电子科学与技术学院2017年学术报告会之四十九-High power broadband Gyro-amplifiers
来源：电子科学与技术学院 浏览：1648 时间：2017-12-20
题目：High power broadband Gyro-amplifiers towards terahertz range
The gyrotron travelling wave amplifiers (Gyro-TWA) are high power coherent broadband sources that excel at high frequencies (up to the terahertz range) and have many applications including electron spin resonance and manipulations, fast data-rate communications, high resolution RADAR, plasma diagnostics and remote sensing. Recent breakthrough in the research and development of the gyro-TWAs at University of Strathclyde has resulted in unprecedented operating frequency bandwidth and output power. This is due to ideal dispersion properties existed in a helically corrugated interaction region (HCIR). The principle and frequency scalability of the gyro-TWAs using HCIRs are discussed. Demonstration and experimental results at 90-100 GHz frequency will be presented. Future work of the gyro-TWAs operating in the higher terahertz range will also be presented.
Wenlong He received the B.Sc. degree in physics from Soochow University in 1983, the M.Sc. degree in accelerator physics from the China Academy of Engineering Physics in 1988, and the Ph.D. degree in high power microwave from the Department of Physics, University of Strathclyde in 1995. He is currently an Advanced Fellow with the Scottish Universities Physics Alliance. His main research interests include relativistic electron beams, FELs (Free Electron Lasers), Gyro-TWA/BWOs (Gyrotron travelling wave amplifiers/backward-wave oscillators), MB-TWTs (multi-beam travelling wave tubes) for mm-wave/terahertz sources and amplifications. Dr He leads a research team in the University of Strathclyde carrying out cutting-edge research on high power mm-wave and terahertz generation and amplification using both fast and slow wave interaction structures. Dr He is the mastermind of the mm-wave/terahertz gyro-TWA technology developed in Strathclyde which offers 100s times higher power bandwidth product than any other existing device. Dr He has authored over 90 refereed journal papers including 7 published in Physical Review Letters. He is a guest editor for IEEE Trans. on Plasma Science Special Edition. He is an executive member of IET RF & Microwave Committee (UK) coordinating the "mm-wave for 5G" telecommunications program. Dr He, representing the University of Strathclyde, is also an invited member of UK 5G Innovation Centre in the University of Surrey. Dr He leads an international research MARTHA (the Magnetic Resonance enabled by Terahertz Amplifiers) consortium that consists from the world leading EPR(Electron Paramagnetic Resonance) and DNP (Dynamic Nuclear Polarization) experts from ETH Zurich, Bruker Biospin, the University of St Andrews, etc.