摘要:

AbstractThe application of transformation group methods to a system of nonlinear partial differential equations, representing an incompressible M H D plasma, is shown. The structure of the symmetry group is investigated and a theorem of existence of the solutions of the system of equations is given. Some illustrative analytical invariant solutions and their differential invariants will be presented.

ISSN:0863-1042    

DOI:10.1002/ctpp.2150300402

出版商:WILEY‐VCH Verlag    

年代:1990

数据来源: WILEY

摘要:

AbstractUsing hydrodynamical model of the two‐electron‐temperatere plasma, the analytical investigation of parametric instability of electron‐acoustic wave has been made. It is found that the growth rate decreases with increasing concentration ratio of the hot to the total electronsnh0/n0. The growth rate is found to be mo

ISSN:0863-1042    

DOI:10.1002/ctpp.2150300403

出版商:WILEY‐VCH Verlag    

年代:1990

数据来源: WILEY

摘要:

AbstractThe instability of small but finite amplitude waves propagating at the interface of two layers of highly conducting incompressible fluids in relative motion in presence of external uniform magnetic field is studied. Using the method of multiple scales nonlinear evolution equations are derived for both linearly stable and marginally stable cases. It is found that in the linearly stable case both the modes are modulationally unstable. The nonlinear cut‐off wavenumbers are determine

ISSN:0863-1042    

DOI:10.1002/ctpp.2150300404

出版商:WILEY‐VCH Verlag    

年代:1990

数据来源: WILEY

摘要:

AbstractTemperature of sparks produced by automotive ignition systems have been measured spectro‐scopically. It is shown that by adding a capacitor of the order of 10 to 100 pF, temperature of the arc phase of a spark can be considerably increase

ISSN:0863-1042    

DOI:10.1002/ctpp.2150300405

出版商:WILEY‐VCH Verlag    

年代:1990

数据来源: WILEY

摘要:

AbstractWe report on a new method to determine the collision rates for ionization by means of pair collisions (Paarstöße) and stepwise ionization, respectively. This method is based on the experimental and theoretical study of the dynamical behaviour (impedance behaviour) of the positive column of a low‐current discharge at low press

ISSN:0863-1042    

DOI:10.1002/ctpp.2150300406

出版商:WILEY‐VCH Verlag    

年代:1990

数据来源: WILEY

摘要:

AbstractCross sections for single ionization of metastable atoms of H, He, Ne, Ar, Kr, Xe and Rn by electrons with impact energyE(threshold

ISSN:0863-1042    

DOI:10.1002/ctpp.2150300407

出版商:WILEY‐VCH Verlag    

年代:1990

数据来源: WILEY

摘要:

AbstractExperimental observations on stationary striations in the positive column of xenon discharge are reported. Stationary striations are observed when two ionization waves exist simultaneously in the positive column at low pressure and high current region. These stationary striations are caused by nonlinear interference of two backward ionization waves of which frequencies are either equal or are in the ratio 1:2. The spatial intervals for the striated pattern are equal to the reciprocal of the difference between the wave‐numbers of two ionization wave

ISSN:0863-1042    

DOI:10.1002/ctpp.2150300408

出版商:WILEY‐VCH Verlag    

年代:1990

数据来源: WILEY

摘要:

AbstractThe statistics of the ignition behaviour of discharge cells in ac plasma displays and interaction processes occurring between several ignited cells are described and interpreted with a view to basic problems of gas discharge and solid state physics. For the statistical evaluation of ignition lag values recorded by means of a computer controlled equipment the Laue distribution is used.

ISSN:0863-1042    

DOI:10.1002/ctpp.2150300409

出版商:WILEY‐VCH Verlag    

年代:1990

数据来源: WILEY

摘要:

AbstractModern state and ways of development of getter film plasma sources with the magnetic stabilization (GFPS) are considered. The description of physical mechanism of the magnetic stabilization, GFPS constructions and technical characteristics, their confronting parameters and the main factors defining usage perspectives is presented.

ISSN:0863-1042    

DOI:10.1002/ctpp.2150300410

出版商:WILEY‐VCH Verlag    

年代:1990

数据来源: WILEY

摘要:

AbstractWith d. c. vacuum arc discharges the dependence of cathode erosion rate on the transverse magnetic field induction is non‐linear. At first erosion rate rises with the magnetic induction and then drops. The maximum erosion rate value corresponds to the magnetic induction interval (50 – 115) · 10−4T. The range of the vacuum arc discharge maximum stability also corresponds to the same interval. When the magnetic induction rises from 2 · 10−3up to 1.1 · 10−2T (I= 50 A), the erosion products angular distribution monotoneously narrows and with further magnetic ficld enhancement it abruptly widens. Current rise results in increasing extension of erosion products angular distribution. Asymmetry of erosion products angular distribution does not depend on the direction of the magnetic induction vector and gradually vanishes when the magnetic induction rises up to 1 · 10

ISSN:0863-1042    

DOI:10.1002/ctpp.2150300411

出版商:WILEY‐VCH Verlag    

年代:1990

数据来源: WILEY