A fluid model for ion heating due to ionization in a plasma flow

Dorf, M.; Semenov, V. E.; Zorin, V. G.

doi:10.1063/1.2976367

Cited by 6 publications

(3 citation statements)

References 19 publications

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“…At this experimental setup plasma is created and electrons are heated by 37.5 GHz gyrotron radiation with power up to 100 kW in a simple mirror trap under ECR condition. Using of such high frequency of microwave (in comparison with conventional ECRIS's) allows to create and sustain plasma with significantly higher density (up to 2•10 13 cm −3 ) [9] and at the same time to maintain the main advantages of conventional ECRIS such as high ionization degree and low ion energy (on the order of a few eV) [10]. Reaching such high plasma density relies on the fact that the critical density for the microwave radiation grows with the frequency squared.…”

Section: Jinst 7 P10010mentioning

confidence: 99%

High current proton source based on ECR discharge sustained by 37.5 GHz gyrotron radiation

et al. 2012

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Formation of hydrogen ion beams with high intensity and low transverse emittance is one of the key challenges in accelerator technology. Present work is devoted to experimental investigation of proton beam production from dense plasma (Ne > 10 13 cm −3 ) of an ECR discharge sustained by 37.5 GHz, 100 kW gyrotron radiation at SMIS 37 facility at IAP RAS. The anticipated advantages of the SMIS 37 gasdynamic ion source over the current state-of-the-art proton source technology based on 2.45 GHz hydrogen discharges are described. Experimental result obtained with different extraction configurations i.e. single-and multi-aperture systems are presented. It was demonstrated that ultra bright proton beam with approximately 4.5 mA current and 0.03 π•mm•mrad normalized emittance can be produced with the single-aperture (1 mm in diameter) extraction, the corresponding brightness being 5 A/(π•mm•mrad) 2 . For production of high current beams a multi-aperture extractor was used resulting to a record of 200 mA / 1.1 π•mm•mrad normalized emittance proton beam. The species fraction i.e. the ratio of H + to H + 2 current was recorded to be > 90 % for all extraction systems. A possibility of further enhancement of the beam parameters by improvements of the extraction system and its power supply is discussed.

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Section: Jinst 7 P10010mentioning

confidence: 99%

High current proton source based on ECR discharge sustained by 37.5 GHz gyrotron radiation

et al. 2012

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“…In other applications of physics, such consideration had been taken into account in the study of ion heating in a plasma flow (cf. [5]). The modified PNP system has more complicated nonlinearities than the original PNP system but with the same equilibrium states.…”

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confidence: 99%

“…In other applications of physics, such consideration had been taken into account in the study of ion heating in a plasma flow (cf. [5]).…”

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confidence: 99%

Transport of charged particles: Entropy production and Maximum Dissipation Principle

Hsieh

Hyon

Lee

et al. 2015

Journal of Mathematical Analysis and Applications

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In order to describe the dynamics of crowded ions (charged particles), we use an energetic variational approach to derive a modified Poisson-Nernst-Planck (PNP) system which includes an extra dissipation due to the effective velocity differences between ion species. Such a system has more complicated nonlinearities than the original PNP system but with the same equilibrium states. Using Galerkin's method and Schauder's fixed-point theorem, we develop a local existence theorem of classical solutions for the modified PNP system. Different dynamics (but same equilibrium states) between the original and modified PNP systems can be represented by numerical simulations using finite element method techniques.

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