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Gyrotron oscillators are one of promising sources to generate high power terahertz radiation. To achieve high power at high frequency, gyrotrons have to operate at high order modes to alleviate the problem of wall heating and the miniaturization of interaction structures at these frequencies. Due to high order modes, the mode spectrum is very dense and the electron beam is likely to interact with...
A two-dimensional calorimetric diagnostic technique with infrared imaging method has been developed. The technique, which enables the measuring of two-dimensional energy density distribution of intense pulsed ion beam (IPIB) and intense pulsed electron beam (IPEB) with particle energy typically of hundreds of keV, is applicable for the diagnostics of IPIB and IPEB for material treatment purpose such...
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