The Heavy Ion Beam Probing Development for WEGA Stellarator

Krupnik, L. I.; Deshko, G. N.; Zhezhera, A.; Chmyga, A. A.; Komarov, A. D.; Kozachek, A.S.; Melnikov, A. V.; Perfilov, S.V.; Otte, M.; Shubert, M.

doi:10.13182/fst06-a1246

Cited by 9 publications

(6 citation statements)

References 5 publications

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“…The area of HIBP developments was expanded significantly after presentation our results at the international conferences. HIВP researches were performed in tokamaks: TM-4 (Moscow, 1978(Moscow, -1980, T-10 (Moscow, 1990-2018) [11][12][13], Tuman-3M (St. Petersburg, 1983 -now) [14], TJ-I (Madrid, 1991(Madrid, -1995 [15,16] and in stellarators: TJ-II (Madrid, 1996  now) [17], WEGA (Greifswald, 2004(Greifswald, -2009 [18][19][20][21] and Uragan-2M (Kharkiv, 1985  calculations, 2012  installation) [22]. Main parameters of devices and HIBPs are collected in Table 1.…”

Section: Implementation Of Hibp On Tokamaks and Stellaratorsmentioning

confidence: 99%

50 Years of Hot Plasma Diagnostic With Heavy Ion Beam Probing (Hibp) at the Kharkov Institute of Physics and Technology

Krupnik¹

2021

Problems of Atomic Science and Technology

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An overview describes the evolution of HIBP diagnostics from the origins till today. The progress in the beam technology is presented by examples of HIBPs in tokamaks and stellarators. At the beginning, HIBP provided timeaveraged measurements of plasma potential in single space location, then it evolves to time-resolved measurements of radial distributions and finally it becomes a multi-purpose diagnostics to study the temporal evolution of 2D distributions of potential and turbulence, including the long-range potential correlations with dual HIBP. Highlights in plasma potential profile evolution, a link between potential, density and confinement, geodesic acoustic modes, steady and chirping Alfvén eigenmodes, turbulent particle flux are presented.

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Section: Implementation Of Hibp On Tokamaks and Stellaratorsmentioning

confidence: 99%

50 Years of Hot Plasma Diagnostic With Heavy Ion Beam Probing (Hibp) at the Kharkov Institute of Physics and Technology

Krupnik¹

2021

Problems of Atomic Science and Technology

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“…When varying the beam's angle of injection by means of the primary beamline, the sample volume scans the plasma, which enables determining the potential profile evolution several (5)(6)(7)(8)(9)(10)(11)(12)(13)(14)(15)(16)(17)(18)(19)(20) times during the discharge. The beam energy change enables the variation of the radial scan location at the plasma cross-section from shot to shot.…”

Section: Hibp Hardware and Probing Beam Featuresmentioning

confidence: 99%

“…The density in the ionization point can be obtained from the secondary beam current I t by the following relation: (1) where I b is the initial beam current, σ 12 is the effective ionization cross-section and λ the linear dimension of the SV along the trajectory.…”

Section: Hibp Hardware and Probing Beam Featuresmentioning

confidence: 99%

“…HIBP was first introduced in 1970s [5], it was later developed to the multichannel version to study the turbulent particle flux [6]. HIBP successfully operated in the middle-size tokamaks like TEXT [7], JIPPT-2U [8], JFT-2M [9], in stellarator CHS [10], and in smaller devices like TJ-I tokamak [11] and WEGA stellarator [12]. Now HIBP is in operation in the TUMAN-3M and ISSTOK tokamaks [13,14], MST reversed field pinch [15] and LHD stellarator [16].…”

Section: Introductionmentioning

confidence: 99%

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Heavy ion beam probing—diagnostics to study potential and turbulence in toroidal plasmas

et al. 2017

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Heavy ion beam probing (HIBP) is a unique diagnostics to study the core plasma potential and turbulence. Advanced HIBPs operate in the T-10 tokamak and TJ-II flexible heliac with fine focused (<1 cm) and intense (100 µA) beams. They provide measurements in the wide density interval n e = (0.3-5) × 10 19 m −3 , in a wide range of Ohmic and electron cyclotron resonance heated (ECRH) discharges with various currents at T-10, and in the wide range of magnetic configurations with ECR and neutral beam injection (NBI) heating at TJ-II. Time evolution of the radial profiles and/or local values of plasma parameters from high field side (HFS) to low field side (LFS), −1 < ρ < 1, is observed in TJ-II by 125 keV Cs + ions in a single shot, while LFS (+0.2 < ρ < 1) is observed in T-10 by 300 keV Tl + ions. Multi-slit energy analyzers provide simultaneously data on the plasma potential ϕ (by the beam extra energy), plasma density n e (by the beam current), poloidal magnetic field B pol (by the beam toroidal shift), poloidal electric filed E pol that allows one to derive the electrostatic turbulent particle flux Γ E×B . The cross-phase of density oscillations produces the phase velocity of their poloidal propagation or rotation; also it gives the poloidal mode number. Dual HIBP, consisting of two identical HIBPs located ¼ torus apart provide the long-range correlations of core plasma parameters. Low-noise high-gain electronics allows us to study broadband turbulence and quasi-coherent modes like geodesic acoustic modes and Alfvén eigenmodes.

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“…In collaboration with the Institute for Plasma Physics in Kharkov/Ukraine a Heavy Ion Beam Probe (HIBP) diagnostic is currently being tested on WEGA [7].…”

Section: Diagnostic Development Hibpmentioning

confidence: 99%

The WEGA Stellarator: Results and Prospects

Otte

Andruczyk

Holzhauer

et al. 2008

AIP Conference Proceedings

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Abstract. In this article an overview is given on results from magnetic flux surface measurements, applied ECR heating scenarios for 2.45GHz and 28GHz, fluctuation and transport studies and plasma edge biasing experiments performed in the WEGA stellarator. Examples for the development of new diagnostics and the machine control system are given that will be used at Wendelstein 7-X stellarator, which is currently under construction in Greifswald.

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The Heavy Ion Beam Probing Development for WEGA Stellarator

Cited by 9 publications

References 5 publications

50 Years of Hot Plasma Diagnostic With Heavy Ion Beam Probing (Hibp) at the Kharkov Institute of Physics and Technology

50 Years of Hot Plasma Diagnostic With Heavy Ion Beam Probing (Hibp) at the Kharkov Institute of Physics and Technology

Heavy ion beam probing—diagnostics to study potential and turbulence in toroidal plasmas

The WEGA Stellarator: Results and Prospects

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