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Journal articles on the topic 'Magnetically confined plasma'

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Published: 4 June 2021
Last updated: 28 January 2023

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1

Samm, U. "Plasma-Wall Interaction in Magnetically Confined Fusion Plasmas." Fusion Science and Technology 53, no. 2T (February 2008): 223–28. http://dx.doi.org/10.13182/fst08-a1708.

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2

Samm, U. "Plasma-Wall Interaction in Magnetically Confined Fusion Plasmas." Fusion Science and Technology 57, no. 2T (February 2010): 241–46. http://dx.doi.org/10.13182/fst10-a9415.

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3

Samm, U. "Plasma-Wall Interaction in Magnetically Confined Fusions Plasmas." Fusion Science and Technology 61, no. 2T (February 2012): 193–98. http://dx.doi.org/10.13182/fst12-a13506.

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4

IWAMAE, Atsushi. "Plasma Polarization Spectroscopy. Plasma Polarization Spectroscopy on Magnetically Confined Plasmas." Journal of Plasma and Fusion Research 78, no. 8 (2002): 738–44. http://dx.doi.org/10.1585/jspf.78.738.

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5

PALUMBO, L. J., and A. M. PLATZECK. "Magnetically confined plasma flows with helical symmetry." Journal of Plasma Physics 60, no. 3 (October 1998): 449–67. http://dx.doi.org/10.1017/s0022377898006965.

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Stationary flows with an ignorable coordinate are analysed and the differential equation for the only independent current function of the problem is obtained for the polytropic, incompressible and adiabatic cases. The possibility of confinement for the stationary symmetric plasma fluxes is then investigated and the confinement conditions are given. Some examples are solved for the particular case of helical symmetry; for general flows it is possible to construct magnetically confined plasma columns only with cylindrical shape; whereas if the plasma velocity has the direction of the ignorable coordinate, we show that it is possible to construct magnetically confined plasma columns with helical shape and plasma flux along the helices.
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6

Palumbo, L. J., and A. M. Platzeck. "Magnetically Confined Plasma Columns with Helical Symmetry." Astrophysical Journal 416 (October 1993): 656. http://dx.doi.org/10.1086/173266.

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7

Lai, C., B. Brunmeier, and R. Claude Woods. "Magnetically confined inductively coupled plasma etching reactor." Journal of Vacuum Science & Technology A: Vacuum, Surfaces, and Films 13, no. 4 (July 1995): 2086–92. http://dx.doi.org/10.1116/1.579524.

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8

LaPointe, Michael R. "Antiproton powered propulsion with magnetically confined plasma engines." Journal of Propulsion and Power 7, no. 5 (September 1991): 749–59. http://dx.doi.org/10.2514/3.23388.

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9

Caprino, Silvia, Guido Cavallaro, and Carlo Marchioro. "On a Magnetically Confined Plasma with Infinite Charge." SIAM Journal on Mathematical Analysis 46, no. 1 (January 2014): 133–64. http://dx.doi.org/10.1137/130916527.

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10

Rukhadze, A. A., and B. Shokri. "Oscillations of a thin magnetically confined plasma layer." Physics Letters A 232, no. 1-2 (July 1997): 115–18. http://dx.doi.org/10.1016/s0375-9601(97)00363-0.

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11

Dobran, Flavio. "Fusion energy conversion in magnetically confined plasma reactors." Progress in Nuclear Energy 60 (September 2012): 89–116. http://dx.doi.org/10.1016/j.pnucene.2012.05.008.

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12

Ma, Jun, Wenfeng Guo, and Zhi Yu. "Simulating Magnetohydrodynamic Instabilities with Conservative Perturbed MHD Model Using Discontinuous Galerkin Method." Communications in Computational Physics 21, no. 5 (March 27, 2017): 1429–48. http://dx.doi.org/10.4208/cicp.oa-2016-0095.

