scholarly journals FLOC: Field Line and Orbit Code for the study of ripple beam injection into tokamaks

1978 ◽  
Author(s):  
R. H. Fowler ◽  
D. K. Lee ◽  
P. W. Gaffney ◽  
J. A. Rome
Keyword(s):  
Field Line ◽  
Beam Injection ◽  
Orbit Code

Evolution of Large-Scale Coronal Structures

1994 ◽  
Vol 144 ◽  
pp. 29-33
Author(s):  
P. Ambrož
Keyword(s):  
Magnetic Field ◽  
Field Line ◽  
Large Scale ◽  
Coronal Magnetic Field ◽  
Source Surface ◽  
Solar Cycles ◽  
Characteristic Relationship ◽  
The Magnetic Field ◽  
Coronal Structures

AbstractThe large-scale coronal structures observed during the sporadically visible solar eclipses were compared with the numerically extrapolated field-line structures of coronal magnetic field. A characteristic relationship between the observed structures of coronal plasma and the magnetic field line configurations was determined. The long-term evolution of large scale coronal structures inferred from photospheric magnetic observations in the course of 11- and 22-year solar cycles is described.Some known parameters, such as the source surface radius, or coronal rotation rate are discussed and actually interpreted. A relation between the large-scale photospheric magnetic field evolution and the coronal structure rearrangement is demonstrated.

Observation of Edge Filamentary Structure Motion during Supersonic Molecular-Beam Injection Using a Fast Camera in Heliotron J

2013 ◽  
Vol 8 (0) ◽  
pp. 1402066-1402066 ◽  
Author(s):  
Linge ZANG ◽  
Nobuhiro NISHINO ◽  
Tohru MIZUUCHI ◽  
Shinsuke OHSHIMA ◽  
Masaki TAKEUCHI ◽  
...  
Keyword(s):  
Molecular Beam ◽  
Filamentary Structure ◽  
Supersonic Molecular Beam ◽  
Beam Injection

The TFTR 40 MW neutral beam injection system and DT operations

2002 ◽  
Author(s):  
T. Stevenson ◽  
T. O'Connor ◽  
V. Garzotto ◽  
L. Grisham ◽  
J. Kamperschroer ◽  
...  
Keyword(s):  
Neutral Beam Injection ◽  
Neutral Beam ◽  
Injection System ◽  
Beam Injection

Thermo-mechanical design of the neutralizer for CRAFT negative ion-based neutral beam injection system

2021 ◽  
Vol 169 ◽  
pp. 112482
Author(s):  
Jianglong Wei ◽  
Zhaoyuan Zhang ◽  
Wei Yi ◽  
Ling Tao ◽  
Lizhen Liang ◽  
...  
Keyword(s):  
Mechanical Design ◽  
Neutral Beam Injection ◽  
Negative Ion ◽  
Neutral Beam ◽  
Injection System ◽  
Beam Injection

scholarly journals Interplanetary magnetic field control of Saturn's polar cusp aurora

2005 ◽  
Vol 23 (4) ◽  
pp. 1405-1431 ◽  
Author(s):  
E. J. Bunce ◽  
S. W. H. Cowley ◽  
S. E. Milan
Keyword(s):  
Magnetic Field ◽  
Solar Wind ◽  
Interplanetary Magnetic Field ◽  
Field Line ◽  
High Latitude ◽  
Closed Field ◽  
Vortical Flows ◽  
Dayside Magnetopause ◽  
Closed Field Line ◽  
Lobe Reconnection

Abstract. Dayside UV emissions in Saturn's polar ionosphere have been suggested to be the first observational evidence of the kronian "cusp" (Gérard et al., 2004). The emission has two distinct states. The first is a bright arc-like feature located in the pre-noon sector, and the second is a more diffuse "spot" of aurora which lies poleward of the general location of the main auroral oval, which may be related to different upstream interplanetary magnetic field (IMF) orientations. Here we take up the suggestion that these emissions correspond to the cusp. However, direct precipitation of electrons in the cusp regions is not capable of producing significant UV aurora. We have therefore investigated the possibility that the observed UV emissions are associated with reconnection occurring at the dayside magnetopause, possibly pulsed, akin to flux transfer events seen at the Earth. We devise a conceptual model of pulsed reconnection at the low-latitude dayside magnetopause for the case of northwards IMF which will give rise to pulsed twin-vortical flows in the magnetosphere and ionosphere in the vicinity of the open-closed field-line boundary, and hence to bi-polar field-aligned currents centred in the vortical flows. During intervals of high-latitude lobe reconnection for southward IMF, we also expect to have pulsed twin-vortical flows and corresponding bi-polar field-aligned currents. The vortical flows in this case, however, are displaced poleward of the open-closed field line boundary, and are reversed in sense, such that the field-aligned currents are also reversed. For both cases of northward and southward IMF we have also for the first time included the effects associated with the IMF By effect. We also include the modulation introduced by the structured nature of the solar wind and IMF at Saturn's orbit by developing "slow" and "fast" flow models corresponding to intermediate and high strength IMF respectively. We then consider the conditions under which the plasma populations appropriate to either sub-solar reconnection or high-latitude lobe reconnection can carry the currents indicated. We have estimated the field-aligned voltages required, the resulting precipitating particle energy fluxes, and the consequent auroral output. Overall our model of pulsed reconnection under conditions of northwards and southwards IMF, and for varying orientations of IMF By, is found to produce a range of UV emission intensities and geometries which is in good agreement with the data presented by Gérard et al. (2004). The recent HST-Cassini solar wind campaign provides a unique opportunity to test the theoretical ideas presented here.

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