Performance of TES X-ray microcalorimeters with a novel absorber design

被引：67

作者：

Bandler, S. R. ^{[1
]}

Brekosky, R. P. ^{[1
]}

Brown, A. -D. ^{[1
]}

Chervenak, J. A. ^{[1
]}

Figueroa-Feliciano, E. ^{[2
]}

Finkbeiner, F. M. ^{[1
]}

Iyomoto, N. ^{[1
]}

Kelley, R. L. ^{[1
]}

Kilbourne, C. A. ^{[1
]}

Porter, F. S. ^{[1
]}

Sadleir, J. ^{[1
]}

Smith, S. J. ^{[1
]}

机构：

[1] NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA

[2] MIT, Kavli Inst, Cambridge, MA 02139 USA

来源：

JOURNAL OF LOW TEMPERATURE PHYSICS | 2008年 / 151卷 / 1-2期

关键词：

microcalorimeters; transition edge sensors;

D O I：

10.1007/s10909-007-9673-6

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Superconducting transition-edge sensor (TES) microcalorimeters have demonstrated the Constellation-X requirements for spectral resolution, speed, and pixel size in a close-packed geometry. We will present our recent breakthrough energy resolution with sensors that have all gold and bismuth-gold absorbers. This has been enabled by cantilevered absorbers that make contact to the TES only in regions that are not part of the active thermometer. With this approach, rapid thermalization of the x-ray energy is achieved and interaction between the absorber and TES sensor films is avoided. This design allows us to obtain uniform high performance and is compatible with large-format, high fill-factor arrays. We will discuss this design, the results we have achieved in 8x8 arrays of these pixels, and the dependence of the performance on the geometry of the absorber contact area and on stress within the sensor.

引用

页码：400 / 405

页数：6

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