scholarly journals Estimation of the neutron production of KSTAR based on empirical scaling law of the fast ion stored energy and ion density under NBI power and machine size upgrade

2022 ◽  
Author(s):  
Jong-Gu Kwak ◽  
S.C. Hong
Keyword(s):  
Scaling Law ◽  
Neutron Production ◽  
Stored Energy ◽  
Ion Density ◽  
Fast Ion

scholarly journals Analytical description of rippling effect and ion acceleration in plasma produced by a short laser pulse

2006 ◽  
Vol 24 (1) ◽  
pp. 15-25 ◽  
Author(s):  
S. GLOWACZ ◽  
H. HORA ◽  
J. BADZIAK ◽  
S. JABLONSKI ◽  
YU CANG ◽  
...  
Keyword(s):  
Electromagnetic Field ◽  
Laser Pulse ◽  
Analytical Description ◽  
Skin Layer ◽  
Short Laser Pulse ◽  
Ion Density ◽  
Frequency Components ◽  
Acceleration Method ◽  
Fast Ion ◽  
Underdense Plasma

In this paper we present the analytical description of two processes dealing with the skin-layer ponderomotive acceleration method of fast ion generation by a short laser pulse: ion density rippling in the underdense plasma region and generation of ion beams by trapped electromagnetic field in plasma. Some numerical examples of hydrodynamic simulation illustrating these processes are shown. The effect of using the laser pulse consisting of different frequency components on the ion density rippling and on phenomena connected with trapped electromagnetic field is analyzed.

scholarly journals Scaling Law of Stray Fields from SMES Coil Configurations as Functions of Stored Energy and Maximum Magnetic Field.

2002 ◽  
Vol 37 (5) ◽  
pp. 202-207 ◽  
Author(s):  
Takataro HAMAJIMA ◽  
Kimiyasu SATO ◽  
Hiroshi YAMADA ◽  
Naoyuki HARADA ◽  
Makoto TSUDA ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Scaling Law ◽  
Stored Energy ◽  
Maximum Magnetic Field

Study of Microinstabilities in Anisotropic Plasmoid of Thermonuclear Ions

2009 ◽  
Vol 4 (1) ◽  
pp. 25-29
Author(s):  
Mariya S. Korzhavina ◽  
Andrey V. Anikeev ◽  
Petr A. Bagryansky
Keyword(s):  
Magnetic Field ◽  
Nuclear Physics ◽  
Field Vector ◽  
Budker Institute ◽  
Axially Symmetric ◽  
Plasma Parameters ◽  
Ion Density ◽  
Ion Cyclotron ◽  
Additional Section ◽  
Fast Ion

The following article presents the results of investigation of microinstabilities in the anisotropic synthesized hot ion plasmoid (SHIP). Plasmoid is located in a small mirror section that is installed at one side of the GDT facility in Budker Institute of Nuclear Physics, Novosibirsk, which is an axially symmetric magnetic mirror device of gas dynamic trap type. The magnetic field on axis is in the range of 2.5 Tesla and the mirror ratio is ~ 2. The additional mirror section is filled with background plasma streaming from the central cell of GDT. To create the population of hot ions with strong anisotropy two focused neutral beams with energy of 21–23 keV are injected perpendicularly to the direction of magnetic field. Ionisation of the beams generates the high-energetic ion component with the density of about 5x1013 сm–3 and mean energy about 13 keV. The distribution function of fast ions is thus strongly anisotropic in the phase space with the ratio E⊥ / E& ~ 50. To define the type and the parameters of the developing microinstability a set of high-frequency electrostatic and magnetic probes was used. The microinstability observed in the additional section of GDT is the Alfven ion cyclotron instability (AIC), because of small azimuthal wave numbers, magnetic field vector rotating in the direction of ion gyration and oscillation frequency below the actual ion cyclotron frequency. AIC instability threshold was registered at the following plasma parameters: fast ion density n > 3 · 1013 см–3, ratio of ion pressure to magnetic field pressure β ≈ 0.02, anisotropy A ≈ 35, ai / Rp ≈ 0.23, where ai is the ion gyroradius and Rp is the plasmoid radius.

Evaluation of NBI absorption and fast ion stored energy to improve thermal energy confinement time calculation in EAST

2019 ◽  
Vol 22 (2) ◽  
pp. 025103 ◽  
Author(s):  
Xiang GU ◽  
Biao SHEN ◽  
Jinping QIAN ◽  
Siye DING ◽  
Hongfei DU ◽  
...  
Keyword(s):  
Thermal Energy ◽  
Confinement Time ◽  
Stored Energy ◽  
Energy Confinement ◽  
Energy Confinement Time ◽  
Time Calculation ◽  
Fast Ion

Scaling Law of Fringe Fields as Functions of Stored Energy and Maximum Magnetic Field for SMES Configurations

2004 ◽  
Vol 14 (2) ◽  
pp. 705-708 ◽  
Author(s):  
T. Hamajima ◽  
T. Yagai ◽  
N. Harada ◽  
M. Tsuda ◽  
H. Hayashi ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Scaling Law ◽  
Stored Energy ◽  
Maximum Magnetic Field ◽  
Fringe Fields

Plasma focus ion beam-scaling laws

2014 ◽  
Vol 32 ◽  
pp. 1460317 ◽  
Author(s):  
S. H. Saw
Keyword(s):  
Plasma Focus ◽  
Power Flow ◽  
Scaling Laws ◽  
Ion Beam ◽  
Scaling Law ◽  
Ion Beams ◽  
Stored Energy ◽  
Energy Fluence ◽  
Focus Ion Beam ◽  
Storage Energy

Measurements on plasma focus ion beams include various advanced techniques producing a variety of data which has yet to produce benchmark numbers. Recent numerical experiments using an extended version of the Lee Code has produced reference numbers and scaling trends for number and energy fluence of deuteron beams as functions of stored energy E0. At the pinch exit the ion number fluence (ions m-2) and energy fluence (J m-2) computed as 2.4-7.8×1020 and 2.2-33×106 respectively were found to be independent of E0 from 0.4 – 486 kJ. This work was extended to the ion beams for various gases. The results show that, for a given plasma focus, the fluence, flux, ion number and ion current decrease from the lightest to the heaviest gas except for trend-breaking higher values for Ar fluence and flux. The energy fluence, energy flux, power flow and damage factors are relatively constant from H 2 to N 2 but increase for Ne , Ar , Kr and Xe due to radiative cooling and collapse effects. This paper reviews this work and in a concluding section attempts to put the accumulating large amounts of data into the form of a scaling law of beam energy Ebeam versus storage energy E0 taking the form for deuteron as: [Formula: see text]; where Ebeam is in J and E0 is in kJ. It is hoped that the establishment of such scaling laws places on a firm footing the reference quantitative ideas for plasma focus ion beams.

FAST ION DOUBLE COLLISION SPECTROSCOPY

1979 ◽  
Vol 40 (C1) ◽  
pp. C1-324-C1-326
Author(s):  
D. A. Church ◽  
C. S. Lee
Keyword(s):  
Double Collision ◽  
Fast Ion

FAST ION CONDUCTORS.Quasielastic neutron scattering from a single crystal of α-AgI

1980 ◽  
Vol 41 (C6) ◽  
pp. C6-17-C6-19 ◽  
Author(s):  
K. Funke ◽  
A. Höch ◽  
R. E. Lechner
Keyword(s):  
Neutron Scattering ◽  
Single Crystal ◽  
Fast Ion
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