A5029593210- Superconducting and THz Device Technology
- Stellar, planetary, and galactic studies
- Adaptive optics and wavefront sensing
- Physics of Superconductivity and Magnetism
- Astronomy and Astrophysical Research
- Calibration and Measurement Techniques
- Advanced Frequency and Time Standards
- Thermal Radiation and Cooling Technologies
- CCD and CMOS Imaging Sensors
- Superconducting Materials and Applications
- Astrophysics and Star Formation Studies
- Dark Matter and Cosmic Phenomena
- Superconductivity in MgB2 and Alloys
- Radio Frequency Integrated Circuit Design
- Scientific Research and Discoveries
- Particle Detector Development and Performance
- Astronomical Observations and Instrumentation
- Optical Systems and Laser Technology
- Sensor Technology and Measurement Systems
- Soil Moisture and Remote Sensing
- Gamma-ray bursts and supernovae
- Galaxies: Formation, Evolution, Phenomena
- Terahertz technology and applications
- Geological and Geochemical Analysis
- Geomagnetism and Paleomagnetism Studies
University of California, Santa Barbara
2019-2024
We present the MKID Exoplanet Camera (MEC), a z through J band (800–1400 nm) integral field spectrograph located behind The Subaru Coronagraphic Extreme Adaptive Optics (SCExAO) at Telescope on Maunakea that utilizes Microwave Kinetic Inductance Detectors (MKIDs) as enabling technology for high contrast imaging. MEC is first permanently deployed near-infrared instrument and designed to operate both an IFU, focal plane wavefront sensor in multi-kHz feedback loop with SCExAO. read noise free,...
Microwave kinetic inductance detectors (MKIDs) sensitive to light in the ultraviolet near-infrared wavelengths are superconducting microresonators that capable of measuring photon arrival times microsecond precision and estimating each photon's energy. The resolving power nonmembrane MKIDs has remained stubbornly around 10 at 1 μm despite significant improvements system noise. Here we show can be roughly doubled with a simple bilayer design without needing place device on membrane, avoiding...
Abstract We report the direct imaging discovery of a low-mass companion to nearby accelerating A star, HIP 109427, with Subaru Coronagraphic Extreme Adaptive Optics (SCExAO) instrument coupled Microwave Kinetic Inductance Detector Exoplanet Camera (MEC) and CHARIS integral field spectrograph. data reduced reference star point spread function (PSF) subtraction yield 1.1–2.4 μ m spectra. MEC reveals in Y J band at comparable signal-to-noise ratio using stochastic speckle discrimination, no PSF...
We report on the design and performance of Microwave Kinetic Inductance Detectors (MKIDs) sensitive to single photons in optical near-infrared range using hafnium as sensor material. Our test device had a superconducting transition temperature 395 mK room normal state resistivity 97 $\mu \Omega$ cm with an RRR = 1.6. Resonators displayed internal quality factors around 200,000. Similar analysis MKIDs made from other highly resistive superconductors, we find that modeling response detector...
Superconducting electronics often require high-density microwave interconnects capable of transporting signals between temperature stages with minimal loss, cross talk, and heat conduction. We report the design fabrication superconducting 53 wt% Nb-47 Ti (Nb47Ti) FLexible coAXial ribbon cables (FLAX). The ten traces each consist a 0.076 mm O.D. NbTi inner conductor insulated PFA (0.28 O.D.) sheathed in shared 0.025 thick Nb47Ti outer conductor. cable is terminated G3PO coaxial push-on...
We present the direct imaging discovery of a low-mass companion to nearby accelerating F star, HIP 5319, using SCExAO coupled with CHARIS, VAMPIRES, and MEC instruments in addition Keck/NIRC2 imaging. CHARIS $JHK$ (1.1-2.4 $\mu$m) spectroscopic data combined VAMPIRES 750 nm, $Y$, NIRC2 $L_{\rm p}$ photometry is best matched by an M3--M7 object effective temperature T=3200 K surface gravity log($g$)=5.5. Using relative astrometry for 5319 B from absolute primary $Gaia$ $Hipparcos$ adopting...
MagAO-X is the coronagraphic extreme adaptive optics system for 6.5m Magellan Clay Telescope. We report results of commissioning first phase MagAO-X. Components now available routine observations include: >2kHz high-order control loop consisting a 97 actuator woofer deformable mirror (DM), 2040 tweeter DM, and modulated pyramid wavefront sensor (WFS); classical Lyot coronagraphs with integrated low-order (LO) WFS using third 97-actuator non-common path correcting (NCPC) DM; broad band...
We present an empirical measurement of the dark count rate seen in a large-format MKID array identical to those currently use at observatories such as Subaru on Maunakea. This work provides compelling evidence for their utility future experiments that require low-count rate, quiet environments matter direct detection. Across bandpass from 0.946-1.534 eV (1310-808 nm) average $(1.847\pm0.003)\times10^{-3}$ photons/pixel/s is measured. Breaking this into 5 equal-energy bins based resolving...
