Low noise temperature control : application to an active cavity radiometer

Details Low noise temperature control : application to an active cavity radiometer Low noise temperature control : application to an active cavity radiometer

2002-10-14

arxiv.org/abs/physics/0210059v1

Physics

Instrumentation and Detectors

19 pages, 12 figures, Accepted to Rev. Sci. Instrum

Scientific paper

10.1063/1.1525872

We have designed low noise temperature sensing and control units with the objective of using them for the fabrication of far infrared active cavity radiometers. The sensing unit, first characterized at 300K using industrial platinium resistance thermometers, has a noise level of 25E-6 to 30E-6 Keff for a 3 hours measuring time and in a 1Hz bandwidth. Using YBCO superconducting thermometers, the noise level goes down to 2.5E-6 Keff, which is strongly limited by excess 1/f noise in the YBCO film at the superconducting transition. The sample holder used in the 90K experiments is built with an auxiliary heating resistor, which enables an easy and accurate identification of the electrothermal model, even in the closed loop operation. Based on a design previously published by NIST, we estimate from these experimental results that the overall noise limitations of radiometers could be lowered by one order of magnitude.

Affiliated with

Also associated with

No associations

Rating

Low noise temperature control : application to an active cavity radiometer does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Low noise temperature control : application to an active cavity radiometer, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Low noise temperature control : application to an active cavity radiometer will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-412314