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Title: SUMMARY OF SHERWOOD ACTIVITIES SUPPLEMENTARY REPORT

Abstract

; 8 7 8 : 5 8 8 7 = ; 7 8 : sure modes. The low pressure, high-energy mode was characterized by formation of two groups of deuterons --one about 10/sup 11/ total, the other about 10/sup 16/ ions/burst. E x B forces apparently accelerate the particles. The Scylla II preionizer produced a clean plasma with deuteron ion energies up to 800 ev. Scylla IV completion is reported; the preionizer and B/sub o/ banks are in operation. Zeeman effect measurements revealed a 0 to 10 kgauss field in the fireball before peak compression. External probe measurements on Scylla I showed the external magnetic field to rise to 55 kgauss in 1.25 mu sec with production of a hot deuterium plasma of 5 x 10/sup 16/ cm/sup 3/ density. X-ray measurements of temperature were also made. The flux of ions leaving the B field of Picket Fence III for various ion energies was measured. Modifications and x-ray experiments were done on Picket Fence II B. Plasma studies showed reflections to occur prior to sudden decay cut-off at y from 92% to 6 20 mu sec. A large bore hydromagnetic gun was set up and showed reasonable neutron production. Experimentsmore » were also performed on coaxial gun injection into a magnetic field. Recent observations show the fraction of Lorentz force ionization in the fast neutral atom injection experiment, ALICE, to be much higher than previously supposed. The puised field coil system of the TOY TOP III S was rebuilt; neutrons were observed in subsequent operation. Efforts continued on reconciling the observed stability and the observed unstable plasma behavior of Table Top III with theory. A self-consistent solution for the distribution of electrons in an infinitely thin E-layer was derived analytically for the ASTRON now under construction. An elementary theory of the finiteconductivity problem was formulated and was found to fit experimental results. The 12-inch LEVITRON received new high-capacity vacuum pumps and a hollow-cathodedischarge plasma source. Homopolar V magnetic field coils, vacuum system, and valves were improved. Unsuccessful attempts to observe neutrons from d-d reactions were made. Limited operation of the Hothouse III ion cyclotron heating apparatus showed about 50% efficiency for power transfer from the oscillator to hydromagnetic wave motion. Characteristics of plasma established in the DCX-1 in carbon arc operation were examined. Currents, r-f activity intensity. plasma potential, and signals to neutral particle detectors were all analyzed. Operation of the almost complete DCX-2 revealed ion densities of about 10/sup 7/ to 10/sup 8//cm/sup 3/ with hot-ion densities in the central field region of only 2 x 10/sup 6//cm/sup 3/ . Electron cyclotron heating experiments showed a large flux of kv neutrons from the plasma apparentiy due to couiomb- or electro-dissociation of deuterium by high energy electrons. Studies revealed molten LiF--BeF/sub 2/ to be a promising material for thermonuclear reactor tritium blankets. Interaction between the electron beam and plasma in the electron-beam plasma injection experiment resulted in plasma electron heating. An electron temperature of 32 kev and a density of about 4 x 10/sup 11/ electrons/cm/sup 3/ were indicated. The C stellarator was operated using shaped puises for ohmic heating. Microwave and relative line intensity monitoring were used in determining electron temperature and ion concentrations. Radiation and power loss balance, effect of helical windings on plasma behavior, plasma drift at Ubends, and effects of a transverse magnetic field were also studied. Neutral atoms produced during initial dissociation apparently remain for 5 to 8 msec. Wall impurities in the B-1 stellarator decreased when an aperture limiter was inserted. Magnetic pump equipment was added to the B-3 stellarator. Langmuir probe studies of currentvoltage characteristics showed well-defined saturation current densities of ions and electrons in the ratio 1:30. Plasma losses were also studied. Ion energy distribution« less

Publication Date:
Research Org.:
Defense Atomic Support Agency. Field Command, Albuquerque, N. Mex.
OSTI Identifier:
4705678
Report Number(s):
NP-12651
NSA Number:
NSA-17-019456
Resource Type:
Technical Report
Resource Relation:
Other Information: Orig. Receipt Date: 31-DEC-63
Country of Publication:
Country unknown/Code not available
Language:
English
Subject:
PHYSICS; BERYLLIUM FLUORIDES; BLANKETS; CESIUM; CHALICE DEVICES; COILS; CONFIGURATION; CONFINEMENT; CUSPED GEOMETRIES; CYCLOTRONS; DECAY; DENSITY; DEUTERONS; ELECTRIC CHARGES; ELECTRIC FIELDS; ELECTRODES; ELECTRON BEAMS; ELECTRON TEMPERATURE; ENERGY; EUROPE; EXCITATION; FRANCE; GERMANY; GRIDS; INTERACTIONS; LANGMUIR PROBE; LASERS; LITHIUM FLUORIDES; LORENTZ FORCE; LOSSES; MAGNETIC FIELDS; MAGNETIC MIRRORS; MEASURED VALUES; MICROWAVES; NEUTRONS; NUCLEAR REACTIONS; OSCILLATIONS; OSCILLATORS; PEAKS; PINCH; PLASMA; PLASMA DIAGNOSTICS; POTASSIUM; PRESSURE; PRODUCTION; REACTORS; SCYLLA; SPECTRA; STABILITY; STELLARATOR MODEL B-1; STELLARATOR MODEL B-3; STELL

