Taking into account the interaction of an electron with interface optical phonons as well as bulk longitudinal optical phonons, we study the cyclotron resonance of magnetopolarons at the interfaces of polar crystals. We consider both the absorption and emission processes in our calculation using the Green’s function method at finite temperatures. Consequently, different temperature characterist...

Injection from an external ion source into a cyclotron results in unavoidable emittance growth when the cyclotron’s first turn radius is small compared with the pole gap. In such a congested geometry, the injected beam first has the two transverse directions coupled on entering the axial magnetic field of the cyclotron, then transverse and longitudinal phase spaces are coupled by the inflector....

We examine some implications of inertial range and dissipation range correlation and spectral analyses extracted from 33 intervals of Wind magnetic field data. When field polarity and signatures of cross helicity and magnetic helicity are examined, most of the data sets suggest some role of cyclotron-resonant dissipative processes involving thermal protons. We postulate that an active spectral ...

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Electron cyclotron resonance heating and electron cyclotron current drive, disruptive events, and sawtooth activity are all known to produce suprathermal electrons in fusion devices, motivating increasingly detailed studies of the generation and dynamics of this suprathermal population. Measurements have been performed in the past years in the tokamak a configuration variable (TCV) tokamak usin...

This paper introduces a new software solution for cyclotron control system design and validation that named Cyclotron Virtual Control Platform (CVCP) and gives implementations in framework design. This software platform has abilities to simulate the processes and conditions in normal cyclotrons such as start up and shut down, routine operations, beam current regulation with combination of built...

We demonstrate a novel detection method for the cyclotron resonance frequency of an electron plasma in a Penning–Malmberg trap. With this technique, the electron plasma is used as an in situ diagnostic tool for the measurement of the static magnetic field and the microwave electric field in the trap. The cyclotron motion of the electron plasma is excited by microwave radiation and the temperatu...

BACKGROUND The superconducting cyclotron is of great importance to treat cancer parts of the body. To reduce the operation costs, a superconducting magnet system for the 250 MeV proton cyclotron was designed to confirm the feasibility of the superconducting cyclotron. FINDINGS The superconducting magnet system consists of a pair of split coils, the cryostat and a pair of binary high temperatu...

In a standard pulsar model, the radio emission is produced in the relativistic, strongly magnetized electron-positron plasma in the polar-cap region of the magnetosphere. Waves are generated well below the cyclotron frequency and must propagate through the cyclotron resonance region where they are affected by the resonance. Wave dispersion near the cyclotron resonance is discussed in the formal...

Localized direct electron heating by mode-converted ion cyclotron range of frequencies (ICRF) waves in D(H) tokamak plasmas has been clearly observed for the first time in Alcator C-Mod. Both onand off-axis (high field side) mode conversion electron heating (MCEH) have been observed. The MCEH profile was obtained from a break in slope analysis of electron temperature signals in the presence of ...