Cyclotron-resonance-maser arrays

Abstract

The cyclotron-resonance-maser (CRM) array is a radiation source which consists of CRM elements coupled together under a common magnetic field. Each CRM-element employs a low-energy electron-beam which performs a cyclotron interaction with the local electromagnetic wave. These waves can be coupled together among the CRM elements, hence the interaction is coherently synchronized in the entire array. The implementation of the CRM-array approach may alleviate several technological difficulties which impede the development of singlebeam gyro-devices. Furthermore, it proposes new features, such as the phased-array antenna incorporated in the CRM-array itself. The CRM-array studies may lead to the development of compact, high-power radiation sources operating at low voltages. This paper introduces new conceptual schemes of CRM-arrays, and presents the progress in related theoretical and experimental studies in our laboratory. These include a multimode analysis of a CRM-array, and a first operation of this device with five carbon-fiber cathodes.

Photonic Free-Electron Lasers

“…Here, we have considered Cerenkov radiation as the source of coherent radiation from electrons streaming through a photonic crystal. However, other interaction mechanisms to generate coherent radiation from electrons, e.g., the cyclotron [17], [21], or Smith-Purcell [22] interaction can be used as well. The fact that a low electron beam velocity can be used in combination with power and frequency scaling characteristics makes the pFEL a versatile, compact source of coherent radiation, with a great potential to significantly enhance the available power from Terahertz sources.…”

Spectral measurements of gyrotron oscillator with ferroelectric electron gun

“…10 It can also be shaped to obtain a multielectron-beam device. 11 Using the same design approach ͑two-stage gun with a grid͒, such arrays may produce high total current with a sufficient quality for multibeam microwave-tube arrays.…”

Non-canonical gyrotrons

“…The complex structure of the output radiation requires the development of a new version of the QO converter. For some applications may be interested in two-mirror version eshelette gyrotron [6] shown in Fig. 4.…”

“…Possibility of frequency tuning for these systems is practically absent. Axially symmetric echelette cavity [6] on a some point of view is the development of multi-cavity systems [5] and has similar advantages and disadvantages. It has high selective properties and gyrotron in which such cavity was used in the experiments showed good output characteristics.…”