Physics
Scientific paper
Dec 2005
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005agufmsh53a1244m&link_type=abstract
American Geophysical Union, Fall Meeting 2005, abstract #SH53A-1244
Physics
2730 Magnetosphere: Inner, 2772 Plasma Waves And Instabilities (2471), 2794 Instruments And Techniques, 7534 Radio Emissions
Scientific paper
The principle of natural Maser (Microwave Amplification by Stimulated Emission of radiation) is similar to that of the laboratory optical Laser. Amplification of radiation occurs due to the propagation of an electromagnetic wave through the media with free energy. This free energy may manifest itself in one of two sources. The first is related to the non-equilibrium population inversion of molecular states. Such masers are usually associated with active star formation regions.The second free energy source comes from the non-equilibrium of plasma particle distributions. These distributions are observed in the planetary magnetospheres and have been proposed as the source for Anomalous X-rays Pulsars such as AXP 4U0142+61. The most common form of population inversion for cyclotron masers is the loss-cone distribution, produced as a result of the loss of particles with large pitch angles as they bounce along converging magnetic field lines. Examples of such systems include planetary magnetospheres, flux tubes within an active region of the Sun, flare stars, and field lines connecting the two stars of a close binary system. In spite of their abundance in the Universe the only natural masers that can be studied experimentally in-situ are magnetospheric masers. A new space project, RESONANCE, is aimed at studies of wave-particle interactions and plasma dynamics in the inner magnetosphere. The main goals of the RESONANCE project are as follows: (i) Long-term observations of the natural phenomena and (ii) an artificial influence on the operation of magnetospheric maser. Two satellites will be launched in the magneto-synchronous orbit, that allows the conduction of measurements along a single magnetic flux tube for sufficiently long time intervals, could make it possible to document the details of the long-term evolution of plasma phenomena for a given region. Physical parameters of phenomena and requirements for experiments are discussed.
Demekhov A. G.
Mogilevsky Mikhail
Trakhtengerts Yu. V.
Walker S. N.
Zelenyi Lev M.
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