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Transverse Injection Experiment; Injection Transversale; Poslednie dostizheniya v oblasti inzhektirovaniya plazmy poperek magnitnogo polya; Inyeccion Transversal

Conference:

Abstract

The motion of a plasma stream injected transverse to a magnetic field has been discussed by several authors. In early experiments with the injection of a fast (50 to 70 cm/{mu}sec) dense (10{sup 14} ion/cm{sup 3}) plasma transverse to a magnetic field, a self polarization electric field was observed and the stream crossed the magnetic field with an E x B drift. The magnetic field was only slightly disturbed by the stream (| {Delta}B/B | <0.1) while the drift across magnetic fields up to 5 kG was at approximately the velocity of the injected stream. The height of the stream in the direction of V x B is compressed as it drifts into high magnetic field regions. At the same time, electron density measurements using interferometry techniques with the He-Ne laser show that the transverse field up to 7 kG causes no appreciable spreading of the stream to take place in the direction of B. Of interest is the action of the stream as it crosses a region where magnetic field lines reverse direction about a field null line. As the stream proceeds across the separatrix between the two field line directions, the electric field must change direction if the  More>>
Authors:
Hammel, J. E.; Baker, D. A. [1] 
  1. Los Alamos Scientific Laboratory, Los Alamos, NM (United States)
Publication Date:
Apr 15, 1966
Product Type:
Conference
Report Number:
IAEA-CN-21/85
Resource Relation:
Conference: Conference on Plasma Physics and Controlled Nuclear Fusion Research, Culham (United Kingdom), 6-10 Sep 1965; Other Information: 6 refs., 10 figs.; Related Information: In: Plasma Physics and Controlled Nuclear Fusion Research. Vol. II. Proceedings of a Conference on Plasma Physics and Controlled Physics Research Nuclear Fusion Research| 1017 p.
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; BEAM CURRENTS; DEPOLARIZATION; ELECTRIC FIELDS; ELECTRON DENSITY; HELIUM-NEON LASERS; INTERFEROMETRY; IONS; MAGNETIC FIELDS; PLASMA; PLASMA BEAM INJECTION; POLARIZATION; STREAMS
OSTI ID:
22178056
Research Organizations:
International Atomic Energy Agency, Vienna (Austria)
Country of Origin:
IAEA
Language:
English
Other Identifying Numbers:
Other: ISSN 0074-1884; TRN: XA13M2276002500
Submitting Site:
INIS
Size:
page(s) 499-508
Announcement Date:
Jan 09, 2014

Conference:

