Contributo in volume, 2023, ENG, 10.1007/978-981-19-6462-6_8

Reabsorption and Density Limit in Magnetized Plasmas Through a First-Principles Toy Model

Carati A.; Zuin M.; Martines E.; Galgani L.

Department of Mathematics, Università degli Studi di Milano, Milano, Italy; CNR ISTP - Istituto per la Scienza e Tecnologia dei Plasmi, Sede di Padova, Italy; Consorzio RFX (CNR, ENEA, INFN, Università di Padova, Acciaierie Venete SpA), Padova, Italy.

In the physics of magnetized plasmas there are problems of principle that apparently still miss a microscopic explanation. A typical case is the reabsorption of cyclotron emission by gyrational electron motions in a magnetic field. On the other hand, it seems that a microscopic explanation of reabsorption is contained in the 1945 paper of Wheeler and Feynman that, however, strangely enough, to our knowledge is never mentioned in this connection. Here we introduce a simple toy model that, on the one hand, contains all the features of the Wheeler-Feynman electrodynamics (which in fact is just the standard electrodynamics, as they repeatedly point out) and, on the other hand, presents such a simple kinematics as to allow for an analytic treatment. In such way reabsorption is proven. As a byproduct, a density limit for magnetic confinement due to a microscopic instability is also deduced.

Keywords

Reabsorption in Magnetized Plasmas, Density Limit in Magnetized Plasmas

CNR authors

Zuin Matteo

CNR institutes

ISTP – Istituto per la Scienza e Tecnologia dei Plasmi

ID: 482198

Year: 2023

Type: Contributo in volume

Creation: 2023-05-31 11:55:24.000

Last update: 2023-05-31 11:55:24.000

CNR authors

External IDs

CNR OAI-PMH: oai:it.cnr:prodotti:482198

DOI: 10.1007/978-981-19-6462-6_8

Scopus: 2-s2.0-85158138691