BULLETIN OF THE LEBEDEV PHYISICS INSTITUTE
P.N.Lebedev Physics Institute of the Russian Academy of sciences

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1. Title:
QCD NUCLEAR FACTOR AND MOMENTS OF MULTIPLICITY DISTRIBUTIONS IN HIGHER ORDERS OF PERTURBATION THEORY
Authors:
A.V. Vinogradov.



Abstract:


2. Title:
CHARGE INTERACTION IN A PAUL TRAP
Authors:
A.M. Ignatov.



Abstract:


3. Title:
CAVITATION: PARAMETER CONTROL
Authors:
O.B. Khavroshkin.



Abstract:


4. Title:
PENNING NEON LASER EXCITED BY BACKGROUND-ELECTRON MULTIPLICATION WAVE
Authors:
I.M. Boichenko, A.N. Panchenko, A.E. Telminov, A.A. Fedenev.



Abstract:


5. Title:
THE EFFECT OF PHASE NOISE OF BICHROMATIC RADIATION UPON RESONANCES OF COHERENT POPULATION TRAPPING
Authors:
A.N. Matveev, A.V. Sokolov, A.V. Akimov, V.N. Sorokin, A.Y. Samokotin, N.N. N. N. Kolachevsky.



Abstract:


6. Title:
THE PROPAGATION AND CONVERSION OF NON-AXISYMMETRIC MODES IN STRONGLY NON-UNIFORM HELICON-SUSTAINED PLASMA
Authors:
Y.M. Aliev.



Abstract:
An effect of the radial plasma density gradient on the oblique wave propagation in the helicon-frequency range is investigated. It is shown that the dispersion features of electrostatic and electromagnetic modes are essentially changed in strongly non-uniform helicon plasma. In particular, the transition between helicon eigenmode frequency scales ?? ~ kz and ?? ~ kz2 is demonstrated. The process of total conversion of long-wavelength helicon mode into short-wavelength electrostatic wave in near-axis region of a plasma column is analysed. Due to modification of the wave dispersion relations, the densities at which the mode conversion occurs are considerably reduced if the density gradient is steep enough. The estimation of collisionless axial damping rate of helicon mode connected with linear mode conversion is presented. This damping is compared with the usual collision damping.