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High Temperature Material Processes: An International Quarterly of High-Technology Plasma Processes
SJR: 0.19 SNIP: 0.341 CiteScore™: 0.43

ISSN Print: 1093-3611
ISSN Online: 1940-4360

High Temperature Material Processes: An International Quarterly of High-Technology Plasma Processes

DOI: 10.1615/HighTempMatProc.v7.i1.110
6 pages

INVESTIGATION ON BISTABILITY IN INDUCTIVELY-COUPLED PLASMA TORCHES WITH NON-CONVENTIONAL COIL

Davide Bernardi
Universita degli Studi di Bologna, Dipartimento di Ingegneria delle Costruzioni Meccaniche, Nucleari, Aeronautiche e di Metallurgia (D.I.E.M.) and C.I.R.A.M., Via Saragozza 8, 40123 Bologna, Italy
Vittorio Colombo
Università degli Studi di Bologna, Dipartimento di Ingegneria delle Costruzioni Meccaniche, Nucleari, Aeronautiche e di Metallurgia (D.I.E.M.) and C.I.R.A.M., Via Saragozza 8, 40123 Bologna, Italy
Gianni G.M. Coppa
Istituto Nazionale per la Fisica della Materia and Dipartimento di Energetica, Politecnico di Torino, Corso Duca degli Abruzzi 24, 10129 Torino, Italy
Emanuele Ghedini
Università degli Studi di Bologna, Dipartimento di Ingegneria delle Costruzioni Meccaniche, Nucleari, Aeronautiche e di Metallurgia (D.I.E.M.) and C.I.R.A.M., Via Saragozza 8, 40123 Bologna
Andrea Mentrelli
Universita degli Studi di Bologna, Dipartimento di Ingegneria delle Costruzioni Meccaniche, Nucleari, Aeronautiche e di Metallurgia (D.I.E.M.) and C.I.R.A.M., Via Saragozza 8, 40123 Bologna, Italy

ABSTRACT

In previous works on ICPTs with split coil [1.2], the Authors pointed out that for a particular choice of the geometric parameters two equilibrium states for the plasma exist for the same induction coil current. In the present study, a deep investigation of the transition between the two states is performed with a time-dependent simulation code, evidencing a sort of hysteresis phenomenon. A parametric study is carried out in order to find threshold parameters for the bistability in different geometries. For some cases, time oscillating behaviour of plasma is found.


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