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AbstractIn magnetically confined plasma research, the understandings of small and large perturbations at equilibrium are both critical for plasma controlling and steady state operation. Numerical simulations using original MHD model can hardly give clear picture for small perturbations, while non-conservative perturbed MHD model may break conservation law, and give unphysical results when perturbations grow large after long-time computation. In this paper, we present a nonlinear conservative perturbed MHD model by splitting primary variables in original MHD equations into equilibrium part and perturbed part, and apply an approach in the framework of discontinuous Galerkin (DG) spatial discretization for numerical solutions. This enables high resolution of very small perturbations, and also gives satisfactory non-smooth solutions for large perturbations, which are both broadly concerned in magnetically confined plasma research. Numerical examples demonstrate satisfactory performance of the proposed model clearly. For small perturbations, the results have higher resolution comparing with the original MHD model; for large perturbations, the non-smooth solutions match well with existing references, confirming reliability of the model for instability investigations in magnetically confined plasma numerical research.
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13

BARBARINO, S., and F. CONSOLI. "Study of the asymmetric magnetic field confining the plasma in an experimental ECR set-up." Journal of Plasma Physics 76, no. 5 (November 12, 2009): 763–76. http://dx.doi.org/10.1017/s0022377809990365.

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AbstractThe detailed description of the asymmetric magnetostatic field, used to confine a plasma in a typical electron cyclotron resonance set-up, and of the related resonance surface, associated with an electromagnetic wave feeding the source, has been obtained by means of exact expressions, employing complete elliptic integrals. This field representation is necessary in the studies regarding particles magnetically confined in these apparatuses.
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14

Carbone, V., L. Sorriso-Valvo, E. Martines, V. Antoni, and P. Veltri. "Intermittency and turbulence in a magnetically confined fusion plasma." Physical Review E 62, no. 1 (July 1, 2000): R49—R52. http://dx.doi.org/10.1103/physreve.62.r49.

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15

Politzer, P. A. "Observation of Avalanchelike Phenomena in a Magnetically Confined Plasma." Physical Review Letters 84, no. 6 (February 7, 2000): 1192–95. http://dx.doi.org/10.1103/physrevlett.84.1192.

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16

Barberis, T., F. Porcelli, and A. Yolbarsop. "Fast-ion-driven vertical modes in magnetically confined toroidal plasmas." Nuclear Fusion 62, no. 6 (April 5, 2022): 064002. http://dx.doi.org/10.1088/1741-4326/ac5ad0.

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Abstract A new type of fast particle instability involving axisymmetric modes in magnetic fusion tokamak plasmas is presented. The relevant dispersion relation involves three roots. One corresponds to a vertical plasma displacement that, in the absence of active feedback stabilization, grows on the wall resistivity time scale. The other two, oscillating close to the poloidal Alfvén frequency, are normally damped by wall resistivity. The resonant interaction with fast ions can drive the oscillatory roots unstable. Resonance conditions, stability thresholds and experimental evidence are discussed.
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17

Frank, Jodi Ackerman. "Two co-existing turbulent regimes discovered in magnetically confined plasma." Scilight 2021, no. 11 (March 12, 2021): 111104. http://dx.doi.org/10.1063/10.0003799.

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18

Kiessling, M. K. H., and T. Neukirch. "Negative specific heat of a magnetically self-confined plasma torus." Proceedings of the National Academy of Sciences 100, no. 4 (February 7, 2003): 1510–14. http://dx.doi.org/10.1073/pnas.252779099.

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19

Bazzani, A., M. Malavasi, S. Siboni, C. Pellacani, S. Rambaldi, and G. Turchetti. "Poincaré map and anomalous transport in a magnetically confined plasma." Il Nuovo Cimento B Series 11 103, no. 6 (June 1989): 659–68. http://dx.doi.org/10.1007/bf02753830.

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20

Meeker, D. J., J. H. Hammer, and C. W. Hartman. "A High Efficiency I.C.F. Driver Employing Magnetically Confined Plasma Rings." Fusion Technology 8, no. 1P2B (July 1985): 1191–97. http://dx.doi.org/10.13182/fst85-a39929.

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21

Stamate, E., K. Inagaki, K. Ohe, and G. Popa. "On energetic electrons in a multipolar magnetically confined Ar plasma." Journal of Physics D: Applied Physics 32, no. 6 (January 1, 1999): 671–74. http://dx.doi.org/10.1088/0022-3727/32/6/012.

