摘要:

AbstractThe article attempts to summarize the most important knowledge about the analysis of a Langmuir probe at middle pressures. First it briefly reviews the recent theories which deal with interpretation of Langmuir probe data at such conditions and then it applies the theory to the measurements in a Neon discharge at pressures 1.86 and 2.46 kPa. The charged particle density and the electron temperature obtained from the same probe data using different theories is compared against each other and a satisfactory agreement is obtained. The recommended procedure of probe data interpretation is given at the end of the paper.

ISSN:0863-1042    

DOI:10.1002/ctpp.2150300202

出版商:WILEY‐VCH Verlag    

年代:1990

数据来源: WILEY

摘要:

AbstractLangmuir probe measurements in argon flowing afterglow are presented together with probe data analyses. The charged particles density is evaluated from the electron probe current at the space potential and from the saturated positive ion current. The latter is analysed using the method by Zakrzewski and Kopiczynski [15, 16] and both results are compared against each other. A satisfactory agreement almost within the estimated experimental error range suggests that the method [15, 16]brings a reasonable description of a positive ion collection by a Langmuir probe.

ISSN:0863-1042    

DOI:10.1002/ctpp.2150300203

出版商:WILEY‐VCH Verlag    

年代:1990

数据来源: WILEY

摘要:

AbstractThe sheath thicknesses and numbers of collisions from an infinite fluid model of the space between an atomic cold gas plasma and a planar wall are reported in dependence on the normalized ionisation, ion elastic and charge exchange collision frequences. The Bohm criterion validity, ion heating in double layer electric field, volume radiative recombination and related questions are discussed.

ISSN:0863-1042    

DOI:10.1002/ctpp.2150300204

出版商:WILEY‐VCH Verlag    

年代:1990

数据来源: WILEY

摘要:

AbstractThe VUV emissions (155 Å) of laser produced plasma on massive plane targets with differentZnumbers are recorded according three laser wavelengths with a pinhole camera associated with a multilayered mirror.The 2Ddimensions of these VUV images are compared with the sizes of the focal spots through the 1 Kev pinhole image sizes recorded at the same laser intensity (51014W/cm2, 600 ps). The lateral and axial dimensions of the VUV emissions of Al, Cu, Au plasmas are analyzed and give informations on the radiations‐hydrodynamic behavior of Laser heated plane targets with respect to the wavelength of the incident las

ISSN:0863-1042    

DOI:10.1002/ctpp.2150300205

出版商:WILEY‐VCH Verlag    

年代:1990

数据来源: WILEY

摘要:

AbstractA previous theoretical model is enlarged to elucidate some features of the optogalvanic signals originating from the metastable states in hollow cathode neon discharges. Numerical experiments were performed on the basis of this model to obtain the time evolution of the optogalvanic signals in pulsed and chopped cw experiments at 588.2 nm for different discharge currents and different laser intensities. The predictions of the numerical experiments were found to be in qualitative agreement with real experimental results.

ISSN:0863-1042    

DOI:10.1002/ctpp.2150300206

出版商:WILEY‐VCH Verlag    

年代:1990

数据来源: WILEY

摘要:

AbstractA comparative investigation is carried out of the discharge characteristics (current‐voltage characteristic and dependence of the running voltage on the gas pressure at constant discharge current), as well as of some plasma parameters (electron temperature, floating potential and plasma potential) and densities of the ion current extracted to the substrate, for discharges in neon and argon in a planar magnetron system for sputtering with a graphite targe

ISSN:0863-1042    

DOI:10.1002/ctpp.2150300207

出版商:WILEY‐VCH Verlag    

年代:1990

数据来源: WILEY

摘要:

AbstractA dispersion equation for low‐frequency waves in a fully ionized plasma with slowly varying density and magnetic field is derived from the two‐fluid equations. The solutions are discussed in several limiting cases. Phase‐velocity and refractive index surfaces are presented for the fast and slow magneto‐acoustic waves and for the shear‐Alfvén wave, influenced by the inhomogene

ISSN:0863-1042    

DOI:10.1002/ctpp.2150300208

出版商:WILEY‐VCH Verlag    

年代:1990

数据来源: WILEY

摘要:

AbstractThe equation and dispersion relation describing the magnetic electron drift vortex mode in a generalized equilibrium are presented. The results are useful for investigating related surface wave problems as well as for identifying the various forms of the magnetic electron drift vortex mode.

ISSN:0863-1042    

DOI:10.1002/ctpp.2150300209

出版商:WILEY‐VCH Verlag    

年代:1990

数据来源: WILEY

摘要:

AbstractThe stopping power of charged particles is determined in the random phase approximation using Lenard Balescu type collision integrals. The stopping power is closely related to other single particle properties such as self energy and quasi particle life time.In this part I, numerical evaluations are given for equal masses (of test and target particles).

ISSN:0863-1042    

DOI:10.1002/ctpp.2150300210

出版商:WILEY‐VCH Verlag    

年代:1990

数据来源: WILEY

摘要:

AbstractThe electroconductivity of partially ionized cesium and sodium plasmas is calculated within the frame of the Chapman‐Enskog method. The composition of the plasma and the transport cross section for electron‐electron and electron‐ion scattering were evaluated in previous papers (Redmer et al. [1], Sigeneger et al. [2]). This paper is mainly devoted to the influence of neutrals on the electroconductivity. Therefore, the total and transport cross section for electron‐atom scattering are determined numerically. The results for the cross sections and the conductivity are compared with experiments and other theoretical app

ISSN:0863-1042    

DOI:10.1002/ctpp.2150300211

出版商:WILEY‐VCH Verlag    

年代:1990

数据来源: WILEY