title: Design of interferometer system for Keda Torus eXperiment using terahertz solid-state diode sources.
abstract: A solid-state source based terahertz (THz) interferometer diagnostic system has been designed and characterized for the Keda Torus eXperiment (KTX). The THz interferometer utilizes the planar diodes based frequency multiplier (X48) to provide the probing beam at fixed frequency 0.650 THz, and local oscillator is provided by an independent solid-state diode source with tunable frequency (0.650 THz +/- 10 MHz). Both solid-state sources have approximately 1 mW power. The planar-diode mixers optimized for high sensitivity, ∼750 mV/mW, are used in the heterodyne detection system, which permits multichannel interferometer on KTX with a low phase noise. A sensitivity of ⟨nel⟩min = 4.5 × 10(16) m(-2) and a temporal resolution of 0.2 μs have been achieved during the initial bench test.
authors.affiliation: School of Physics, University of Science and Technology of China, Hefei, Anhui 230026, People's Republic of China.
authors.forename: Jinlin
authors.initials: J
authors.lastname: Xie
authors.affiliation: School of Physics, University of Science and Technology of China, Hefei, Anhui 230026, People's Republic of China.
authors.forename: Haibo
authors.initials: H
authors.lastname: Wang
authors.affiliation: School of Physics, University of Science and Technology of China, Hefei, Anhui 230026, People's Republic of China.
authors.forename: Weixing
authors.initials: W
authors.lastname: Ding
authors.affiliation: School of Physics, University of Science and Technology of China, Hefei, Anhui 230026, People's Republic of China.
authors.forename: Hong
authors.initials: H
authors.lastname: Li
authors.affiliation: School of Physics, University of Science and Technology of China, Hefei, Anhui 230026, People's Republic of China.
authors.forename: Tao
authors.initials: T
authors.lastname: Lan
authors.affiliation: School of Physics, University of Science and Technology of China, Hefei, Anhui 230026, People's Republic of China.
authors.forename: Adi
authors.initials: A
authors.lastname: Liu
authors.affiliation: School of Physics, University of Science and Technology of China, Hefei, Anhui 230026, People's Republic of China.
authors.forename: Wandong
authors.initials: W
authors.lastname: Liu
authors.affiliation: School of Physics, University of Science and Technology of China, Hefei, Anhui 230026, People's Republic of China.
authors.forename: Changxuan
authors.initials: C
authors.lastname: Yu