Design and development of field emission based magnetron for industrial applications using conformal finite-difference time-domain particle-in-cell simulations
| Autor: | Ling Li, Hua-Yi Hsu, Ming Chieh Lin, Kaviya Aranganadin |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Materials science
Process Chemistry and Technology Vacuum tube Finite-difference time-domain method Mechanical engineering Hot cathode Cathode Surfaces Coatings and Films Electronic Optical and Magnetic Materials law.invention Field electron emission Resonator law Cavity magnetron Materials Chemistry Electrical and Electronic Engineering Instrumentation Microwave |
| Zdroj: | Journal of Vacuum Science & Technology B. 38:023205 |
| ISSN: | 2166-2754 2166-2746 |
| DOI: | 10.1116/1.5140723 |
| Popis: | The magnetron is a high-efficiency high-power vacuum tube that generates microwaves based on the interaction of a stream of moving electrons under crossed electric and magnetic fields with a series of open coupled cavity resonators. They are widely used as a low-cost microwave source for industrial heating. Traditionally, a thermionic cathode is used as the electron source and a heater is needed to increase the temperature of the cathode up to about 1000 K. In this work, a field emission-based magnetron has been investigated for industrial applications as an easier and more robust configuration. The design and development were performed using a conformal finite-difference time-domain particle-in-cell simulation as implemented in the VSim code. A rising-sun configuration has been optimized and the corresponding operating condition has been determined to achieve an efficiency of up to ∼80%. The rising-sun magnetron operating at a frequency of 2.45 GHz can give an output power of 3 kW, serving as a good replacement of existing industrial magnetrons. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|