The effect of nonmonotonic radiation of a recombining plasma in a shock wave

Бойко, В. А.; Bryunetkin, B A; Bunkin, F. V.; Derzhiyev, B I; Dyakin, V M; Mayorov, S. A.; Skobelev, I. Yu.; Faenov, A. Ya.; Fedosimov, A I; Shilov, K. A.; Yakovlenko, S. I.

doi:10.1088/0741-3335/26/8/002

Cited by 5 publications

(2 citation statements)

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“…Therefore, from the standpoint of X-pinch diagnostics, the main attention should be paid to creating diagnostic methods for detection and analysis of UV and X-ray emission of the Х-pinch plasma. The experience gained in laser plasma studies [100][101][102][103][104][105][106][107][108][109][110][111][112][113][114][115] is widely used when developing X-ray diagnostics. However, many new methods for X-ray spectroscopy of hot plasma were implemented for the first time namely in Х-pinch experiments .…”

Section: X-ray Spectroscopymentioning

confidence: 99%

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X-pinch. Part I

2015

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Results of experimental studies of the Х-pinch since its invention and implementation in 1982 at the Lebedev Physical Institute are presented. The concept of the Х-pinch arose in the course of innovative experiments on studying the generation of hot dense plasma in nanosecond Z-pinches. The main idea was to localize the region occupied by the plasma and stabilize the moment of its formation. This was achieved by using a load in the form of crossed wires. The resulting plasma object turned out to be so interesting that a new scientific direction appeared in plasma physics. At present, studies in this direction are being performed in many laboratories worldwide. The term Х-pinch became conventional, and sections devoted to its study are always present at plasma conferences. Х-pinch is not only a very interesting scientific object, but also a unique source of X-ray emission with extreme parameters. The use of Х-pinches for point-projection X-ray radiography of high-energy-density objects provided many new experimental results. In some cases, the concepts of the processes occurring in matter upon fast energy deposition changed dramatically. The review consists of two parts. The first part briefly outlines the history of creation and studies of Х-pinches, describes the diagnostic techniques and devices developed during these studies, and presents the main results obtained in studying the physical processes occurring in the Х-pinch. The second part is devoted to the results of detailed studies of the Х-pinch hot spot-the region where the highest plasma parameters are achieved and which is a source of X-ray emission with extreme parameters. Some results of Х-pinch simulations are also presented.

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Section: X-ray Spectroscopymentioning

confidence: 99%

“…The scheme of the device was proposed in 1977 and used for the first time in experiments with laser-produced plasma [104,105,111,113,116,123,125,131]. The major contribution to the practical implementation of the spectrograph was made by A.B.…”

Section: X-ray Spectrographs With Spatial Resolutionmentioning

confidence: 99%

X-pinch. Part I

2015

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Spectroscopic diagnostics of plume rebound and shockwave dynamics of confined aluminum laser plasma plumes

Yeates¹,

Kennedy²

2011

Physics of Plasmas

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Generation and expansion dynamics of aluminum laser plasma plumes generated between parallel plates of varying separation (ΔZ = 2.0, 3.2, 4.0, and 5.6 mm), which confined plume expansion normal to the ablation surface, were diagnosed. Space and time resolved visible emission spectroscopy in the spectral range λ = 355-470 nm and time gated visible imaging were employed to record emission spectra and plume dynamics. Space and time resolved profiles of Ne (the electron density), Te (the electron temperature), and Tionz (the ionization temperature) were compared for different positions in the plasma plume. Significant modifications of the profiles of the above parameters were observed for plasma-surface collisions at the inner surface of the front plate, which formed a barrier to the free expansion of the plasma plume generated by the laser light on the surface of the back plate. Shockwave generation at the collision interface resulted in delayed compression of the low-density plasma plume near the inner ablation surface, at late stages in the plasma history. Upon exiting the cavity formed by the two plates, through an aperture in the front plate, the plasma plume underwent a second phase of free expansion.

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