Abstract We present an experimental study of photon statistics for high-contrast imaging with the Microwave Kinetic Inductance Detector (MKID) Exoplanet Camera (MEC) located behind Subaru Coronagraphic Extreme Adaptive Optics System at Telescope. show that MEC measures expected distributions both on-axis companion intensity and off-axis intensity, which manifests as quasi-static speckles in image plane currently limits performance. These can be probed by any observation due to...
Hafnium is an elemental superconductor which crystallizes in a hexagonal close packed structure, has transition temperature $T_{C} \simeq 400 mK$, and high normal state resistivity around $90 \mu \Omega. cm$. In Microwave Kinetic Inductance Detectors (MKIDs), these properties are advantageous since they allow for creating detectors sensitive to optical near infra-red radiation. this work, we study how sputter conditions especially the power applied target during deposition, affect hafnium...
Optical and near-IR Microwave Kinetic Inductance Detectors, or MKIDs, are superconducting photon counting detectors capable of measuring the energy arrival time individual OIR photons without read noise dark current. In this whitepaper we will discuss current status MKIDs MKID-based instruments.
Abstract We present the Microwave Kinetic Inductance Detector (MKID) Pipeline, which is a general use science data pipeline for reduction and analysis of ultraviolet, optical, infrared MKID sets. This paper provides an introduction to nature sets, it gives overview calibration steps that are included in pipeline, introduces implementation software.
MagAO-X is the coronagraphic extreme adaptive optics system for 6.5 m Magellan Clay Telescope. We report results of commissioning first phase MagAO-X. Components now available routine observations include: >2 kHz high-order control loop consisting a 97 actuator woofer deformable mirror (DM), 2040 tweeter DM, and modulated pyramid wavefront sensor (WFS); classical Lyot coronagraphs with integrated low-order (LO) WFS using third 97-actuator non-common path correcting (NCPC) DM; broad band...
We develop a simple coordinate transformation that can be employed to compensate for the nonlinearity introduced by microwave kinetic inductance detector's (MKID) homodyne readout scheme. This system is compared canonically used polar coordinates and shown improve performance of filtering method often estimate photon's energy. For detector where primarily responsible limiting its resolving power, this technique leads increased dynamic range, which we show applying data from hafnium MKID...
The Planetary Imaging Concept Testbed Using a Recoverable Experiment-Coronagraph (PICTURE-C) experiment is balloon-borne observatory for high-contrast imaging of debris disks and exoplanets around nearby stars. This will use 10,000-pixel Microwave Kinetic Inductance Detector (MKID) instrument as its science camera. PICTURE-C MKID Camera an integral field spectrograph (IFS) with bandpass λ = 540 − 660 nm that sits behind modest adaptive optics system coronagraph which promise to...
We present an empirical measurement of the dark count rate seen in a large-format MKID array identical to those currently use at observatories such as Subaru on Maunakea. This work provides compelling evidence for their utility future experiments that require low-count rate, quiet environments matter direct detection. Across bandpass from 0.946-1.534 eV (1310-808 nm) average $(1.847\pm0.003)\times10^{-3}$ photons/pixel/s is measured. Breaking this into 5 equal-energy bins based resolving...
The upcoming Extremely Large Telescopes have the angular resolution and light collecting area that is necessary to observe biosignatures in atmospheres of Earth-like planets. High-contrast imaging instruments will play a large role this because observing planets directly overcomes many observational limitations other exoplanet detection techniques. influence bright star can be significantly reduced by spatially resolving dim planet, allowing characterization planet its atmosphere. However,...
We present The MKID Pipeline, a general use science data pipeline for the reduction and analysis of ultraviolet, optical infrared (UVOIR) Microwave Kinetic Inductance Detector (MKID) sets. This paper provides an introduction to nature sets, overview calibration steps included in pipeline, implementation software.
MagAO-X is a visible to near-IR AO system that will enable suite of instruments perform high-contrast, high-resolution science. During its "Phase II" plan 10-kilopixel Microwave Kinetic Inductance Detector (MKID) IFU be deployed as science camera behind MagAO-X. MKIDs are photon-counting detectors with energy resolution up 30. The photon counting capability and readout allow for microsecond time no associated read noise. As consequence the high rate MKID can used Focal Plane Wavefront Sensor...
We present the direct imaging discovery of a low-mass companion to nearby accelerating F star, HIP 5319, using SCExAO coupled with CHARIS, VAMPIRES, and MEC instruments in addition Keck/NIRC2 imaging. CHARIS $JHK$ (1.1-2.4 $μ$m) spectroscopic data combined VAMPIRES 750 nm, $Y$, NIRC2 $L_{\rm p}$ photometry is best matched by an M3--M7 object effective temperature T=3200 K surface gravity log($g$)=5.5. Using relative astrometry for 5319 B from absolute primary $Gaia$ $Hipparcos$ adopting...
We present an experimental study of photon statistics for high-contrast imaging with the Microwave Kinetic Inductance Detector (MKID) Exoplanet Camera (MEC) located behind Subaru Coronagraphic Extreme Adaptive Optics System (SCExAO) at Telescope. show that MEC measures expected distributions both on-axis companion intensity and off-axis which manifests as quasi-static speckles in image plane currently limits performance. These can be probed by any observation due to photon-counting...