Small Pitch Transition-Edge Sensors with Broadband High Spectral Resolution for Solar Physics

Smith, S. J.; Adams, J. S.; Bailey, C. N.; Bandler, S. R.; Chervenak, James A.; Eckart, Megan E.; Finkbeiner, F. M.; Kelley, R. L.; Kilbourne, C. A.; Porter, F. S.; Sadleir, J. E.

doi:10.1007/s10909-012-0574-y

Cited by 68 publications

(58 citation statements)

References 18 publications

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“…By making these contact points small, the effects of athermal energy loss were minimized. 10 It was found that, for this geometry, the energy resolution degraded as the area of contact of the "stem contact" increased. The detector geometry with the smallest contact area between absorber and solid substrate was not only fast, but also demonstrated the best energy resolution seen by any low-temperature detector at 6 keV of 1.6 eV full width at half maximum (FWHM).…”

Section: Introductionmentioning

confidence: 93%

“…The energy loss from a thin film is given by the expression (10). If the source of x-rays is monoenergetic at a photon energy E 0 , then the lineshape is determined by the coordinate-dependent part of E loss (z 0 ).…”

Section: Modeling Spectral Lineshape In Mo/au Sensor For Mn K α Comentioning

confidence: 99%

“…The detector geometry with the smallest contact area between absorber and solid substrate was not only fast, but also demonstrated the best energy resolution seen by any low-temperature detector at 6 keV of 1.6 eV full width at half maximum (FWHM). 10 In similar devices where the absorber was twice as thick, the dependence of energy resolution on contact area was not apparent. Thus there was strong evidence for the energy resolution of this type of detector being highly dependent on the amount of athermal phonon loss, which is very geometry dependent.…”

Section: Introductionmentioning

confidence: 99%

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Athermal energy loss from x-rays deposited in thin superconducting films on solid substrates

et al. 2013

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When energy is deposited in a thin-film cryogenic detector, such as from the absorption of an x-ray, an important feature that determines the energy resolution is the amount of athermal energy that can be lost to the heat bath prior to the elementary excitation systems coming into thermal equilibrium. This form of energy loss will be position dependent and therefore can limit the detector energy resolution. An understanding of the physical processes that occur when elementary excitations are generated in metal films on dielectric substrates is important for the design and optimization of a number of different types of low-temperature detectors. We have measured the total energy loss in one relatively simple geometry that allows us to study these processes and compare measurements with calculation based upon a model for the various different processes. We have modeled the athermal phonon energy loss in this device by finding an evolving phonon distribution function that solves the system of kinetic equations for the interacting system of electrons and phonons. Using measurements of device parameters such as the Debye energy and the thermal diffusivity we have calculated the expected energy loss from this detector geometry, and also the position-dependent variation of this loss. We have also calculated the predicted impact on measured spectral lineshapes and have shown that they agree well with measurements. In addition, we have tested this model by using it to predict the performance of a number of other types of detector with different geometries, where good agreement is also found.

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Section: Introductionmentioning

confidence: 93%

Section: Modeling Spectral Lineshape In Mo/au Sensor For Mn K α Comentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Athermal energy loss from x-rays deposited in thin superconducting films on solid substrates

et al. 2013

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“…For example, state-of-the-art TES X-ray detectors achieve an energy resolution of 1.58 eV FWHM at 5.9 keV [1]. Since TES are thermal detectors, they are in principle very broadband.…”

Section: Introductionmentioning

confidence: 99%

Adjustable SQUID-resonator direct coupling in microwave SQUID multiplexer for TES microcalorimeter array

Nakashima

Hirayama

Kohjiro

et al. 2017

IEICE Electron. Express

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Abstract:We have succeeded in the first demonstration of a simple and accurate resonator-superconducting quantum interference device (SQUID) coupling for microwave SQUID multiplexers. A simple theory shows our direct coupling with adjustable fractional inductance in the SQUID loop can decrease the deviation of resonance frequencies from designed values in contrast to a conventional inductive coupling. Our direct coupling provides the individual coupling that can be optimized with keeping identical structure, shape, and dimension of the SQUID among all pixels on the same chip. It covers experimentally three or potentially more factors of a frequency band that is larger than that of cryogenic high electron mobility transistor amplifiers. The deviation of experimental fractional inductance from the designed one is less than −3/+10%.

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“…These devices [5][6][7][8] are made of square Mo(45 nm)/Au(200 nm) bilayers (Fig. 1a) and have transition temperatures of ∼100 mK.…”

Section: Introductionmentioning

confidence: 99%

Implications of Weak Link Effects on Thermal Characteristics of Transition-Edge Sensors

et al. 2012

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2: Implications of weak link effects on thermal characteristics of transition-edge sensors Weak link behavior in transition-edge sensor (TES) devices creates the need for a more careful characterization of a device's thermal characteristics through its transition. This is particularly true for small TESs where a small change in the measurement current results in large changes in temperature. A highly current-dependent transition shape makes accurate thermal characterization of the TES parameters through the transition challenging. To accurately interpret measurements, especially complex impedance, it is crucial to know the temperature-dependent thermal conductance, G(T), and heat capacity, C(T), at each point through the transition. We will present data illustrating these effects and discuss how we overcome the challenges that are present in accurately determining G and T from IV curves. We will also show how these weak link effects vary with TES size.https://ntrs.nasa.gov/search.jsp?R=20110013025 2018-05-11T09:57:01+00:00Z

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Small Pitch Transition-Edge Sensors with Broadband High Spectral Resolution for Solar Physics

Cited by 68 publications

References 18 publications

Athermal energy loss from x-rays deposited in thin superconducting films on solid substrates

Athermal energy loss from x-rays deposited in thin superconducting films on solid substrates

Adjustable SQUID-resonator direct coupling in microwave SQUID multiplexer for TES microcalorimeter array

Implications of Weak Link Effects on Thermal Characteristics of Transition-Edge Sensors

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