We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Superconducting NbN Coplanar Switch Driven by DC Current for CMB Instruments.
- Authors
Bordier, G.; Cammilleri, V.; Bélier, B.; Bleurvacq, N.; Ghribi, A.; Piat, M.; Tartari, A.; Zannoni, M.
- Abstract
The next generations of cosmic microwave background (CMB) instruments will be dedicated to the detection and characterisation of CMB B-modes. To measure this tiny signal, instruments need to control and minimise systematics. Signal modulation is one way to achieve such a control. New generation of focal planes will include the entire detection chain on chip. In this context, we present a superconducting coplanar switch driven by DC current. It consists of a superconducting micro-bridge which commutes between its on (superconducting) and off (normal metal) states, depending on the amplitude of the current injection. To be effective, we have to use a high normal state resistivity superconducting material with a gap frequency higher than the frequencies of operation (millimeter waves). Several measurements were made at low temperature on NbN and yielded very high resistivities. Preliminary results of components dc behavior is shown. Thanks to its low power consumption, fast modulation and low weight, this component is a perfect candidate for future CMB space missions.
- Subjects
COSMIC background radiation; SUPERCONDUCTORS; COPLANAR transmission lines; INTERFEROMETRY; MILLIMETER waves
- Publication
Journal of Low Temperature Physics, 2014, Vol 176, Issue 5/6, p663
- ISSN
0022-2291
- Publication type
Article
- DOI
10.1007/s10909-014-1103-y