A5050569942- Superconducting and THz Device Technology
- Radio Astronomy Observations and Technology
- Calibration and Measurement Techniques
- Astronomy and Astrophysical Research
- Astrophysics and Cosmic Phenomena
- Cosmology and Gravitation Theories
- Dark Matter and Cosmic Phenomena
- Particle Detector Development and Performance
- Precipitation Measurement and Analysis
- Photonic and Optical Devices
- Plasma and Flow Control in Aerodynamics
- Aerodynamics and Acoustics in Jet Flows
- Spacecraft Design and Technology
- Engineering and Test Systems
- Radar Systems and Signal Processing
- Fluid Dynamics and Turbulent Flows
- CCD and CMOS Imaging Sensors
- Advanced Data Storage Technologies
- Solar and Space Plasma Dynamics
- Distributed and Parallel Computing Systems
- Advanced Thermodynamics and Statistical Mechanics
- Optical Coatings and Gratings
- Risk and Safety Analysis
- Astronomical Observations and Instrumentation
- Adaptive optics and wavefront sensing
University of California System
2024
Stockholm University
2024
University of California, Berkeley
2020-2024
High Energy Accelerator Research Organization
2024
Lawrence Berkeley National Laboratory
2022
LiteBIRD is a JAXA-led strategic Large-Class satellite mission designed to measure the polarization of cosmic microwave background and foregrounds from 34 448 GHz across entire sky L2 in late 2020's. The primary focus primordially generated B-mode at large angular scales. Beyond its scientific objective will generate data-set capable probing number inquiries including sum neutrino masses. responsibility United States be fabricate three flight model focal plane units for mission. design...
We developed a broadband two-layer anti-reflection (AR) coating for use on sapphire half-wave plate (HWP) and an alumina infrared (IR) filter the cosmic microwave background (CMB) polarimetry. Measuring faint CMB B-mode signals requires maximizing number of photons reaching detectors minimizing spurious polarization due to reflection with off-axis incident angle. Sapphire have high refractive indices 3.1 are highly reflective without AR coating. This paper presents design, fabrication,...
The Simons Array (SA) project is a ground-based Cosmic Microwave Background (CMB) polarization experiment. SA observes the sky using three telescopes, and POLARBEAR-2A (PB-2A) receiver system on first telescope. For experiment, atmospheric fluctuation primary noise source that could cause leakage. In PB-2A system, continuously rotating half-wave plate (HWP) used to mitigate However, due rapid modulation of signal, uncertainty in time constant detector results an angle. PB-2A, each bolometer...
Cosmic microwave background (CMB) experiments have deployed focal planes with
LiteBIRD, the next-generation cosmic microwave background (CMB) experiment, aims for a launch in Japan's fiscal year 2032, marking major advancement exploration of primordial cosmology and fundamental physics. Orbiting Sun-Earth Lagrangian point L2, this JAXA-led strategic L-class mission will conduct comprehensive mapping CMB polarization across entire sky. During its 3-year mission, LiteBIRD employ three telescopes within 15 unique frequency bands (ranging from 34 through 448 GHz),...
LiteBIRD, a forthcoming JAXA mission, aims to accurately study the microwave sky within 40-400 GHz frequency range divided into 15 distinct nominal bands. The primary objective is constrain CMB inflationary signal, specifically primordial B-modes. LiteBIRD targets B-mode signal on large angular scales, where expected dominate, with goal of reaching tensor-to-scalar ratio sensitivity $\sigma_r\sim0.001$. bands will be split among three telescopes, some overlap between telescopes for better...
Abstract POLARBEAR-2b (PB-2b) is the second receiver in Simons Array, a cosmic microwave background (CMB) polarization experiment. The Array uses dichroic sensitive lenslet-coupled sinuous antennas and transition-edge sensor (TES) bolometers made of superconducting films. These are read out with frequency multiplexing electronics. PB-2b contains $$\sim$$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mo>∼</mml:mo> </mml:math> 7500 detectors two bands at 90 150 GHz arcminute...
LiteBIRD is a JAXA-led strategic large-class satellite mission designed to measure the polarization of cosmic microwave background and Galactic foregrounds from 34 448 GHz across entire sky L2 in late 2020s. The scientific payload includes three telescopes which are called low-, mid-, high-frequency each with their own receiver that covers portion mission's frequency range. low telescope will map synchrotron radiation foreground background. We discuss design, fabrication, characterization...
Abstract Lenslet-coupled antenna arrays have been used in CMB experiments and are the baseline technology for next-generation satellite missions such as LiteBIRD PICO. Lenslets small hemispherical lenses mounted on focal plane that couple light to detectors typically made of silicon or alumina due their high focusing power low absorption loss. To minimize reflection at vacuum-dielectric interface, lenslets require anti-reflection (AR) coatings. Metamaterials large microwave optical...
The Simons Array is an experiment located in the Atacama Desert Chile that will measure polarization anisotropy of Cosmic Microwave Background. It consists three telescopes house receivers POLARBEAR-2A, POLARBEAR-2B and POLARBEAR-2C, which observe CMB at 90, 150, 220 270 GHz with over 22,000 Transition Edge Sensor (TES) bolometers. Each receiver contains a focal plane composed seven hexagonal arrays lenslet-coupled sinuous antenna bolometers, each dichroic pixel containing four TESs. readout...
We developed a broadband two-layer anti-reflection (AR) coating for use on sapphire half-wave plate (HWP) and an alumina infrared (IR) filter the cosmic microwave background (CMB) polarimetry. Measuring faint CMB B-mode signals requires maximizing number of photons reaching detectors minimizing spurious polarization due to reflection with off-axis incident angle. Sapphire have high refractive indices 3.1 are highly reflective without AR coating. This paper presents design, fabrication,...
LiteBIRD is a JAXA-led strategic Large-Class satellite mission designed to measure the polarization of cosmic microwave background and foregrounds from 34 448 GHz across entire sky L2 in late 2020's. The primary focus primordially generated B-mode at large angular scales. Beyond its scientific objective will generate data-set capable probing number inquiries including sum neutrino masses. responsibility United States be fabricate three flight model focal plane units for mission. design...