Thermal Properties of Silicon Nitride Beams Below 1 Kelvin

Wang, G.; Yefremenko, V.; Novosad, V.; Datesman, A.; Pearson, John; Shustakova, G. V.; Divan, Ralu; Chang, C. L.; McMahon, Jeff; Bleem, Lindsey; Crites, A. T.; Downes, T. P.; Mehl, J.; Meyer, S. S.; Carlstrom, J. E.

doi:10.1063/1.3402336

Cited by 3 publications

(3 citation statements)

References 16 publications

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“…The expected temperature rise in the gold devices given by literature values of gold and SiN heat capacities is within a factor two of the measured temperature rise, which is reasonable given the uncertainties in the heat capacities of our SiN and gold. The expected temperature rise from the tantalum device is a factor of ten smaller than expected assuming the classical Debye phonon heat capacity for tantalum and typical heat capacities for SiN [14]. There are a number of possible reasons for this discrepancy.…”

mentioning

confidence: 88%

X-ray photon detection using superconducting resonators in thermal quasi-equilibrium

Quaranta

Cecil

Gades

et al. 2013

Supercond. Sci. Technol.

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Superconducting resonators have to date been used for photon detection in a non-equilibrium manner. In this paper, we demonstrate that such devices can also be used in a thermal quasiequilibrium manner to detect X-ray photons. We have used a resonator to measure the temperature rise induced by an X-ray photon absorbed in normal metal and superconducting absorbers on continuous and perforated silicon nitride membranes. We observed two distinct pulses with vastly different decay times. We attribute the shorter pulses to non-equilibrium quasiparticle relaxation and the longer pulses to a thermal relaxation process. In addition, we have measured the temperature dependence of the X-ray induced temperature rise and decay times. Finally, we have measured the resonator sensitivity and energy resolution. Superconducting resonators used in a thermal quasi-equilibrium manner have the potential to be used for X-ray microcalorimetry. a Electronic address: oquaranta@aps.anl.gov b Electronic address: amiceli@aps.anl.gov 1

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mentioning

confidence: 88%

X-ray photon detection using superconducting resonators in thermal quasi-equilibrium

Quaranta

Cecil

Gades

et al. 2013

Supercond. Sci. Technol.

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“…This gives an expected heat capacity of 0.06 pJ/K, after accounting for both the dielectric (LSN and ILD) and metal (Nb and Al) layers. [71][72][73] The heat capacity is set by island volume of about 30 000 μm 3 , which is much larger than the combined volume of the bolometer legs of about 5000 μm 3 for the longest leg bolometer. As a result, we expect that all the devices would have the same the heat capacity.…”

Section: Detector Fabricationmentioning

confidence: 99%

Thermal kinetic inductance detectors for millimeter-wave detection

Wandui

Bock

Frez

et al. 2020

Journal of Applied Physics

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Thermal Kinetic-Inductance Detectors (TKIDs) combine the excellent noise performance of traditional bolometers with a radio frequency multiplexing architecture that enables the large detector counts needed for the next generation of millimeter-wave instruments. In this paper, we first discuss the expected noise sources in TKIDs and derive the limits where the phonon noise contribution dominates over the other detector noise terms: generation-recombination, amplifier, and two-level system noise. Second, we characterize aluminum TKIDs in a dark environment. We present measurements of TKID resonators with quality factors of about 10 5 at 80 mK. We also discuss the bolometer thermal conductance, heat capacity, and time constants. These were measured by the use of a resistor on the thermal island to excite the bolometers. These dark aluminum TKIDs demonstrate a noise equivalent power, NEP = 2 Â 10 À17 W= ffiffiffiffiffiffi Hz p , with a 1=f knee at 0.1 Hz, which provides background noise limited performance for ground-based telescopes observing at 150 GHz.

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“…We fixed the island size to ∼100 µm by ∼500 µm for all the devices. The expected heat capacity is 0.059 pJ/K, accounting for the dielectric (LSN and ILD) and metal (Nb and Al) layers [24][25][26] . The heat capacity is set by island volume of about 30,000 µm 3 , which is much larger than the combined volume of the bolometer legs of about 5,000 µm 3 for the longest leg bolometer.…”

Section: Detector Fabricationmentioning

confidence: 99%

Thermal Kinetic Inductance Detectors for millimeter-wave detection

Wandui,

Bock,

Frez

et al. 2020

Preprint

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Thermal Kinetic Inductance Detectors (TKIDs) combine the excellent noise performance of traditional bolometers with a radio frequency (RF) multiplexing architecture that enables the large detector counts needed for the next generation of millimeter wave instruments. Here we present dark prototype TKID pixels that demonstrate a noise equivalent power NEP = 2 × 10 −17 W/ √ Hz with a 1/ f knee at 0.1 Hz, suitable for background-limited noise performance at 150 GHz from a ground-based site. We discuss the optimizations in the device design and fabrication techniques to realize optimal electrical performance and high quality factors at a bath temperature of 250 mK.

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Thermal Properties of Silicon Nitride Beams Below 1 Kelvin

Cited by 3 publications

References 16 publications

X-ray photon detection using superconducting resonators in thermal quasi-equilibrium

X-ray photon detection using superconducting resonators in thermal quasi-equilibrium

Thermal kinetic inductance detectors for millimeter-wave detection

Thermal Kinetic Inductance Detectors for millimeter-wave detection

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