The electron beam-plasma system is ubiquitous in the space plasma environment. Here, using a Darwin particle-in-cell method, the excitation of electrostatic and whistler instabilities by a gyrating electron beam is studied in support of recent laboratory experiments. It is assumed that the total plasma frequency (xpe) is larger than the electron cyclotron frequency (Xe). The fast-growing electr...

A set of constraints is derived for the operating characteristics of tokamak power reactors which are bulk heated by electron cyclotron resonance heating (ECRH). Four heating modes are considered: ordinary wave heating at the electron cyclotron frequency, 0, and at the second harmonic frequency, 20, and extraordinary wave heating at 0 and at 20. For ordinary wave heating at 1, which appears to ...

Extra Ordinary (X) mode conversion to Bernstein wave near Upper Hybrid Resonance (UHR) layer plays an important role in plasma heating through cyclotron resonance. Wave generation at UHR and parametric decay at high power has been observed during Electron Cyclotron Resonance (ECR) heating experiments in toroidal magnetic fusion devices. A small linear system with ECR and UHR layer within the sy...

Compositeness of the electron may show up in a very small deviation of the measured electron g factor from one calculated for a point electron by quantum electrodynamics. The precision of our g measurements is currently limited by an interaction of the cyclotron motion with standing waves in the trap cavity containing the electron. The important element introduced here is the systematic explora...

The boundary conditions in an electron cyclotron resonance (ECR) source have been modified to mimic the operating conditions where current-free double-layers (DLs) have been recently measured in rf helicon plasmas. The plasma is heated or generated by the ECR at 875 G inside a dielectric source tube, and expands into a grounded diffusion chamber (terminated by a glass plate) by a rapidly decrea...

EPR and cyclotron resonance investigations have been performed on laser annealed Si wafers, leading to the identification of the [V + Oi]complex in virgin Si and to a donor signal quenching in P-implanted Si. Revue Phys. Appl. 15 (1980) 21-23 JANVIER 1980, PAGE 1 Classification Physics Abstracts 73.20Hb 76.30 79.20Ds Introduction. Laser annealing techniques have been investigated recently for i...

The performance of Electron Cyclotron Resonance Ion Sources (ECRIS), producing high charge state ions from a great variety of elements, has improved dramatically over the past decades, thus enabling significant advances in accelerator-based nuclear physics. The orderof-magnitude performance leaps of ECR ion sources, e.g. from 15 μA of extracted O in 1974 [1] to 4700 μA in 2016 [2], result from ...

We report on the observation of collective radiative decay, or superradiance, of cyclotron resonance (CR) in high-mobility two-dimensional electron gases in GaAs quantum wells using time-domain terahertz magnetospectroscopy. The decay rate of coherent CR oscillations increases linearly with the electron density in a wide range, which is a hallmark of superradiant damping. Our fully quantum mech...

FAR-TECH, Inc. is developing a hybrid, quasi-three dimensional (Quasi-3D) model to simulate charge breeding of a test 1+ or 2+ ion beam in an electron cyclotron resonance ion source (ECRIS). The model is a combination of three dimensional (3D) mapping of the plasma background calculated by a 1D Generalised ECRIS Model (GEM-1D) [1] and 3D tracking of the ion trajectories with Monte Carlo Charge ...