New PDF release: Physics of Collisional Plasmas: Introduction to

By Michel Moisan

ISBN-10: 9400745575

ISBN-13: 9789400745575

ISBN-10: 9400745583

ISBN-13: 9789400745582

This textual content is an advent to the physics of collisional plasmas, in place of plasmas in house. it really is meant for graduate scholars in physics and engineering . the 1st bankruptcy introduces with gradually expanding aspect, the elemental techniques of plasma physic. The movement of person charged debris in numerous configurations of electrical and magnetic fields is designated within the moment bankruptcy whereas the 3rd bankruptcy considers the collective movement of the plasma debris defined based on a hydrodynamic version. The fourth bankruptcy is most unusual in that it introduces a normal method of strength stability, legitimate for every type of discharges comprising direct current(DC) and excessive frequency (HF) discharges, together with an utilized static magnetic box. the fundamental suggestions required during this fourth bankruptcy were gradually brought within the earlier chapters.

The textual content is enriched with approx. a hundred figures, and alphabetical index and forty five absolutely resolved difficulties. Mathematical and actual appendices offer complementary info or let to head deeper in a given subject.

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Extra info for Physics of Collisional Plasmas: Introduction to High-Frequency Discharges

Sample text

D ≈ λDe . 5, which proposes an alternative interpretation of the Debye length. 9. e. ν ωpα . This condition is easier to realise with electrons ωpi ), which justifies, in a number of cases, the asthan with ions ωpe sumption of a continuous background of ions to ensure plasma neutrality. 10. e L λD . Another condition, already mentioned in Sect. 2, is that ν ωpe . The number of charges ND in a Debye sphere should be much larger than 1, otherwise this is a “non-ideal” plasma, in which there is no screening effect: this condition can be written: ND ≡ n 4 3 πλ 3 D 1.

The plasma is formed, in a transition stage, by a process of electron multiplication called the avalanche (or breakdown) due to the application of a potential difference: the few electrons initially present, accelerated by the electric field, ionise the atoms (molecules) of the gas by collisions, thus augmenting the number of electrons. This growth in the number of electrons ceases after a few hundred micro-seconds, when a stationary state is attained. In periodic low frequency discharges, the frequency of the maintenance current is assumed to be sufficiently small, such that all the electrical parameters of the plasma are in equilibrium with the applied field.

32 1 Definition and orders of magnitude of principal quantities 8. e. λD ≈ λDe . 5, which proposes an alternative interpretation of the Debye length. 9. e. ν ωpα . This condition is easier to realise with electrons ωpi ), which justifies, in a number of cases, the asthan with ions ωpe sumption of a continuous background of ions to ensure plasma neutrality. 10. e L λD . Another condition, already mentioned in Sect. 2, is that ν ωpe . The number of charges ND in a Debye sphere should be much larger than 1, otherwise this is a “non-ideal” plasma, in which there is no screening effect: this condition can be written: ND ≡ n 4 3 πλ 3 D 1.

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Physics of Collisional Plasmas: Introduction to High-Frequency Discharges by Michel Moisan


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