Optical Spectrometer with a Pulse-to-Pulse Resolution for Terahertz and mm-wave Signalsстатья
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Дата последнего поиска статьи во внешних источниках: 4 июня 2021 г.
Аннотация:The development of ultra-compact particle accelerators and accelerator-based high-power THz generators are some of the top priorities for R&D programs around the world. These tools require the development of accelerating structures, operating in the mm-wave and THz range, where diagnostics are not available or are insufficient. This paper presents the design of a pulse-to-pulse THz spectrometer, primarily developed for diagnostics of accelerating structures and THz radiation sources. In particular, this spectrometer can be used to detect RF pulse shortening caused by vacuum breakdown and beam misalignment in THz accelerators, as well as for bunch length monitoring and radiation source diagnostics. The spectrometer is based on a diffraction grating and is capable of covering a frequency range where RF based breakdown measurements are not possible. We have built and tested the first prototype with different sources in a frequency range of 0.1 – 1.0 THz. In this paper we present the physical design, supported numerical simulations, electronics development, and test results.