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22

Iida, Motomi, Sadao Masamune, and Hiroshi Oshiyama. "High-Density Current Injection to Magnetically Confined Plasmas with a Miniature Plasma Source." Japanese Journal of Applied Physics 39, Part 1, No. 4A (April 15, 2000): 1903–7. http://dx.doi.org/10.1143/jjap.39.1903.

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23

Zhipeng, Ni, Wang Liangbin, Chen Zhiyou, Zhang Yong, Wang Futang, and LI Jiangang. "Electromagnetic Calculation and Plasma Leakage Rate Analysis of the Magnetically Confined Plasma Rocket." Plasma Science and Technology 10, no. 2 (April 2008): 211–15. http://dx.doi.org/10.1088/1009-0630/10/2/15.

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24

Ren, Linyuan, Yanan Wang, Weidong Ding, Anbang Sun, Burak Karadag, Zichen Deng, and Jinyue Geng. "Investigation of a novel ring-cusp magnetically confined plasma bridge neutralizer." Review of Scientific Instruments 93, no. 3 (March 1, 2022): 034501. http://dx.doi.org/10.1063/5.0082102.

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The plasma bridge neutralizer (PBN) based on a tungsten filament is a promising technique of a thermionic DC electron source where a hot filament is immersed in an inert gas flow and electrons are “bridged” from a small orifice to the ion beam. PBNs have been widely used in space propulsion and industrial applications due to their relatively simple structure and low power consumption. However, they have well-known disadvantages, namely, low emission current density and short lifetime. In this article, we propose a novel ring-cusp magnetically confined PBN (RCM-PBN) to address these issues. In the RCM-PBN, electrons are confined by a ring-cusp magnetic field, which improves the ionization efficiency and reduces the discharge chamber wall losses. Electrical insulation of the orifice plate from the chamber wall prevents a large number of electrons from being collected by the orifice plate, which greatly improves the extracted electron current. The effects of different operating parameters on the extracted electron current were studied through experiments. It was found that the increase in the extracted electron current with the extraction voltage was related to the anode spot formation. Analysis of the gas utilization factor and electron extraction cost shows that the optimal operating condition was obtained at an argon mass flow rate of 1.2 SCCM and a heater power of 45 W. At its optimum, a stable electron current of 1.1 A was extracted from the RCM-PBN with a gas utilization factor of 12.8 and an electron extraction cost of 143 W/A.
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25

Pérès, I., and J. Margot. "The power balance of a magnetically confined surface-wave plasma column." Plasma Sources Science and Technology 5, no. 4 (November 1, 1996): 653–61. http://dx.doi.org/10.1088/0963-0252/5/4/007.

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26

Kim, June Young, K. S. Chung, Seongcheol Kim, Jong Hyeon Ryu, Kyoung-Jae Chung, and Y. S. Hwang. "Thermodynamics of a magnetically expanding plasma with isothermally behaving confined electrons." New Journal of Physics 20, no. 6 (June 20, 2018): 063033. http://dx.doi.org/10.1088/1367-2630/aac877.

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27

Pérès, I., M. Fortin, and J. Margot. "The radial structure of a magnetically confined surface‐wave plasma column." Physics of Plasmas 3, no. 5 (May 1996): 1754–69. http://dx.doi.org/10.1063/1.871694.

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28

Simintzis, Ch, G. N. Throumoulopoulos, G. Pantis, and H. Tasso. "Analytic magnetohydrodynamic equilibria of a magnetically confined plasma with sheared flows." Physics of Plasmas 8, no. 6 (June 2001): 2641–48. http://dx.doi.org/10.1063/1.1371768.

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29

May, M. J., M. Finkenthal, V. Soukhanovskii, D. Stutman, H. W. Moos, D. Pacella, G. Mazzitelli, K. Fournier, W. Goldstein, and B. Gregory. "Benchmarking atomic physics models for magnetically confined fusion plasma physics experiments." Review of Scientific Instruments 70, no. 1 (January 1999): 375–78. http://dx.doi.org/10.1063/1.1149410.

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30

Borgohain, A., and P. N. Deka. "Electrostatic instability in magnetically confined inhomogeneous plasma driven by nonlinear force." Physics Letters A 378, no. 10 (February 2014): 790–94. http://dx.doi.org/10.1016/j.physleta.2014.01.012.