Citation Formats

. SUMMARY OF SHERWOOD ACTIVITIES SUPPLEMENTARY REPORT. Country unknown/Code not available: N. p., 1963. Web.
. SUMMARY OF SHERWOOD ACTIVITIES SUPPLEMENTARY REPORT. Country unknown/Code not available.
. Fri . "SUMMARY OF SHERWOOD ACTIVITIES SUPPLEMENTARY REPORT". Country unknown/Code not available.
@article{osti_4705678,
title = {SUMMARY OF SHERWOOD ACTIVITIES SUPPLEMENTARY REPORT},
author = {},
abstractNote = {; 8 7 8 : 5 8 8 7 = ; 7 8 : sure modes. The low pressure, high-energy mode was characterized by formation of two groups of deuterons --one about 10/sup 11/ total, the other about 10/sup 16/ ions/burst. E x B forces apparently accelerate the particles. The Scylla II preionizer produced a clean plasma with deuteron ion energies up to 800 ev. Scylla IV completion is reported; the preionizer and B/sub o/ banks are in operation. Zeeman effect measurements revealed a 0 to 10 kgauss field in the fireball before peak compression. External probe measurements on Scylla I showed the external magnetic field to rise to 55 kgauss in 1.25 mu sec with production of a hot deuterium plasma of 5 x 10/sup 16/ cm/sup 3/ density. X-ray measurements of temperature were also made. The flux of ions leaving the B field of Picket Fence III for various ion energies was measured. Modifications and x-ray experiments were done on Picket Fence II B. Plasma studies showed reflections to occur prior to sudden decay cut-off at y from 92% to 6 20 mu sec. A large bore hydromagnetic gun was set up and showed reasonable neutron production. Experiments were also performed on coaxial gun injection into a magnetic field. Recent observations show the fraction of Lorentz force ionization in the fast neutral atom injection experiment, ALICE, to be much higher than previously supposed. The puised field coil system of the TOY TOP III S was rebuilt; neutrons were observed in subsequent operation. Efforts continued on reconciling the observed stability and the observed unstable plasma behavior of Table Top III with theory. A self-consistent solution for the distribution of electrons in an infinitely thin E-layer was derived analytically for the ASTRON now under construction. An elementary theory of the finiteconductivity problem was formulated and was found to fit experimental results. The 12-inch LEVITRON received new high-capacity vacuum pumps and a hollow-cathodedischarge plasma source. Homopolar V magnetic field coils, vacuum system, and valves were improved. Unsuccessful attempts to observe neutrons from d-d reactions were made. Limited operation of the Hothouse III ion cyclotron heating apparatus showed about 50% efficiency for power transfer from the oscillator to hydromagnetic wave motion. Characteristics of plasma established in the DCX-1 in carbon arc operation were examined. Currents, r-f activity intensity. plasma potential, and signals to neutral particle detectors were all analyzed. Operation of the almost complete DCX-2 revealed ion densities of about 10/sup 7/ to 10/sup 8//cm/sup 3/ with hot-ion densities in the central field region of only 2 x 10/sup 6//cm/sup 3/ . Electron cyclotron heating experiments showed a large flux of kv neutrons from the plasma apparentiy due to couiomb- or electro-dissociation of deuterium by high energy electrons. Studies revealed molten LiF--BeF/sub 2/ to be a promising material for thermonuclear reactor tritium blankets. Interaction between the electron beam and plasma in the electron-beam plasma injection experiment resulted in plasma electron heating. An electron temperature of 32 kev and a density of about 4 x 10/sup 11/ electrons/cm/sup 3/ were indicated. The C stellarator was operated using shaped puises for ohmic heating. Microwave and relative line intensity monitoring were used in determining electron temperature and ion concentrations. Radiation and power loss balance, effect of helical windings on plasma behavior, plasma drift at Ubends, and effects of a transverse magnetic field were also studied. Neutral atoms produced during initial dissociation apparently remain for 5 to 8 msec. Wall impurities in the B-1 stellarator decreased when an aperture limiter was inserted. Magnetic pump equipment was added to the B-3 stellarator. Langmuir probe studies of currentvoltage characteristics showed well-defined saturation current densities of ions and electrons in the ratio 1:30. Plasma losses were also studied. Ion energy distribution},
doi = {},
journal = {},
number = ,
volume = ,
place = {Country unknown/Code not available},
year = {1963},
month = {2}
}

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