FIELD STRENGTH IN PULSED MERCURY ARCS

1965 ◽  
Vol 43 (4) ◽  
pp. 670-675 ◽  
Author(s):  
B. Ahlborn ◽  
A. J. Barnard ◽  
H. D. Campbell
Keyword(s):  
Field Strength ◽  
Mercury Vapor ◽  
Average Field ◽  
Arc Plasma ◽  
Cathode Fall ◽  
Arc Current ◽  
Mercury Electrodes ◽  
The Relationship ◽  
Pulsed Arc ◽  
Arc Current And Voltage

In a pulsed arc with mercury electrodes the average column field strength Eco was measured for different currents I, and the relationship [Formula: see text] was found. The variations of arc current and voltage with time indicate that the anode and cathode fall regions have a combined thickness of 3 × 10−6 cm, and an average field strength of 2 × 106 V/cm. The arc plasma is formed mainly from mercury vapor, rather than from the surrounding gas.

scholarly journals High-Coercivity Fe-Co Nanoparticles Prepared by Pulsed Arc Plasma Deposition

2016 ◽  
Vol 57 (2) ◽  
pp. 207-211 ◽  
Author(s):  
Daiki Horiyama ◽  
Masashi Matsuura ◽  
Tetsuro Yamamoto ◽  
Nobuki Tezuka ◽  
Satoshi Sugimoto
Keyword(s):  
Plasma Deposition ◽  
High Coercivity ◽  
Arc Plasma ◽  
Co Nanoparticles ◽  
Pulsed Arc

Thermal Evolution of the Structure and Activity of Rh Overlayer Catalysts Prepared by Pulsed Arc-Plasma Deposition

2017 ◽  
Vol 60 (12-14) ◽  
pp. 955-961 ◽  
Author(s):  
Satoshi Misumi ◽  
Hiroshi Yoshida ◽  
Akinori Matsumoto ◽  
Satoshi Hinokuma ◽  
Tetsuya Sato ◽  
...  
Keyword(s):  
Thermal Evolution ◽  
Plasma Deposition ◽  
Arc Plasma ◽  
Pulsed Arc ◽  
Structure And Activity

Widths and shifts of argon-II lines in a pulsed arc

1968 ◽  
Vol 46 (9) ◽  
pp. 1083-1086 ◽  
Author(s):  
A. J. Barnard ◽  
H. G. James ◽  
C. R. Neufeld
Keyword(s):  
Exposure Time ◽  
High Density ◽  
The Other ◽  
Arc Plasma ◽  
And Shifts ◽  
Pulsed Arc

The spectrum of a high-density arc plasma was photographed with a 15 μs exposure time. The widths and shifts of 17 Ar-II lines were measured. While most lines have small blue shifts, the 4104 and 4278 Å lines have substantial red shifts. These two lines are also twice as wide as the other lines.

The Effect of Magnetic Field Strength on the Oscillatory Characteristics of Multimode Magnetoconvection

1993 ◽  
Vol 10 (4) ◽  
pp. 275-277
Author(s):  
J.O. Murphy ◽  
J.M. Lopez ◽  
C.P. Dyt
Keyword(s):  
Magnetic Field ◽  
Field Strength ◽  
Magnetic Field Strength ◽  
The Relationship ◽  
The Magnetic Field ◽  
Period Of Oscillation

AbstractThe effect of varying magnetic field strength on the frequency of oscillatory motions for cellular multimode magnetoconvection has been investigated. In addition the influence of the thermal, viscous and magnetic diffusivities have been taken into account and the range of preferred horizontal scales established. The relationship between the period of oscillation and the magnetic field strength is determined.

Defining the Relationship of Magnetohydrodynamic Voltages and Magnetic Field Strength

2017 ◽  
Author(s):  
Kevin J. Wu ◽  
T. Stan Gregory ◽  
Michael C. Lastinger ◽  
Brian Boland ◽  
Zion Tsz Ho Tse
Keyword(s):  
Magnetic Field ◽  
Blood Flow ◽  
Field Strength ◽  
Aortic Arch ◽  
Magnetic Field Strength ◽  
Quantitative Relationship ◽  
Solution Concentration ◽  
Exercise Stress ◽  
Induced Voltage ◽  
The Relationship

The magnetohydrodynamic (MHD) effect is observed in flowing electrolytic fluids and their interactions with magnetic fields. The magnetic field (B0), when perpendicular with the electrolytic fluid flow (μ), causes the shift of the charged particles in the fluid to shift across the length of the vessel (L) normal to the plane of B0 and flow, creating a voltage (VMHD) observable through voltage potential measurements across the flow (Eqn. 1)[1].(1)VMHD=∫0Lu⇀×B0⇀·dL⇀In the medical field, this phenomenon is commonly encountered inside of a human body inside of an MRI machine (Fig. 1). The effect appears most prominently inside the aortic arch due to orientation and size, and is a large contributing factor to noise observed in intra-MRI ECGs [2, 3]. Traditionally, this MHD induced voltage (VMHD) was filtered out to obtain clean intra-MRI ECGs, but recent studies have shown that the VMHD induced in a vessel is related to the blood flow through it (stroke volume in the case of the aortic arch) [4]. Further proof of this relationship can be shown from the increase in VMHD measured from periphery blood vessels during periods of elevated heart rate from exercise stress, when compared to baseline state [5]. Previously, a portable device was built to utilize induced VMHD as an indicator of flow [6]. The device was capable of showing change in blood flow, utilizing a blood flow metric obtained from VMHD, however a quantitative relationship between VMHD and blood flow has yet to be established. This study aims to define the relationship between induced VMHD and magnetic field strength in a controlled setting. Through modulating the distance between a pair of magnets around a flow channel, we hope to better realize the relationship between magnetic field strength and induced VMHD with constant flow and electrolytic solution concentration.

scholarly journals Field Strength Vs. Temperature Relation and the Structure of Sunspots

1993 ◽  
Vol 141 ◽  
pp. 48-51
Author(s):  
S.K. Solanki ◽  
U. Walther ◽  
W. Livingston
Keyword(s):  
Field Strength ◽  
Radial Distance ◽  
Magnetic Vector ◽  
Temperature Relation ◽  
Magnetic Gradients ◽  
The Relationship

AbstractThe relationship between the magnetic vector and the temperature of a large symmetric sunspot is studied on the basis of 1.56 µm spectra. From this relation we estimate the shape of the τ = 1 surface. i.e. the Wilson depression, as a function of radial distance in the sunspot. We find that the Wilson depression is relatively small throughout the penumbra and changes by 200–500 km at the umbral boundary. We also estimate the magnitude of magnetic gradients and curvature forces.

scholarly journals Polymeric Ablation Induced by Free Burning Arcs in Air

2017 ◽  
Vol 4 (2) ◽  
pp. 149-152
Author(s):  
M. Bator ◽  
R. Bianchetti ◽  
P. Suetterlin
Keyword(s):  
Mass Loss ◽  
Low Voltage ◽  
Simplified Model ◽  
Contact Material ◽  
Arc Plasma ◽  
Ablation Process ◽  
Experimental Conditions ◽  
Plasma Properties ◽  
Model Geometry ◽  
Arc Current

We investigate the influence of switching arcs on different polymers and their interaction. We describe a set of experiments on a simplified model geometry typical for low voltage switchgear. In a broad range of experimental conditions and parameters such as arc current, polymeric material or contact material, the voltage, the mass loss and the corresponding pressure build-up are examined. From this raw data, we deduce the arc influence on the ablation process as well as the feedback on some arc plasma properties.

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