30 Result(s)
within
J.R. Gao
Characterization and Evaluation of Materials
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Article
Developments on Frequency Domain Multiplexing Readout for Large Arrays of Transition-Edge Sensor X-ray Micro-calorimeters
At SRON, we have been develo** X-ray TES micro-calorimeters as backup technology for the X-ray Integral Field Unit (X-IFU) of the Athena mission, demonstrating excellent resolving powers both under DC and AC...
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Article
System Performance of a TDM Test-Bed with Long Flex Harness Toward the New X-IFU FPA-DM
SRON (Netherlands Institute for Space Research) is develo** the focal plane assembly (FPA) for Athena X-IFU, whose demonstration model (DM) will use for the first time a time domain multiplexing (TDM)-based ...
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Article
Sensitivity Modeling for LiteBIRD
LiteBIRD is a future satellite mission designed to observe the polarization of the cosmic microwave background radiation in order to probe the inflationary universe. LiteBIRD is set to observe the sky using three...
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Article
Lateral Inverse Proximity Effect in Ti/Au Transition Edge Sensors
We report measured \(T_\mathrm{c}\) T c ...
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Article
Susceptibility Study of TES Micro-calorimeters for X-ray Spectroscopy Under FDM Readout
We present a characterization of the sensitivity of TES X-ray micro-calorimeters to environmental conditions under frequency-domain multiplexing (FDM) readout. In the FDM scheme, each TES in a readout chain is...
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Article
Open AccessSmall Size Transition-Edge Sensors for Future X-Ray Applications
Large arrays of transition edge sensors (TESs) are the baseline for a number of future space observatories. For instance, the X-ray integral field unit (X-IFU) instrument on board the ATHENA space telescope wi...
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Article
Optical Characterization of OMT-Coupled TES Bolometers for LiteBIRD
Feedhorn- and orthomode transducer- (OMT) coupled transition edge sensor (TES) bolometers have been designed and micro-fabricated to meet the optical specifications of the LiteBIRD high frequency telescope (HF...
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Article
Open AccessUpdated Design of the CMB Polarization Experiment Satellite LiteBIRD
Recent developments of transition-edge sensors (TESs), based on extensive experience in ground-based experiments, have been making the sensor techniques mature enough for their application on future satellite ...
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Article
Development of a Ti/Au TES Microcalorimeter Array as a Backup Sensor for the Athena/X-IFU Instrument
We are develo** a transition edge sensor (TES) microcalorimeter array based on a Ti/Au superconducting bilayer, as a backup option for the X-IFU instrument on the Athena X-ray observatory. The array is read ...
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Article
Study of TES Detector Transition Curve to Optimize the Pixel Design for Frequency-Division Multiplexing Readout
Superconducting transition-edge sensors (TESs) are highly sensitive detectors. Based on the outstanding performance on spectral resolution, the X-ray integral field unit (X-IFU) instrument on-board athena will...
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Article
AC/DC Characterization of a Ti/Au TES with Au/Bi Absorber for X-ray Detection
Transition-edge sensors (TESs) are used as very sensitive thermometers in microcalorimeters aimed at detection of different wavelengths. In particular, for soft X-ray astrophysics, science goals require very h...
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Article
Characterization of High Aspect-Ratio TiAu TES X-ray Microcalorimeter Array Under AC Bias
We are develo** X-ray microcalorimeters as a backup option for the baseline detectors in the X-IFU instrument on board the ATHENA space mission led by ESA and to be launched in the early 2030s. 5 \(\times \)× 5...
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Article
Josephson Effects in Frequency-Domain Multiplexed TES Microcalorimeters and Bolometers
Frequency-division multiplexing is the baseline read-out system for large arrays of superconducting transition-edge sensors (TES’s) under development for the X-ray and infrared instruments like X-IFU (Athena) ...
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Article
Development of Ultra-Low-Noise TES Bolometer Arrays
SRON is develo** ultra-low-noise transition edge sensors (TESs) based on a superconducting Ti/Au bilayer on a suspended SiN island with SiN legs for SAFARI aboard SPICA. We have two major concerns about real...
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Article
TES-Based X-ray Microcalorimeter Performances Under AC Bias and FDM for Athena
Athena is a European X-ray observatory, scheduled for launch in \(\sim \) ...
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Article
Fabrication of Low-Noise TES Arrays for the SAFARI Instrument on SPICA
Ultra-low-noise transition edge sensors (TES) with noise equivalent power lower than 2 \(\times \) ...
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Article
Measurements of the Optical Performance of Prototype TES Bolometers for SAFARI
We have measured the optical response of prototype detectors for SAFARI, the far-infrared imaging spectrometer for the SPICA satellite. SAFARI’s three bolometer arrays, coupled with a Fourier transform spectro...
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Article
Comparison of the Effects of Magnetic Field on Low Noise MoAu and TiAu TES Bolometers
Recently we have reported on the effects of magnetic field on our low noise (NEP = 4 \(\times 10^{-19}\) ...
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Article
Low-Bandwidth Operation of TES-Based Bolometer Operation in a Resistance Locked Loop
Operation of TES-based bolometers in a resistance locked loop (RLL), i.e. kee** the operating resistance constant by means of feedback on the bias voltage, provides a number of attractive properties for appl...
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Article
Characterization of Low Noise TES Detectors Fabricated by D-RIE Process for SAFARI Short-Wavelength Band
SRON is develo** TES detectors based on a superconducting Ti/Au bilayer on a suspended SiN membrane for the short-wavelength band of the SAFARI instrument on SPICA mission. We have recently replaced the wet ...
