Section: Introductionmentioning

confidence: 99%

Surface Shape Distortion Online Measurement Method for Compact Laser Cavities Based on Phase Measuring Deflectometry

et al. 2022

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Conventional phase measuring deflectometry (PMD) takes up a large measurement space and is not suitable for compact online measurement, as the liquid crystal display (LCD) has to be placed in parallel with the mirror under test. In this paper, a compact online phase measuring deflectometry (COPMD) with the LCD screen set perpendicular to the mirror under test is presented for surface shape distortion real-time measurement. The configuration of the COPMD in an enclosed laser cavity is proposed, and the principle of the method is theoretically derived by using the vector-form reflection law. Based on the analysis model, the fringe modulation regulation of the LCD is revealed, and the measurement errors caused by misalignments of the components are illustrated. The validity and flexibility of the COPMD method are verified in the experiment by using a single-actuator deformable mirror as the mirror under test and the PMD method as the comparison. The proposed COPMD method remarkably expands the application range of the conventional PMD method, as it could make efficient use of compact space and is applicable for real-time measurement in enclosed laser facilities and assembled laser systems.

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Lasers for ICF with a Controllable Function of Mutual Coherence of Radiation

Cited by 37 publications

References 1 publication

Aerogel foil plasma: Forward scattering, back scattering, and transmission of laser radiation

Aerogel foil plasma: Forward scattering, back scattering, and transmission of laser radiation

X-Ray and VUV Spectra from the Laser Plasma Produced with “Kanal-2” Facility

Surface Shape Distortion Online Measurement Method for Compact Laser Cavities Based on Phase Measuring Deflectometry

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