Effect of Magnetic Fields on TiAu TES Bolometers for the SAFARI Instrument on the SPICA FIR Telescope

Hijmering, R. A.; Khosropanah, P.; Ridder, M.; Lindeman, M. A.; Gottardi, L.; Bruijn, M. P.; Kuur, J. van der; Korte, P. de; Gao, J. R.; Hoevers, H.; Jackson, B. D.

doi:10.1007/s10909-012-0497-7

Cited by 8 publications

(6 citation statements)

References 8 publications

(9 reference statements)

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“…Under ac bias (colored-dotted lines) with the TES in transition we observed a Fraunhofer-like oscillating pattern, typical of a superconducting weak-link structure. Under dc bias (dark line) the current oscillations are generally much smaller and more difficult to see as it was previously reported 12 . Another interesting difference between the ac and dc bias measurement is that at large applied magnetic field the ac current does not decrease as one would expect from the Meissner effect.…”

Section: Resultsmentioning

confidence: 54%

“…The electrical contact to the bolometer is realized by 90nm thick Nb leads deposited on the top of the SiN legs. The sensor was previously characterised under dc bias 11,12 and showed a power plateau of 9.4fW and a dark NEP of 4.8 × 10 −19 W/ √ Hz at 30mK. Below we report the results for the TES ac biased at a frequency of 2.4MHz.…”

Section: Experimental Set-upmentioning

confidence: 96%

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Weak-Link Phenomena in AC-Biased Transition Edge Sensors

et al. 2014

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It has been recently demonstrated that superconducting transition edge sensors (TESs) behave as weak-links due to longitudinally induced superconductivity from the leads with higher Tc. In this work we study the implication of this behaviour for TES-based bolometers and microcalorimeter under ac bias. The TESs are read-out at frequencies between 1 and 5 MHz by a Frequency Domain Multiplexer based on a linearised two-stage SQUID amplifier and high- Q lithographically made superconducting LC resonators. In particular, we focus on SRON TiAu TES bolometers with a measured dark Noise Equivalent Power (NEP) of $3.2 \cdot 10^{-19} W/Hz^{1/2}$ developed for the short wavelength band for the instrument SAFARI on the SPICA telescope.Comment: 6 pages, 5 figur

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Section: Resultsmentioning

confidence: 54%

Section: Experimental Set-upmentioning

confidence: 96%

Weak-Link Phenomena in AC-Biased Transition Edge Sensors

et al. 2014

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“…[78] . 2012年, 荷兰研究人员研制了Ti/Au超导TES探测器, 在85 mK温度下测量NEP达到了5.0×10 −19 W Hz −1/2 左右, 拟应用在SPICA望远镜的SAFARI成像光谱仪上 [79] . 目前国内在超导TES研究方面还处于起步阶段, 中国科学院紫金山天文台、清华大学、中国科学技术大学等单位开展了相关的研究工作.…”

Section: −2009年又进一步将阵元规模扩充到64×256像unclassified

Terahertz single-photon radar detection technology

Luo¹,

Liu²,

Wang³

et al. 2021

Sci. Sin.-Phys. Mech. Astron.

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Terahertz single-photon radar detection technology implements single-photon detection in the terahertz region. It combines the high-resolution characteristics of the terahertz wave and the extreme high detection sensitivity of the single-photon radar. Because the power response threshold is as low as the single-photon level, terahertz single-photon radar has an extremely low noise level with fairly high sensitivity. It is capable of detecting weak signals via the timecorrelated single-photon counting technique, and it is expected to significantly extend the detection range of the current terahertz radar systems. In this paper, we at first reviewed the background of the terahertz single-photon radar detection technology, and expounded its principles, characteristics, and state-of-the-art technologies. We then proposed two typical technical approaches, including the direct detection and heterodyne detection methods, and presented an insight into the design of radar systems. Finally, we analyzed the current key issues in the terahertz single-photon radar detection technology and discussed its potential applications such as the radar range-extending, remote air defense early-warning, and anti-stealth. We believe that the results will provide a feasible technical approach to break through the bottlenecks of the detection capability and detection range of terahertz radar systems. Furthermore, the results would promote the innovation and development of the detection mechanism, methods, systems, and devices employed in terahertz technology. Thus, this study can provide a powerful impetus for the development and application of the terahertz technology, both in military and civilian fields.terahertz, single-photon radar, photon counting

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“…The electrical contact to the bolometer is realized by 90 nm thick Nb wiring on the top of SiN legs. The sensor was previously characterised under dc bias in the set-up described in 5,6 and showed a power plateau of 9.4fW and a dark NEP of 4.8 · 10 −19 W/ √ Hz at 30 mK. The pixel is fabricated on a test chip with 4 other pixels.…”

Section: Singel Pixel Characterization With the Fdm Set-upmentioning

confidence: 99%

“…Here below we present the results of the single pixel characterisation under ac bias of a low-G bolometer developed for Safari. 5,6…”

Section: Introductionmentioning

confidence: 99%

A multiplexer for the AC/DC characterization of TES-based bolometers and microcalorimeters

Gottardi

Akamatsu

Bruijn

et al. 2012

High Energy, Optical, and Infrared Detectors for Astronomy V

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At SRON we are developing the Frequency Domain Multiplexing (FDM) for the read-out of the TES-based detector array for the future infrared and X-ray space mission. We describe the performances of a multiplexer designed to increase the experimental throughput in the characterisation of ultra-low noise equivalent power (NEP) TES bolometers and high energy resolving power X-ray microcalorimeters arrays under ac and dc bias. We discuss the results obtained using the TiAu TES bolometers array fabricated at SRON with measured dark NEP below 5 · 10 −19 W/ √ Hz and saturation power of several fW.

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Effect of Magnetic Fields on TiAu TES Bolometers for the SAFARI Instrument on the SPICA FIR Telescope

Cited by 8 publications

References 8 publications

Weak-Link Phenomena in AC-Biased Transition Edge Sensors

Weak-Link Phenomena in AC-Biased Transition Edge Sensors

Terahertz single-photon radar detection technology

A multiplexer for the AC/DC characterization of TES-based bolometers and microcalorimeters

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