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

fYear

2008

fDate

8-13 June 2008

Firstpage

138

Lastpage

139

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-AlO_x-Al by two angle-evaporation method. The current-voltage characteristic of the tunnel junction showed an ohmic behavior up to bias voltage of ~3k_BT/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-AlO_x-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;

fLanguage

English

Publisher

ieee

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

Type

conf

DOI

10.1109/CPEM.2008.4574691

Filename

4574691