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31

Hammer, James H., Charles W. Hartman, James L. Eddleman, and Harry S. McLean. "Experimental Demonstration of Acceleration and Focusing of Magnetically Confined Plasma Rings." Physical Review Letters 61, no. 25 (December 19, 1988): 2843–46. http://dx.doi.org/10.1103/physrevlett.61.2843.

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32

Drake, J. R., J. A. Malmberg, and the EXTRAP T2R Team. "Experimental Studies of MHD Dynamics in a RFP Magnetically Confined Plasma." Contributions to Plasma Physics 44, no. 56 (September 2004): 503–7. http://dx.doi.org/10.1002/ctpp.200410071.

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33

YOSHIKAWA, M., Y. OKAMOTO, E. KAWAMORI, Y. WATANABE, C. WATABE, T. FURUKAWA, Y. KUBOTA, et al. "SPACE-RESOLVING VUV AND SOFT X-RAY SPECTROSCOPY IN THE TANDEM MIRROR GAMMA 10 PLASMA." Surface Review and Letters 09, no. 01 (February 2002): 555–59. http://dx.doi.org/10.1142/s0218625x02002634.

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Vacuum ultraviolet (VUV) and soft X-ray (SX) spectroscopic measurements are important means to diagnose radiation power loss, impurity ion densities and effective charge of confined plasma, Z eff , in magnetically confined plasmas such as fusion plasmas. We have constructed space- and time-resolving flat-field VUV (150–1050Å) and SX (20–350Å) spectrographs by using aberration-corrected concave gratings with varied line spacing. Absolute calibration experiments have been conducted at the Photon Factory in the High Energy Accelerator Research Organization. Absolute sensitivities of the VUV and SX spectrographs have been obtained for the two (S and P) polarization geometries. Thus, absolute intensities of emission spectra from impurity ions can be measured together with their radial distributions in plasmas. The total radiation power was determined to be less than 6 kW within ±20% of error in our normal plasma operation. Density profiles of impurity ions were reduced by using absolute emissivities of impurity lines and a collisional-radiative model. Moreover, the value of Z eff is estimated to be 1.00 in the tandem mirror GAMMA 10 plasma.
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34

Panta, S. R., D. E. Newman, P. W. Terry, and R. Sanchez. "Control of internal transport barriers in magnetically confined tokamak burning plasmas." Physics of Plasmas 29, no. 12 (December 2022): 122503. http://dx.doi.org/10.1063/5.0123121.

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The initiation, termination, and control of internal transport barriers associated with E × B flow shear near local minima of magnetic shear are examined for burning plasmas to determine if the positive feedback loops between profiles, instability, transport, and flow shear operate in regimes with fusion self-heating. A five-field transport model for the evolution of profiles of density, ion and electron temperature, ion and electron fluctuations, and radial electric field is utilized to examine the efficacy of controls associated with external inputs of heat and particles, including neutral beam injection, RF, pellets, and gas puffing. The response of the plasma to these inputs is studied in the presence of self-heating. The latter is affected by the external inputs and their modification of profiles and is, therefore, not an external control. Provided sufficient external power is applied, internal transport barriers can be created and controlled, both in ion and electron channels. Barrier control is sensitive to the locations of power deposition and pellet ablation, as well as temporal sequencing of external inputs.
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35

Mejia, S. R., T. Chau, R. D. McLeod, K. C. Kao, and H. C. Card. "Electron cyclotron resonance microwave-plasma etching." Canadian Journal of Physics 65, no. 8 (August 1, 1987): 856–58. http://dx.doi.org/10.1139/p87-131.

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Electron cyclotron resonance microwave-plasma etching of Si and SiO2 using a (CF4 + O2) gas mixture is investigated in a magnetically confined plasma. High etch rates have been obtained at 0.8 Torr pressure, where the etching mechanism may be due primarily to neutral active species (1 Torr = 133 Pa). The high etch rate can be explained by a high dissociation efficiency of the ECR microwave plasma, and the directionality by carbon deposits associated with it. The magnetic confinement is likely to play a role similar to that of ion and electron screening.
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36

Kukushkin, A. B., and V. A. Rantsev-Kartinov. "Plasma networking in magnetically confined plasmas and diagnostics of nonlocal heat transport in tokamak filamentary plasmas." Review of Scientific Instruments 70, no. 2 (February 1999): 1392–96. http://dx.doi.org/10.1063/1.1149577.

