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• W2405327431 abstract "The production and investigation of controlled dense plasma flows has received considerable attention, which is related not only to the fundamental investigation of such plasma formations, but also to their possible application to various technological processes, such as the processing of materialsto increase toughness. This also pertains to compression flows. The existence of compression plasma flows (CPF) was theoretically predicted in [1]. Experimental verification of the possibility of generating gas-discharge CPFs was obtained by Morozov et ai. [2] in a coaxial accelerator, called a magnitoplasma compressor (MPC). This device has a core outer anode and a filtered cathode. Later, [3] reported obtaining compression flows in erosion plasma accelerators as well (erosion MPCs). A reasonably detailed analysis of the operation of such devices and the properties of the plasma formations obtained in them is given in [4-6]. The distinguishing features of compression flows are their small divergence and high plasma density. However, the presence of a near-cathode jump in the potential and the instability of the ionization zone in gas-discharge MPCs makes it impossible to vary the parameters and the composition of the compression-flow plasma over wide limits (especially at high discharge current values). And in erosion MPCs, plasma formation takes place in the middle of ablation products from the inner and outer electrodes, and of the separating insulator as well, which makes it impossible to obtain compression flows of a prescribed composition. New possibilities for obtaining compression gas-discharge plasma flows were revealed when a fundamentally new quasisteady high-power plasma accelerator (QHPA) was devised [7]. Unlike previous accelerators, QHPA is a two-stage plasma dynamic system with magnetic shielding of elements of the accelerator channel. The system operates in the ion current transport regime, in which the magnetized plasma undergoes ion-drift acceleration. The first stage of the accelerator is the input ionization block (IIB), which consists of a set of input ionization chambers (IIC). The task of this first stage is to inject completely ionized plasma currents into the second stage, which is the main accelerator channel, formed of the so-called anode and cathode transformers [7]. The anode transformer emits an ion current into the accelerator channel that is equal to the discharge current of the main stage, while the cathode transformer accepts this ion current. In addition, the magnetic systems of the anode and cathode transformers shield the solid-state elements in their structure from the action of the powerful plasma currents. One of the models of such a plasma dynamic system is a variant of the quasisteady accelerator with passive anode and semiactive cathode core transformers: the P-50M QHPA (P denotes passive; 50 is the characteristic scale, equal to the inner diameter of the anode transformer in centimeters) [8]. A compression oPerating regime was realized in this accelerator by matching the parameters of the first and second stages [8]. Subsequent experimental investigations of the physical processes in the P-50M QHPA made it possible to establish the basic laws governing the physical-processes which determine the operating regimes of these plasma dynamic systems. Probes, high-speed photography, interferometry and spectroscopy were used in these investigations. It was determined that the parameters of the plasma current exiting the QHPA depend on the nature of the distribution of the current in the accelerator channel. It was also made clear that the ratio of the ion discharge near the surfaces of the anode and cathode transformers to the value of the discharge current decisively influences the character of the current distribution in the QHPA accelerator channel. In other words, the exchange parameters in the near-anode and near-cathode regions (~a and ~c, respectively) are critical. The compression regime of QHPA operation is established when ~c > r/~a (here r/" @default.
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• W2405327431 date "1992-01-01" @default.
• W2405327431 modified "2023-09-27" @default.
• W2405327431 title "We present the results of experimental investigations of new plasma dynamic systems, which generate high-energy compression plasma flows of various compositions." @default.
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