Skip to main content
U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

A Mo-Cu Superconducting Transition-Edge Microcalorimeter with 4.5 eV Energy Resolution at 6 keV

Published

Author(s)

Kent D. Irwin, Gene C. Hilton, John M. Martinis, Steven Deiker, Norman F. Bergren, Sae Woo Nam, David A. Rudman, David A. Wollman

Abstract

We describe a superconducting transition-edge microcalorimeter with an energy resolution of 4.5 1 0.1 eV full-width at half-maximum (FWHM) for Mn Kα X-rays from an 55Fe source. The thermometer consists of a photolithographically patterned Mo-Cu superconducting proximity bilayer with a 93 mK transition temperature. The device is fabricated on a Si3 N4 membrane patterned as a flyswatter to control the thermal conductance to the heat bath. The sensor is voltage biased with an on-chip shunt resistor, and the current is measured by a two-stage SQUID amplifier consisting of a single first-stage SQUID and a series-array second-stage SQUID.
Citation
Nuclear Instruments & Methods in Physics Research Section A-Accelerators Spectrometers Detectors and Associated Equipment
Volume
444
Issue
2000

Keywords

Microcalorimeter, transition-edge sensor, x-rays

Citation

Irwin, K. , Hilton, G. , Martinis, J. , Deiker, S. , Bergren, N. , Nam, S. , Rudman, D. and Wollman, D. (2000), A Mo-Cu Superconducting Transition-Edge Microcalorimeter with 4.5 eV Energy Resolution at 6 keV, Nuclear Instruments & Methods in Physics Research Section A-Accelerators Spectrometers Detectors and Associated Equipment, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=8065 (Accessed February 26, 2024)
Created December 30, 2000, Updated October 12, 2021