Effects of Normal Metal Features on Superconducting Transition-Edge Sensors

被引：21
|
作者：
Wakeham, N. A. [1 ,2 ]
Adams, J. S. [1 ,3 ]
Bandler, S. R. [1 ]
Chervenak, J. A. [1 ]
Datesman, A. M. [1 ,4 ]
Eckart, M. E. [1 ]
Finkbeiner, F. M. [1 ,5 ]
Kelley, R. L. [1 ]
Kilbourne, C. A. [1 ]
Miniussi, A. R. [1 ,3 ]
Porter, F. S. [1 ]
Sadleir, J. E. [1 ]
Sakai, K. [1 ,3 ]
Smith, S. J. [1 ,3 ]
Wassell, E. J. [1 ,4 ]
Yoon, W. [1 ,2 ]
机构：
[1] NASA, GSFC, Greenbelt, MD 20771 USA
[2] Univ Space Res Assoc, NPP, 7178 Columbia Gateway Dr, Columbia, MD 21046 USA
[3] Univ Maryland Baltimore Cty, CRESST II, 1000 Hilltop Cir, Baltimore, MD 21250 USA
[4] SGT Inc, 7701 Greenbelt Rd, Greenbelt, MD 20770 USA
[5] Wyle Informat Syst, 22309 Explorat Dr, Lexington Pk, MD 20653 USA
来源：
JOURNAL OF LOW TEMPERATURE PHYSICS | 2018年 / 193卷 / 3-4期
关键词：
Transition-edge sensor; X-IFU; X-ray microcalorimeter; NOISE; REDUCTION;
D O I：
10.1007/s10909-018-1898-z
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
In transition-edge sensors (TESs), the addition of normal metal stripes on top of the superconducting bilayer, perpendicular to the current direction, is known to globally alter the sensitivity of the resistance R to changes in temperature T and current I. Here, we describe measurements of the dependence of the TES current on magnetic field B, bath temperature and voltage bias in devices with various numbers of stripes. We show that the normal metal features have a profound effect on the appearance of localized regions of very large TESs with no stripes are found to have a relatively smooth resistive transition and sufficiently low noise that the measured energy resolution is 1.6eV for X-rays of 1.5keV. The predicted energy resolution at 6keV is better than 2eV, once the heat capacity is optimized for these higher energies.
引用
收藏
页码：231 / 240
页数：10
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