Spectral response measurements at 70 mK of ultra-sensitive TES detectors in the 34–60 μm wavelength range

Author

de Lange, Gert ; Audley, Michael D. ; Keizer, Geert ; Vreeling, Willem-Jan

Author_Institution

SRON Netherlands Inst. for Space Res., Groningen, Netherlands

fYear

2014

fDate

14-19 Sept. 2014

Firstpage

1

Lastpage

2

Abstract

We have measured the spectral response of sensitive Transition Edge Sensors (NEP ~ 10^-18 W/√Hz) in the frequency range from 1 to 10 THz. The TES sensors have been developed for the SAFARI instrument on SPICA and operate at 70 mK. The sensor is placed in a horn-coupled integrating cavity. We have developed a system with a light pipe that couples radiation from a room temperature Fourier Transform Spectrometer to the device. The attenuation of the light pipe system is of order 60 dB and the coupled power to the device is a few femto-Watts. This system works well and we have analyzed the spectral response of a detector in the short wavelength band of SAFARI (34-60 μm).

Keywords

Fourier transform spectrometers; image sensors; Fourier transform spectrometer; frequency 1 THz to 10 THz; horn coupled integrating cavity; sensitive transition edge sensors; spectral response measurements; temperature 70 mK; ultrasensitive TES detectors; wavelength 34 mum to 60 mum; Cavity resonators; Detectors; Films; Optical filters; Temperature measurement; Wavelength measurement;

fLanguage

English

Publisher

ieee

Conference_Titel

Infrared, Millimeter, and Terahertz waves (IRMMW-THz), 2014 39th International Conference on

Conference_Location

Tucson, AZ

Type

conf

DOI

10.1109/IRMMW-THz.2014.6956426

Filename

6956426