Ion-Density Profile of the Flow in an Electric Shock Tube

1965 ◽  
Vol 4 (3) ◽  
pp. 218-224
Author(s):  
Ri'ichi Matsuzaki
Keyword(s):  
Shock Tube ◽  
Density Profile ◽  
Electric Shock ◽  
Ion Density

Precursor Arc in an Electric Shock Tube

1964 ◽  
Vol 7 (7) ◽  
pp. 1075 ◽  
Author(s):  
J. P. Barach ◽  
J. A. Sivinski
Keyword(s):  
Shock Tube ◽  
Electric Shock

Low Attenuation Shock Tube: Driving Mechanism and Diaphragm Characteristics

1971 ◽  
Vol 49 (15) ◽  
pp. 1982-1993 ◽  
Author(s):  
F. L. Curzon ◽  
M. G. R. Phillips
Keyword(s):  
Shock Wave ◽  
Simple Model ◽  
Shock Tube ◽  
Electric Shock ◽  
Strong Evidence ◽  
Room Temperature ◽  
Wave Motion ◽  
Driving Mechanism ◽  
Driver Gas ◽  
Opening Process

The properties of an electric shock tube fitted with a diaphragm are examined. The diaphragm opening process and its effect on the motion of the shock wave are studied. A simple model to account for the diaphragm opening time is given and critical comparisons of theory and results with other work are made.The model works well both for shock tubes employing room temperature driver gas and also for those using heated driver gas. Furthermore, there is strong evidence that the diaphragm opening process is responsible for the accelerating phase of the shock wave motion in both types of shock tube.

scholarly journals Effect of self focusing on the prolongation of laser produced plasma channel

2009 ◽  
Vol 27 (1) ◽  
pp. 33-39 ◽  
Author(s):  
U. Verma ◽  
A.K. Sharma
Keyword(s):  
Theoretical Model ◽  
Time Delay ◽  
Laser Pulse ◽  
Density Profile ◽  
Plasma Channel ◽  
Ion Density ◽  
Pulse Technique ◽  
Recombination Time ◽  
Self Focusing ◽  
Gaseous Plasma

AbstractA theoretical model for the prolongation of lifetime of a gaseous plasma channel formed by two pulse technique at laser intensities below the tunnel ionization threshold is developed. The first laser pulse ionizes the gas completely on the axis and partially off the axis, causing self-defocusing of the pulse. After the passage of the pulse, the plasma expands radially, creating an atom/ion density profile with a minimum on the axis. Partial recombination also sets in. As the second pulse arrives, after a time delay of less than the recombination time (~ns), the electrons get heated, and the recombination rate is slowed down. The second pulse self focuses, enhancing the heating rate and lengthening the lifetime of the plasma channel.

Calibrating ion density profile measurements in ion thruster beam plasma

2016 ◽  
Vol 87 (11) ◽  
pp. 113502 ◽  
Author(s):  
Zun Zhang ◽  
Haibin Tang ◽  
Junxue Ren ◽  
Zhe Zhang ◽  
Joseph Wang
Keyword(s):  
Density Profile ◽  
Ion Density ◽  
Ion Thruster ◽  
Beam Plasma

Electric Shock-Tube Experiment

1966 ◽  
Vol 34 (2) ◽  
pp. 127-129
Author(s):  
James D. Hood
Keyword(s):  
Shock Tube ◽  
Electric Shock ◽  
Shock Tube Experiment

scholarly journals Evaluation of focusing characteristics of spherical plasma focus diode

1998 ◽  
Vol 16 (1) ◽  
pp. 177-183
Author(s):  
Kazuo Imanari ◽  
Takeru Bingo ◽  
Kozue Sasaki ◽  
Weihua Jiang ◽  
Katsumi Masugata ◽  
...  
Keyword(s):  
Thermal Energy ◽  
Density Profile ◽  
Plasma Focus ◽  
Ion Beam ◽  
Large Fraction ◽  
Initial Energy ◽  
Pinhole Camera ◽  
Ion Density ◽  
Rutherford Scattering ◽  
Spherical Plasma

Experiments and the associated simulations for the evaluation of the focusibility of spherical Plasma focus diode (SPFD) were carried out. To evaluate the ion beam focusibility, two types of time-integrated Rutherford scattering pinhole camera were used: angle-integrated and angle-resolved type. From the former method, the ion beam has been found to focus in a cylindrical area with 4.5mmφ × 6.0 mm. The ion density profile shows a peak at 2.5 mm downstream from the geometric focusing point. From the latter method, it is found that a large fraction of the ion beam is produced from the downstream region of the diode. In simulations, the influence of an initial ion thermal energy was evaluated on the ion beam focusibility. When the initial energy is 20 eV, the ion beam focused in a cylindrical area of 0.4 mmφ × 2.4 mm. The experimental focusing parameters seem to be much worse than those evaluated numerically presumably due to the aiming error of ion beam.

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