Two-stream instability in the magnetic slit of an electromagnetic trap

Pankrat'ev, Yu. I.; Naboka, V. A.; Nozdrachev, M. G.; Ponomarenko, E. F.; Lavrent'ev, O.A.; Safronov, B.G.

doi:10.1007/bf01375773

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“…The attainment of higher plasma density has been a major concern for the reactor prospects of MEPC devices. The plasma density appears to scale proportional to B2 [122], provided that the magnetic field duration is long enough for density accumulation. The central plasma density n is found to he significantly higher than the electron density n, in the anode region, but T, = = 0.05q5,.…”

Section: Density Temperature and Confinement Time Scalingsmentioning

confidence: 99%

Magnetic electrostatic plasma confinement

Dolan¹

1994

Plasma Phys. Control. Fusion

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Electrostatic plasma confinement and magnetic electrostatic plasma confinement (MEPC) have been studied for four decades. The multiple potential well hypothesis, postulated to explain high neutron yields from Hinch's colliding beam experiment, has been supported by several pieces of evidence, but results were inconclusive. Magnetic shielding of the grid was developed to reduce the required beam current and to prevent grid overheating. Electrostatic plugging of magnetic cusps evolved to a similar confipuration. Due to low budgets, early MEPC experiments used spindle cusps, which are poor for plasma confinement. Later experiments used multipole cusps or a linear set of ring cusps, which have larger volnmes of field-free plasma. To keep the self-shielding voltage drop A+ S 100 kV, the electron density n, in the anode gap should be less than about 10'9m-3. The central plasma density can be an order of magnitude higher. The ATOLL toroidal quadrupole had anomalous electron energy transport, but the Jupiter-2M linear set of ring cusps achieved a transport rate about a factor of two above the classical rate. With near-classical transport, a power gain ratio Q = 1 0 is predicted for a reactor with r p = 3 m , B,=6T, and applied voltage + , =400 kV. Besides producing electricity and synthetic fuels, MEPC reactors could be used for heavy ion beams sources and neutIon generators. The main issues of concern for MEPC reactor development are electron transport, plasma purity and electrode alignment and voltage holding.= 100 kV, zP = 0.1 s and d = 0.001 m, this equation gives R > 2.5 m. E y r e 7. Cutaway view of a few grid wires with currents flowing out (+) and into (-) the plane of the drawing. The ellipses represent magnetic field lines.

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Section: Density Temperature and Confinement Time Scalingsmentioning

confidence: 99%

Magnetic electrostatic plasma confinement

Dolan¹

1994

Plasma Phys. Control. Fusion

View full text Add to dashboard Cite

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Two-stream instability in the magnetic slit of an electromagnetic trap

Cited by 1 publication

References 1 publication

Magnetic electrostatic plasma confinement

Magnetic electrostatic plasma confinement

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