Cyclotron resonance (CR) is considered one of the fundamental phenomena in conducting systems. In this paper, we study CR a gated two-dimensional (2D) electron system (ES). Namely, analyze absorption electromagnetic radiation incident normal to 2DES, where standard dielectric substrate separates 2D sheet and metallic steering electrode ("gate"); whole placed perpendicular magnetic field. Our an...

Mechanisms for the deposition of heat in the lower coronal plasma are discussed, emphasizing recent attempts to reconcile the Ñuid and kinetic perspectives. Structures at magnetohydrodynamic (MHD) scales may drive a nonlinear cascade, preferentially exciting high perpendicular wavenumber Ñuctuations. Relevant dissipative kinetic processes must be identiÐed that can absorb the associated energy ...

A new design has been explored for a superconductingcoil-based compact cyclotron, which has many practical benefits over conventional superconducting cyclotrons. The iron yoke and poles in conventional superconducting cyclotrons have been avoided in this design. The azimuthally varying field is generated by superconducting sector-coils. The superconducting sector-coils and the circular main-coi...

A cyclotron-resonance maser (CRM) experiment is performed in a high-gradient magnetic field using a low-energy electron beam ( approximately 10 keV/1 A). The magnetic field exceeds 1.63 T, which corresponds to a 45-GHz cyclotron frequency. The CRM radiation output is observed in much lower frequencies, between 6.6 and 20 GHz only. This discrepancy is explained by the finite penetration depth of...

Terahertz photovoltaic detection of cyclotron resonance in the regime of radiation-induced magnetoresistance oscillations Report Title We examine and compare the diagonal magnetoresistance, R-xx, and the photovoltage induced by microwave (42 <= f <= 300 GHz) and terahertz (f >= 300 GHz) photoexcitation in the high mobility quasi-two-dimensional GaAs/AlGaAs system. The data demonstrate strong ra...

Cyclotron frequency of a crystal electron is, in general, not an easily accessible parameter. Nevertheless, its calculation can be simplified when the symmetry properties of the band structure and those of the motion equations in the magnetic field are simultaneously taken into account. In effect, a combined symmetry of the electron Hamiltonian and that of the Lorentz equation provide us with a...