Pinhole camera imaging of x rays and energetic neutral atoms for hot plasma diagnostics

1998 ◽  
Vol 69 (6) ◽  
pp. 2574-2575 ◽  
Author(s):  
Y. Kiwamoto ◽  
Y. Kikuchi ◽  
T. Takahashi ◽  
T. Saito ◽  
M. Ichimura ◽  
...  
Keyword(s):  
Plasma Diagnostics ◽  
Pinhole Camera ◽  
X Rays ◽  
Neutral Atoms ◽  
Camera Imaging ◽  
Energetic Neutral Atoms ◽  
Hot Plasma

The DITE tokamak experiment

1981 ◽  
Vol 300 (1456) ◽  
pp. 535-545 ◽  
Keyword(s):  
Boundary Layer ◽  
Plasma Heating ◽  
Neutral Beam ◽  
Spent Fuel ◽  
Neutral Atoms ◽  
Fusion Reactions ◽  
Energetic Neutral Atoms ◽  
Hot Plasma

The expectation of power from fusion reactions currently involves magnetic containment of hot plasma in the tokamak toroidal configuration, and plasma heating by injection of energetic neutral atoms. Isolation of the plasma from the walls, to maintain the required purity, and exhaust of the spent fuel both involve the use of a divertor. This removes plasma from the boundary layer into a separate chamber. We report tests of these concepts in the Divertor Injection Tokamak Experiment (DITE) at Culham Laboratory. We also present the first measurements in a tokamak of the neutral-beam driven current. This demonstrates the principle of a continuously operating tokamak, with possible advantages for a reactor.

What Does Our Heliosphere Look Like in Energetic Neutral Atoms? Some Recommendations for a Low-Energy ENA Camera Onboard the Interstellar Probe

2019 ◽  
Author(s):  
André Galli ◽  
Peter Wurz ◽  
Jens Kleimann ◽  
Horst Fichtner ◽  
Yoshifumi Futaana ◽  
...  
Keyword(s):  
Low Energy ◽  
Neutral Atoms ◽  
Energetic Neutral Atoms ◽  
Interstellar Probe

Imaging Saturns dust rings using energetic neutral atoms

1998 ◽  
Vol 46 (9-10) ◽  
pp. 1349-1362 ◽  
Author(s):  
B.H. Mauk ◽  
S.M. Krimigis ◽  
D.G. Mitchell ◽  
E.C. Roelof ◽  
E.P. Keath ◽  
...  
Keyword(s):  
Neutral Atoms ◽  
Energetic Neutral Atoms

Modeling energetic neutral atoms and the IBEX spectrum

2012 ◽  
Author(s):  
Jacob Heerikhuisen ◽  
Nikolai Pogorelov ◽  
Gary Zank
Keyword(s):  
Neutral Atoms ◽  
Energetic Neutral Atoms

scholarly journals Structure of the heliosheath from HSTOF energetic neutral atoms measurements

2018 ◽  
Vol 618 ◽  
pp. A26 ◽  
Author(s):  
A. Czechowski ◽  
M. Hilchenbach ◽  
K. C. Hsieh ◽  
M. Bzowski ◽  
S. Grzedzielski ◽  
...  
Keyword(s):  
Energy Range ◽  
Ecliptic Plane ◽  
High Energy ◽  
Neutral Atoms ◽  
Ion Distribution ◽  
Ion Density ◽  
Heliospheric Observatory ◽  
Energetic Neutral Atoms ◽  
Time Periods ◽  
Ecliptic Longitude

Context. From the year 1996 until now, High energy Suprathermal Time Of Flight sensor (HSTOF) on board Solar and Heliospheric Observatory (SOHO) has been measuring the heliospheric energetic neutral atoms (ENA) flux between ±17° from the ecliptic plane. At present it is the only ENA instrument with the energy range within that of Voyager LECP energetic ion measurements. The energetic ion density and thickness of the inner heliosheath along the Voyager 1 trajectory are now known, and the ENA flux in the HSTOF energy range coming from the Voyager 1 direction may be estimated. Aims. We use HSTOF ENA data and Voyager 1 energetic ion spectrum to compare the regions of the heliosheath observed by HSTOF and Voyager 1. Methods. We compared the HSTOF ENA flux data from the forward and flank sectors of the heliosphere observed in various time periods between the years 1996 and 2010 and calculated the predicted ENA flux from the Voyager 1 direction using the Voyager 1 LECP energetic ion spectrum and including the contributions of charge exchange with both neutral H and He atoms. Results. The ratio between the HSTOF ENA flux from the ecliptic longitude sector 210−300° (the LISM apex sector) for the period 1996−1997 to the estimated ENA flux from the Voyager 1 direction is ∼1.3, but decreases to ∼0.6 for the period 1996−2005 and ∼0.3 for 1998−2006. For the flank longitude sectors (120−210° and 300−30°), the ratio also tends to decrease with time from ∼0.6 for 1996−2005 to ∼0.2 for 2008−2010. We discuss implications of these results for the energetic ion distribution in the heliosheath and the structure of the heliosphere.

Energetic Neutral Atoms from the Heliotail Direction and their Potential Source Regions

2010 ◽  
Author(s):  
M. Hilchenbach ◽  
R. Kallenbach ◽  
K. C. Hsieh ◽  
A. Czechowski ◽  
Jakobus le Roux ◽  
...  
Keyword(s):  
Neutral Atoms ◽  
Source Regions ◽  
Potential Source ◽  
Energetic Neutral Atoms
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