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37

BINDSLEV, Henrik, Stefan K. NIELSEN, Søren B. KORSHOLM, Fernando MEO, Poul K. MICHELSEN, Susanne MICHELSEN, Erekle L. TSAKADZE, et al. "Fast Ion Dynamics in Magnetically Confined Plasma Measured by Collective Thomson Scattering." Plasma and Fusion Research 2 (2007): S1023. http://dx.doi.org/10.1585/pfr.2.s1023.

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38

Richards, R. K., D. P. Hutchinson, C. A. Bennett, H. T. Hunter, and C. H. Ma. "Measurement of CO2laser small angle Thomson scattering on a magnetically confined plasma." Applied Physics Letters 62, no. 1 (January 4, 1993): 28–30. http://dx.doi.org/10.1063/1.108808.

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39

Rondanini, Maurizio, Carlo Cavallotti, Daria Ricci, Daniel Chrastina, Giovanni Isella, Tamara Moiseev, and Hans von Känel. "An experimental and theoretical investigation of a magnetically confined dc plasma discharge." Journal of Applied Physics 104, no. 1 (July 2008): 013304. http://dx.doi.org/10.1063/1.2948927.

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40

Pustylnik, Mikhail, Noriyasu Ohno, and Shuichi Takamura. "Control of Energetic Electron Component in a Magnetically Confined Diffusion Ar Plasma." Japanese Journal of Applied Physics 45, no. 2A (February 8, 2006): 926–32. http://dx.doi.org/10.1143/jjap.45.926.

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41

Amin, Saba, Shazia Bashir, Safia Anjum, Mahreen Akram, Asma Hayat, Sadia Waheed, Hina Iftikhar, Assadullah Dawood, and Khaliq Mahmood. "Optical emission spectroscopy of magnetically confined laser induced vanadium pentoxide (V2O5) plasma." Physics of Plasmas 24, no. 8 (August 2017): 083112. http://dx.doi.org/10.1063/1.4994067.

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42

Song, Y. P., P. D. Wang, C. M. Sotomayor Torres, and C. D. W. Wilkinson. "Magnetically confined plasma reactive ion etching and photoluminescence of GaAs quantum wires." Semiconductor Science and Technology 10, no. 10 (October 1, 1995): 1404–7. http://dx.doi.org/10.1088/0268-1242/10/10/015.

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43

Wang, Yu, Tiehua Ma, Dongxing Pei, Changxin Chen, Kaiqiang Feng, Debiao Zhang, and Zhibo Wu. "Influence of Magnetically Confined Plasma on the Muzzle Velocity of Gun Projectile." IEEE Access 8 (2020): 72661–70. http://dx.doi.org/10.1109/access.2020.2987830.

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44

Nishiyama, Shogo, Kazuki Yasui, Tetsuya Nagata, Tatsuhito Yoshikawa, Hideki Uchiyama, Rainer Schödel, Hirofumi Hatano, et al. "MAGNETICALLY CONFINED INTERSTELLAR HOT PLASMA IN THE NUCLEAR BULGE OF OUR GALAXY." Astrophysical Journal 769, no. 2 (May 14, 2013): L28. http://dx.doi.org/10.1088/2041-8205/769/2/l28.

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45

Song, Y. P. "Magnetically confined plasma reactive ion etching of GaAs/AlGaAs/AlAs quantum nanostructures." Journal of Vacuum Science & Technology B: Microelectronics and Nanometer Structures 12, no. 6 (November 1994): 3388. http://dx.doi.org/10.1116/1.587518.

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46

Bialynicki-Birula, Iwo, and Zofia Bialynicka-Birula. "Solutions of Vlasov-Maxwell equations for a magnetically confined relativistic cold plasma." Physica A: Statistical Mechanics and its Applications 133, no. 1-2 (October 1985): 228–46. http://dx.doi.org/10.1016/0378-4371(85)90065-2.

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47

van Milligen, B. Ph, B. A. Carreras, L. García, G. Grenfell, I. Voldiner, and C. Hidalgo. "The impact of radial electric fields and plasma rotation on intermittence in TJ-II." Plasma Physics and Controlled Fusion 64, no. 5 (March 30, 2022): 055006. http://dx.doi.org/10.1088/1361-6587/ac54e9.

