Direct Real-Time Power Measurement of a High-Power Electron Cyclotron Maser by a Simple One-Point Schottky Detector Signal

Citation data:

IEEE Transactions on Terahertz Science and Technology, ISSN: 2156-342X, Vol: 5, Issue: 5, Page: 779-785

Publication Year:
2015
Citations 5
Citation Indexes 5
Repository URL:
http://scholarworks.unist.ac.kr/handle/201301/17345
DOI:
10.1109/tthz.2015.2462027
Author(s):
Kim, Sung Gug, Kim, Jung Ho, Kim, Dongsung, Won, Jong-Hyo, Lee, Woo Sang, Yang, Jongwon, Choi, EunMi
Publisher(s):
Institute of Electrical and Electronics Engineers (IEEE), Institute of Electrical and Electronics Engineers
Tags:
Physics and Astronomy, Engineering, Gaussian beam, gyrotron, calorimeter, power measurement, antenna gain
article description
Measurements of the absolute power of high-power millimeter/THz wave generators have been considered to be highly variable and to occasionally produce faulty results owing to experimental difficulty. In this study, we propose a calibration-free method for real-time power measurement of an electron cyclotron maser system, a so-called gyrotron. We demonstrate the feasibility of the method by using a recently developed W-band gyrotron with a peak power of tens of kilowatts. The technique is based on transmitter antenna power measurement by using the Friis transmission equation with a defined gyrotron antenna gain. The new technique will allow extremely simple and accurate real-time measurement of output power over a wide dynamic range (> 50 dB) for continuous wave sources to high-power millimeter/THz wave sources with nanosecond pulse lengths.

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