Title :
Setup of shot noise measurement in a tunnel junction for noise thermometry
Author :
Song, W. ; Chong, Y. ; Kim, K.T.
Author_Institution :
Korea Res. Inst. of Stand. & Sci., Daejeon
Abstract :
We report our development of a low-temperature shot noise measurement set-up for noise thermometry. We have constructed an experimental set-up for measuring shot noise in the frequency range of 700-1000 MHz. We have fabricated metallic tunnel-junction devices consisting of Al-AlOx-Al by two angle-evaporation method. The current-voltage characteristic of the tunnel junction showed an ohmic behavior up to bias voltage of ~3kBT/e at room temperature. Also, the characteristics of RF components including RF amplifiers, circulators, directional couplers were investigated.
Keywords :
aluminium; noise measurement; radiofrequency amplifiers; shot noise; thermometers; Al-AlOx-Al; RF amplifiers; RF circulators; RF directional couplers; current-voltage characteristics; double-angle-evaporation method; frequency 700 MHz to 1000 MHz; low-temperature shot noise measurement; metallic tunnel-junction devices; noise thermometry; 1f noise; Circuit noise; Circulators; Low voltage; Noise measurement; Optical noise; Radio frequency; Radiofrequency amplifiers; Superconducting device noise; Temperature;
Conference_Titel :
Precision Electromagnetic Measurements Digest, 2008. CPEM 2008. Conference on
Conference_Location :
Broomfield, CO
Print_ISBN :
978-1-4244-2399-6
Electronic_ISBN :
978-1-4244-2400-9
DOI :
10.1109/CPEM.2008.4574691
