Title :
Hilbert-transform spectroscopy with high-T/sub c/ Josephson junctions: first spectrometers and first applications
Author :
Divin, Y.Y. ; Poppe, U. ; Urban, K. ; Volkov, O.Y. ; Shirotov, V.V. ; Pavlovskii, V.V. ; Schmueser, P. ; Hanke, K. ; Geitz, M. ; Tonutti, M.
Author_Institution :
Inst. fur Festkorperforschung, Forschungszentrum Julich GmbH, Germany
fDate :
6/1/1999 12:00:00 AM
Abstract :
First laboratory prototypes of Hilbert-transform spectrometers have been developed. To meet the requirements of Hilbert-transform spectroscopy, high-T/sub c/ Josephson junctions with RSJ-like behavior have been fabricated on twin-free NdGaO/sub 5/ bicrystal substrates. The operation of the spectrometers has been demonstrated from 60 GHz up to 2.25 THz. The first out-of-lab application of Hilbert-transform spectrometers has been successfully demonstrated at the TESLA Test Facility linear accelerator at DESY (Hamburg). The spectra of coherent transition electromagnetic radiation from electron bunches have been measured and a bunch length of /spl sigma//sub t/=1.2 ps has been derived from these spectra. The market perspectives for Hilbert spectrometers have been estimated.
Keywords :
Hilbert transforms; high-temperature superconductors; millimetre wave spectroscopy; particle beam bunching; particle beam diagnostics; submillimetre wave spectroscopy; superconducting junction devices; superconducting particle detectors; transition radiation; 60 GHz to 2.25 THz; HTSC Josephson junctions; Hilbert-transform spectroscopy; NdGaO/sub 5/; RSJ-like behavior; TESLA Test Facility linear accelerator; bunch length diagnostics; coherent transition electromagnetic radiation; electron bunches; prototype spectrometers; quasi-optical spectrometer; twin-free NdGaO/sub 5/ bicrystal substrates; Electromagnetic measurements; Electromagnetic radiation; Electrons; Josephson junctions; Laboratories; Length measurement; Linear accelerators; Prototypes; Spectroscopy; Test facilities;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
