Transition Edge Sensor-Energy Dispersive Spectrometer (TES-EDS) and Its Applications

Keiichi TANAKA  Akikazu ODAWARA  Atsushi NAGATA  Yukari BABA  Satoshi NAKAYAMA  Shigenori AIDA  Toshimitsu MOROOKA  Yoshikazu HOMMA  Izumi NAKAI  Kazuo CHINONE 

Publication
IEICE TRANSACTIONS on Electronics  Vol.E92-C  No.3  pp.334-340
Publication Date: 2009/03/01
Online ISSN: 1745-1353
Print ISSN: 0916-8516
Type of Manuscript: Special Section PAPER (Special Section on Recent Progress in Superconducting Analog Devices and Their Applications)
Category: INVITED
Keyword: 
energy dispersive X-ray detector,  scanning electron microscope,  superconducting transition temperature,  dilution refrigerator,  high energy resolution, 

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Summary: 
The Transition Edge Sensor (TES)-Energy Dispersive Spectrometer (EDS) is an X-ray detector with high-energy resolution (12.8 eV). The TES can be mounted to a scanning electron microscope (SEM). The TES-EDS is based on a cryogen-free dilution refrigerator. The high-energy resolution enables analysis of the distribution of various elements in samples under low acceleration voltage (typically under 5 keV) by using K-lines of light elements and M lines of heavy elements. For example, the energy of the arsenic L line differs from the magnesium K line by 28 eV. When used to analyze the spore of the Pteris vittata L plant, the TES-EDS clearly reveals a different distribution of As and Mg in the micro region of the plant. The TES-EDS with SEM yields detailed information about the distribution of multi-elements in a sample.