A5023839396- Superconducting and THz Device Technology
- Calibration and Measurement Techniques
- Cosmology and Gravitation Theories
- Radio Astronomy Observations and Technology
- Dark Matter and Cosmic Phenomena
- Acoustic Wave Resonator Technologies
- Spacecraft and Cryogenic Technologies
- Particle physics theoretical and experimental studies
- Thermal Radiation and Cooling Technologies
- Advanced MEMS and NEMS Technologies
- Atomic and Subatomic Physics Research
- Adaptive optics and wavefront sensing
- Astrophysics and Cosmic Phenomena
- Advanced Thermodynamics and Statistical Mechanics
- Spectroscopy and Laser Applications
University of Virginia
2022-2024
Abstract The Simons Observatory (SO) is a cosmic microwave background survey experiment that includes small-aperture telescopes (SATs) observing from an altitude of 5200 m in the Atacama Desert Chile. SO SATs will cover six spectral bands between 27 and 280 GHz to search for primordial B-modes sensitivity σ ( r ) = 0.002, with quantified systematic errors well below this value. Each SAT self-contained cryogenic telescope 35° field view, 42 cm diameter optical aperture, 40 K half-wave plate,...
The QCD axion, originally proposed to solve the strong CP problem in QCD, is a prominent candidate for dark matter (DM). In presence of magnetic fields, such as those around neutron stars, axions can theoretically convert into photons, producing detectable electromagnetic signals. This axion-photon coupling provides unique experimental pathway probe within specific mass range. We investigate novel observational approach using Green Bank Telescope (GBT) search radio transients that could...
The QCD axion and axionlike particles are compelling candidates for galactic dark matter. Theoretically, axions can convert into photons in the presence of a strong external magnetic field, which means it is possible to search them experimentally. One approach use radio telescopes with high-resolution spectrometers look axion-photon conversion magnetospheres neutron stars. In this paper, we describe results obtained using novel where used Green Bank Telescope (GBT) transients produced by...
The Simons Observatory (SO) is a cosmic microwave background (CMB) survey experiment that includes small-aperture telescopes (SATs) observing from an altitude of 5,200 m in the Atacama Desert Chile. SO SATs will cover six spectral bands between 27 and 280 GHz to search for primordial B-modes sensitivity $\sigma(r)=0.002$, with quantified systematic errors well below this value. Each SAT self-contained cryogenic telescope 35$^\circ$ field view, 42 cm diameter optical aperture, 40 K half-wave...
We present the design and measured performance of a new carbon fiber strut that is used in cryogenically cooled truss for Simons Observatory small aperture telescope. The consists two aluminum 6061 rings separated by 24 struts. Each central tube fitted with end caps. tested (i) cycling destructively pull-testing samples, (ii) non-destructively final truss, (iii) measuring thermal conductivity tubes. found strength limited mounting fasteners caps, not epoxy adhesive or tube. This result...
We present the design and measured performance of a light emitting diode (LED) module for spatially mapping kinetic inductance detector (KID) arrays in laboratory. Our novel approach uses multiplexing scheme that only requires seven wires to control 480 red LEDs, number LEDs can be scaled up without adding any additional wires. This relies on active surface mount components operate at cryogenic temperatures down 10 K. Cryogenic tests liquid nitrogen inside our cryostat demonstrate...
We present the design and measured performance of a light emitting diode (LED) module for spatially mapping kinetic inductance detector (KID) arrays in laboratory. Our novel approach uses multiplexing scheme that only requires seven wires to control 480 red LEDs, number LEDs can be scaled up without adding any additional wires. This relies on active surface mount components operate at cryogenic temperatures down 10 K. Cryogenic tests liquid nitrogen inside our cryostat demonstrate...