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Abstract This work explores the impact of an imposed radial electric field on the intermittence parameter in magnetically confined plasmas. The intermittence is sensitive to both the magnetic configuration (dominant helical modes or low order rational surfaces) and to poloidal flows or radial electric fields. This behaviour was verified both in numerical turbulence calculations using a resistive magnetohydrodynamic model, and using Langmuir probe data obtained in experiments at the TJ-II stellarator. It is shown that the intermittence parameter can be used to detect when the local plasma rotation velocity, with respect to the laboratory frame of reference, is minimum.
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48

ZONCA, FULVIO. "THE PHYSICS OF BURNING PLASMAS IN TOROIDAL MAGNETIC FIELD DEVICES." International Journal of Modern Physics A 23, no. 08 (March 30, 2008): 1165–72. http://dx.doi.org/10.1142/s0217751x08040020.

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Some of the crucial physics aspects of burning plasmas magnetically confined in toroidal systems are presented from the viewpoint of nonlinear dynamics. Most of the discussions specifically refer to tokamaks, but they can be readily extended to other toroidal confinement devices. Particular emphasis is devoted to fluctuation induced transport processes of mega electron volts energetic ions and charged fusion products as well as to energy and particle transports of the thermal plasma. Long time scale behaviors due to the interplay of fast ion induced collective effects and plasma turbulence are addressed in the framework of burning plasmas as complex self-organized systems. The crucial roles of mutual positive feedbacks between theory, numerical simulation and experiment are shown to be the necessary premise for reliable extrapolations from present day laboratory to burning plasmas. Examples of the broader applications of fundamental problems to other fields of plasma physics and beyond are also given.
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49

Ren, Linyuan, Yanan Wang, Weidong Ding, Anbang Sun, Burak Karadag, Zichen Deng, and Jinyue Geng. "Discharge characteristics and mode transition of a ring-cusp magnetically confined plasma bridge neutralizer." Journal of Applied Physics 132, no. 8 (August 28, 2022): 083301. http://dx.doi.org/10.1063/5.0101904.

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The discharge mode characteristics of cathodes may strongly influence the discharge stability and performance of electrostatic thrusters. In this article, discharge characteristics and mode transition phenomenon of the ring-cusp magnetically confined plasma bridge neutralizer (RCM-PBN) were experimentally studied using argon as the working gas. The dependences of anode current and oscillation amplitude on anode voltage, argon flow rate, heater power, and cathode-to-anode distance were investigated. Plasma properties were measured and plasma plume images were taken under different discharge modes. Two distinct discharge modes were observed during the experiments: high oscillation mode and low oscillation mode. In the high oscillation mode, the plasma plume appears dim, the anode current is low, and the oscillation level is more than 2%. While in the low oscillation mode, a spot-like structure close to the orifice is observed. The plume becomes brighter, the anode current increases, and the oscillation level decreases below 2%. The RCM-PBN was found to transition into the low oscillation mode by increasing anode voltage, flow rate, heater power and by decreasing the cathode-to-anode distance.
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50

Graf, A. T., S. Brockington, R. Horton, S. Howard, D. Hwang, P. Beiersdorfer, J. Clementson, et al. "Spectroscopy on magnetically confined plasmas using electron beam ion trap spectrometers." Canadian Journal of Physics 86, no. 1 (January 1, 2008): 307–13. http://dx.doi.org/10.1139/p07-117.

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Multiple spectrometers originally designed for and used at the University of California Lawrence Livermore National Laboratory’s electron beam ion trap have found use at various magnetically confined plasma facilities. Three examples will be described. First is a soft X-ray/EUV grating spectrometer (6–150 Å), which is operating at the National Spherical Torus Experiment. Second is an EUV spectrometer with wavelength coverage up to 400 Å, which has just recently started operating at the Sustained Spheromak Physics Experiment. The last is a high-resolution transmission-grating spectrometer for visible light that has been used at the Compact Toroid Injection Experiment and is currently at the Alcator C-Mod tokamak.PACS Nos.: 39.30.+w, 52.55.–s, 32.30.Rj, 07.60.Rd, 52.70.La
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