A multichannel superconducting soft x-ray spectrometer for high-resolution spectroscopy of dilute samples

被引：46

作者：

Friedrich, S

Funk, T

Drury, O

Labov, SE

Cramer, SP

机构：

[1] Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA

[2] Lawrence Livermore Natl Lab, Livermore, CA 94551 USA

[3] Univ Calif Davis, EUIII, Dept Appl Sci, Davis, CA 95616 USA

来源：

REVIEW OF SCIENTIFIC INSTRUMENTS | 2002年 / 73卷 / 03期

关键词：

D O I：

10.1063/1.1445826

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

We have built a high-resolution high-efficiency superconducting soft x-ray spectrometer for synchrotron-based fluorescence-detected absorption spectroscopy. The sensor is a 3x3 array of 200x200 mum(2) superconducting Nb-Al-Al2O3-Al-Nb tunnel junctions with an energy resolution around 15 eV below 1 keV and a total count rate capability of approximate to100 000 counts/s. This sensor array is cooled to approximate to0.1 K by a two-stage adiabatic demagnetization refrigerator while held at the end of a 40-cm-long cold finger that can be inserted into an UHV sample chamber for x-ray fluorescence measurements. We present L-edge absorption spectra of dilute transition metals (approximate tofew 100 ppm) and discuss spectrometer performance with respect to the analysis of metalloproteins. (C) 2002 American Institute of Physics.

引用

页码：1629 / 1631

页数：3

共 7 条

[1] Energy resolution and high count rate performance of superconducting tunnel junction x-ray spectrometers [J].