We describe a method for measuring the complex impedance of transition-edge-sensor
(TES) calorimeters. Using this technique, we measured the impedance of a Mo/Au …

We present measurements from a series of transition-edge x-ray microcalorimeters
designed for optimal energy resolution. We used the geometry of the sensors to control their …

A transition edge sensor (TES) is an X-ray microcalorimeter based on a thin film
superconductor voltage-biased within its resistive transition. This superconductor is usually …

We present fabrication details of our Mo/Au X-ray microcalorimeters, which are being
developed as one of the candidate high resolution spectrometers for the Constellation-X …

The performance of X-ray microcalorimeters with a Ti/Au Transition Edge Sensor (TES) and
a Cu absorber has been investigated. With these microcalorimeters we achieve energy …

We are developing X-ray calorimeters to meet the specifications of the Constellation-X
mission. Each calorimeter consists of a transition-edge-sensor (TES) thermometer, which is …

Low-temperature detectors offer single particle detection with high-energy resolution and
low-energy threshold, what is of interest for applications both in fundamental physics and …

We have made Radio-Frequency Single-Electron Transistors (RF-SETs) with large input
gates, and tested performance and modes of operation with the goal of using such devices …

The development of an array of voltage biased superconducting transition edge
microcalorimeters is described. This work is directed to an application in future X-ray …

This paper describes single pixel microcalorimeters with a superconductor-to-normal phase
transition thermometer, as developed for high resolution X-ray spectroscopy, and discusses …