Citation Formats

Hammel, J. E., and Baker, D. A. Transverse Injection Experiment; Injection Transversale; Poslednie dostizheniya v oblasti inzhektirovaniya plazmy poperek magnitnogo polya; Inyeccion Transversal. IAEA: N. p., 1966. Web.
Hammel, J. E., & Baker, D. A. Transverse Injection Experiment; Injection Transversale; Poslednie dostizheniya v oblasti inzhektirovaniya plazmy poperek magnitnogo polya; Inyeccion Transversal. IAEA.
Hammel, J. E., and Baker, D. A. 1966. "Transverse Injection Experiment; Injection Transversale; Poslednie dostizheniya v oblasti inzhektirovaniya plazmy poperek magnitnogo polya; Inyeccion Transversal." IAEA.
@misc{etde_22178056,
title = {Transverse Injection Experiment; Injection Transversale; Poslednie dostizheniya v oblasti inzhektirovaniya plazmy poperek magnitnogo polya; Inyeccion Transversal}
author = {Hammel, J. E., and Baker, D. A.}
abstractNote = {The motion of a plasma stream injected transverse to a magnetic field has been discussed by several authors. In early experiments with the injection of a fast (50 to 70 cm/{mu}sec) dense (10{sup 14} ion/cm{sup 3}) plasma transverse to a magnetic field, a self polarization electric field was observed and the stream crossed the magnetic field with an E x B drift. The magnetic field was only slightly disturbed by the stream (| {Delta}B/B | <0.1) while the drift across magnetic fields up to 5 kG was at approximately the velocity of the injected stream. The height of the stream in the direction of V x B is compressed as it drifts into high magnetic field regions. At the same time, electron density measurements using interferometry techniques with the He-Ne laser show that the transverse field up to 7 kG causes no appreciable spreading of the stream to take place in the direction of B. Of interest is the action of the stream as it crosses a region where magnetic field lines reverse direction about a field null line. As the stream proceeds across the separatrix between the two field line directions, the electric field must change direction if the stream drift is to continue. The stream halts in the region of the separatrix while large currents are measured along magnetic field lines connecting the front of the stream with the following portions. Insulators placed to interrupt the current allow the stream to proceed into the reversed field region. By making use of the inductance associated with the depolarization current when magnetic field lines are tied at some distance to the side of the stream, a separation of fast and slow stream components can be made. The cutoff of the slow stream component is observed with the He-Ne laser interferometry techniques. Electric field measurements at several points along the stream show some of the more complicated features of the plasma flow. (author) [French] Le mouvement d'un faisceau de plasma injecte transversalement a un champ magnetique a fait l'objet de diverses etudes. Au cours des premieres experiences d'injection d'un plasma rapide (50-70 cm/{mu}s) et dense (10{sup 14} ion/cm{sup 3}) transversalement a un champ magnetique, les auteurs ont observe un champ electrique d'autopolarisation et le plasma traversait le champ magnetique avec une derive du type E x B. Le champ magnetique n'etait que faiblement perturbe par le faisceau (| {Delta}B/B | <0.1), tandis que la vitesse de la derive, a travers des champs magnetiques pouvant atteindre 5 kG, etait approximativement egale a celle du plasma injecte. Le plasma derivant dans des regions a champ magnetique eleve, son epaisseur dans la direction de V x B diminue. Simultanement, des mesures de la densite des electrons par des methodes interferometriques avec le laser He-Ne montrent que le champ transversal pouvant atteindre 7 kG ne provoque pas d'etalement notable du plasma dans la direction de B. Il est interessant d'observer le comportement du plasma lorsqu'il traverse une region oh les lignes de champ magnetique changent de sens de part et d'autre d'une ligne d'intensite nulle. Lorsque le plasma traverse la separatrice entre les deux directions, il faut que le champ electrique change de sens pour que la derive du plasma puisse se prolonger. Le plasma s'arrete au voisinage de la separatrice et on mesure des courants importants le long des lignes de champ magnetique reliant la partie frontale du plasma aux parties suivantes. Des isolateurs, placesde maniere a interrompre le courant, permettent au plasma de passer dans la region de champ inverse. En utilisant l'inductance liee au courant de depolarisation lorsque les lignes de champ magnetique sont fixees a une certaine distance de la lisiere du plasma, il a ete possible de Separer les composantes lente et rapide du plasma. Les auteurs ont observe, par des methodes interferometriques, la coupure de la composante lente du plasma, a l'aide d'un laser He-Ne. Des mesures du champ electrique en plusieurs points le long du courant de plasma permettent de determiner certaines des caracteristiques complexes du debit de plasma. (author) [Spanish] El movimiento de una corriente de plasma inyectada transversamente a un campo magnetico ha sido estudiado en varias ocasiones. En los primeros experimentos de inyeccion de un plasma rapido (50-70 cm/{mu}s) y denso (10{sup 14} iones/cm{sup 3}) transversalmente a un campo magnetico, los autores observaron un campo electrico de autopolarizacion y la corriente de plasma atravesaba el campo magnetico con una deriva del tipo E x B. El campo magnetico solo era ligeramente perturbado por la corriente de plasma (| {Delta}B/B | <0.1), mientras que la deriva a traves de campos magneticos hasta de 5 kGs tenia aproximadamente la velocidad de la comente inyectada. La altura de esta corriente de plasma, en la direccion de V x B se comprime a medida que va derivando a regiones de campo magnetico mas intenso. Al mismo tiempo, las mediciones de la densidad electronica, mediante procedimientos de interferometrfa con laser de He-Ne, indican que el campo transversal, que puede alcanzar a 7 kGs, no provoca una extension apreciable de la corriente de plasma en la direccion de B. Resulta interesante observar el comportamiento de la corriente al atravesar una region en la que las lineas del campo magnetico invierten su direccion alrededor de una lfnea de intensidad nula. Cuando la corriente atraviesa la lfnea que separa las dos direcciones el campo electrico tiene que cambiar de sentido para que pueda continuar la deriva de la corriente de plasma. La corriente se detiene en la region de la lfnea de separacion y se miden corrientes de gran intensidad a lo largo de las lineas del campo magnetico que conectan el frente de la corriente con las partes siguientes. Las mediciones preliminares del campo electrico efectuadas en varios puntos a lo largo de la corriente de plasma muestran algunas de las caracteristicas mas complejas de la circulacion de este. (author) [Russian] Dvizhenie plazmy, inzhektiruemoj poperek magnitnogo polja, rassmatrivalos' rjadom avtorov. V rannih jeksperimentah s inzhektirovaniem bystroj (5 Division-Sign 7 * 10{sup 7} sm/sek) i plotnoj (10{sup 14} cm{sup -3}) plazmy poperek magnitnogo polja nabljudalos' pojavlenie poljarizacionnogo jelektricheskogo polja,i struja plazmy peresekala magnitnoe pole s E x B drejfom. Magnitnoe pole slabo vozmushhalos' plazmoj (| {Delta}B/B | <0.1), v to vremja kak skorost' drejfa poperek magnitnogo polja naprjazhennost'ju do 5 kgs byla priblizitel'no ravna skorosti inzhektirovannoj strui. Struja szhimalas' v napravlenii perpendikuljarnom V i V po mere prodvizhenija v oblast' sil'nogo magnitnogo polja. V to zhe vremja izmerenija plotnosti jelektronov interferometricheskim metodom s pomoshh'ju He-Ne lazera pokazyvajut, chto poperechnoe pole naprjazhennost'ju do 7 kgs ne vyzyvaet zametnogo smeshhenija strui v napravlenii polja. Predstavljaet interes povedenie strui, kogda ona peresekaet oblast', v kotoroj magnitnoe pole menjaet svoe napravlenie otnositel'no linii nulevogo polja. Pri peresechenii struej . separatrissy mezhdu dvumja magnitnymi silovymi linijami jelektricheskoe pole dolzhno menjat' napravlenie, esli drejf prodolzhaetsja. Struja ostaetsja v oblasti separatrissy, togda kak vdol' silovyh linij magnitnogo polja izmerjajutsja bol'shie toki, svjazyvajushhie perednjuju chast' strui s posledujushhimi chastjami. Izoljatory, postavlennye dlja preryvanija jetogo toka, pozvoljajut strue dvigat'sja v oblast' polja obratnoj poljarnosti. Ispol'zuja induktivnost', svjazannuju s tokom depoljarizacii strui, mozhno proizvesti razdelenie bystryh i medlennyh komponentov strui. Otsechka medlennogo komponenta strui nabljudaetsja s pomoshh'ju interfe- rometricheskih metodov s primeneniem He-Ne lazera. Izmerenija jelektricheskogo polja v neskol'kih tochkah vdol' techenija pokazyvajut nekotorye iz naibolee slozhnyh osobennostej potoka plazmy. (author)}
place = {IAEA}
year = {1966}
month = {Apr}
}