A PROPOSAL TO USE MICROWAVE CAVITIES TO STUDY THE SURFACE PROPERTIES OF HIGH DENSITY PLASMAS

1961 ◽  
Vol 39 (12) ◽  
pp. 1901-1910 ◽  
Author(s):  
F. L. Curzon ◽  
Roger Howard
Keyword(s):  
Surface Properties ◽  
Dynamic Properties ◽  
High Density ◽  
Microwave Cavity ◽  
Microwave Cavities ◽  
Z Pinch

It is suggested that the resonant properties of a cylindrical microwave cavity containing a highly conducting axial plasma rod could be used to obtain information about the dynamic properties of such a plasma. Two applications of the method are considered: an investigation of electrically exploded wires, and a study of the dynamics of the conventional z-pinch during its initial stages.

scholarly journals Los Alamos Compact Toroid, Fast Liner, and High-Density Z-Pinch Programs

1982 ◽  
pp. 463-481 ◽  
Author(s):  
R. K. Linford ◽  
◽  
A. R. Sherwood ◽  
J. E. Hammel ◽  
◽  
...  
Keyword(s):  
High Density ◽  
Los Alamos ◽  
Compact Toroid ◽  
Z Pinch

scholarly journals Surface Properties of Pine Scrimber Panels with Varying Density

Coatings ◽  
2019 ◽  
Vol 9 (6) ◽  
pp. 397 ◽  
Author(s):  
Jinguang Wei ◽  
Qiuqin Lin ◽  
Yahui Zhang ◽  
Wenji Yu ◽  
Chung-Yun Hse ◽  
...  
Keyword(s):  
Surface Roughness ◽  
Surface Properties ◽  
Photoelectron Spectroscopy ◽  
Lower Surface ◽  
Contact Angles ◽  
High Density ◽  
Water Contact ◽  
Change Rate ◽  
Hydrophilic Material ◽  
Wood Grain

Coating quality for scrimber products against exterior conditions is largely dependent on the surface properties. The wettability, morphology, and chemical composition of pine scrimber surfaces were investigated to better understand the surface properties. The scrimber was found to be a hydrophilic material because the water contact angles were less than 90°. The panels with a density of 1.20 g/cm3 had the largest angle change rate (k = 0.212). As the panel density increased, the instantaneous contact angle of each test liquid (i.e., water, formamide, and diiodomethane) on the panels decreased, and so did surface free energy. Panels with higher density showed lower surface roughness. Surface roughness across the wood grain was greater than that along the grain. SEM observations showed the high-density panels had a smoother surface with fewer irregular grooves in comparison with the low-density panels. X-ray photoelectron spectroscopy (XPS) analysis indicated that more unoxygenated groups appeared on the surface of high-density panels.

Spectroscopic investigation of high-density plasmas produced in a Z-pinch

1978 ◽  
Vol 20 (5) ◽  
pp. 467-476 ◽  
Author(s):  
K.H. Finken ◽  
G. Bertschinger ◽  
S. Maurmann ◽  
H.-J. Kunze
Keyword(s):  
Spectroscopic Investigation ◽  
High Density ◽  
Z Pinch

Electrical conductivity and capacitance spectra of Bi1.37Sm0.13Zn0.92Nb1.50O6.92 pyrochlore ceramic in the range of 0–3 GHz

2014 ◽  
Vol 07 (02) ◽  
pp. 1450018 ◽  
Author(s):  
A. F. Qasrawi ◽  
Faten M. Bzour ◽  
Eman O. Nazzal ◽  
A. Mergen
Keyword(s):  
Electrical Conductivity ◽  
Electric Field ◽  
Dielectric Breakdown ◽  
Microwave Cavity ◽  
Frequency Range ◽  
Pass Filter ◽  
Low Pass Filter ◽  
Microwave Cavities ◽  
Rejection Filter ◽  
Low Pass

In this work, the electrical properties of samarium-doped bismuth niobium zinc oxide ( Sm -doped BZN ) pyrochlore ceramics are investigated by means of temperature dependent electrical conductivity and capacitance spectroscopy in the frequency range of 0–3 GHz. It was observed that the novel dielectric Sm - BZN ceramic exhibits a temperature and electric field dependent dielectric breakdown. When measured at 300 K, the breakdown electric field is 1.12 kV/cm and when heated the breakdown temperature is ~ 420 K. The pyrochlore is thermally active above 440 K with conductivity activation energy of 1.37 eV. In addition, the room temperature capacitance spectra reflected a resonance–antiresonance switching property at 53 MHz when subjected to an AC signal of low power of 5 dBm. Furthermore, when the Sm - BZN ceramics are used as microwave cavity and tested in the frequency range of 1.0–3.0 GHz, the cavity behaves as low pass filter with wide tunability up to a frequency of 1.91 GHz. At this frequency it behaves as a band rejection filter that blocks waves of 1.91 GHz and 2.57 GHz frequencies. These properties of the Sm -doped BZN are promising as they indicate the usability of the ceramics in digital electronic circuits as resonant microwave cavities suitable for the production of low pass/rejection band filters.

Phase structural analyses of polyethylene extrusion coatings on high-density papers. II. Influence of paper surface properties on the polyethylene morphology

2003 ◽  
Vol 91 (1) ◽  
pp. 226-234 ◽  
Author(s):  
Knut Magne Furuheim ◽  
David E. Axelson ◽  
Henrik W. Antonsen ◽  
Torbj�rn Helle
Keyword(s):  
Surface Properties ◽  
High Density ◽  
Paper Surface

scholarly journals The stability of the high-density z-pinch

1989 ◽  
Author(s):  
A. H. Glasser ◽  
R. A. Nebel
Keyword(s):  
High Density ◽  
The Stability ◽  
Z Pinch
Sign in / Sign up

Export Citation Format

Share Document