Large-acceptance-angle gridded analyzers in an axial magnetic field

doi:10.2172/6378514

Abstract

Electrostatic retarding-potential gridded analyzers have been used to measure the current and the axial energy distributions of ions escaping along magnetic field lines in the 2XIIB magnetic mirror fusion experiment at Lawerence Livermore National Laboratory (LLNL). Three analyzers are discussed: a large scanning analyzer with a movable entrance aperture that can measure ion or electron losses from a different segment of the plasma diameter on each shot, a smaller analyzer that mounts in 5-cm-diam ports, and a multicollector analyzer that can continuously measure losses from the entire plasma diameter.

EXPERIMENTAL PINCH STABILIZATION WITH LARGE AXIAL MAGNETIC FIELD

Brower, D.F. ; Dunaway, R.E. ; Malmberg, J.H. ; ... October 1958

A solution of the stabilization problem in discharges in gases is one of the primary purposes of experimental work in controlled thermonuclear reactions at this time. The employment of an axial magnetic, field contained within the pinching plasma is a means of providing tension in the pinch discharge to counteract the negative tension of the orthogonal magnetic field produced by the pinching current itself. Experimental equipment was made to produce very high axial magnetic fields of 40,000 gauss so that correspondingly large pinch currents can be employed. An important matter to consider and to test experimentally is the influence ofmore »« less
LE MOUVEMENT D'UND PARTICULE DANS UN CHAMP DE CHARGE D'ESPACE RADIAL ET UN CHAMP MAGNETIQUE AXIAL. (Motion of a Particle in a Radial Space-Charge Field and in an Axial Magnetic Field). (in French)

Canobbio, E. ; Finzi, U. January 1966
Large acceptance angle retarding-potential analyzers

Molvik, A.W. May 1981 - Rev. Sci. Instrum.; (United States)

Electrostatic retarding-potential gridded analyzers have been used to measure the current and the axial energy distributions of ions escaping along magnetic field lines in the 2XIIB magnetic fusion experiment at Lawrence Livermore National Laboratory (LLNL). Two analyzers are discussed: a large scanning analyzer with a movable entrance aperture that can measure ion losses from a different segment of the plasma diameter on each shot, and a smaller analyzer that mounts in 5-cm-diam. ports. Careful electromagnetic shielding and grounding were necessary in order to reduce spurious signals. Accurate measurements of ion current require grids that attenuate the plasma flow and isolatemore »« less
DOI: 10.1063/1.1136655
Study and Construction of a /CAP BETA/ Spectrometer of Uniform Axial Magnetic Field Fitted with a /CAP BETA/-$gamma$ Coincidence Selector. Study of the /CAP BETA/ Spectra of $sup 32$P, $sup 203$Hg, *SUP $sup 198$Au. (Theses); ETUDE ET REALISATION D'UN SPECTROMETRE /cap beta/ A CHAMP MAGNETIQUE AXIAL UNIFORME, MUNI D'UN SELECTEUR DE COINCIDENCE /cap beta/-$gamma$. ETUDE DES SPECTRES /cap beta/DU$sup 32$P,$sup 203$Hg $sup 198$Au. MESURE DES COEFFICIENTS DE CONVERSION DU $sup 203$Tl ET DU $sup 198$Hg (Theses)

Parsignault, D. January 1965
Study of helium:argon:ethane gas mixtures used in drift chambers for large-acceptance spectrometers in high magnetic fields. Final report

Hewitt, J.D. December 1990

For today's large-acceptance spectrometers, precise knowledge of electrons in gases and magnetic fields is required for particle track reconstruction. Measurements under a variety of conditions must be performed in order to accurately model these processes with software simulations such as GARFIELD. At Brookhaven National Laboratory, a prototype drift chamber, constructed at the Continuous Electron Beam Accelerator Facility (CEBAF), incorporating a hex-cell wire pattern, was filled with helium:argon:ethane and tested in a high magnetic field and without the magnetic field. The results of these tests are compared and indicate little change in the drift velocity of this gas mixture in andmore » out of a high magnetic field.« less

Title: Large-acceptance-angle gridded analyzers in an axial magnetic field

Abstract

Citation Formats

EXPERIMENTAL PINCH STABILIZATION WITH LARGE AXIAL MAGNETIC FIELD

LE MOUVEMENT D'UND PARTICULE DANS UN CHAMP DE CHARGE D'ESPACE RADIAL ET UN CHAMP MAGNETIQUE AXIAL. (Motion of a Particle in a Radial Space-Charge Field and in an Axial Magnetic Field). (in French)

Large acceptance angle retarding-potential analyzers

Study of helium:argon:ethane gas mixtures used in drift chambers for large-acceptance spectrometers in high magnetic fields. Final report