143 citations · 542 across the 15 of their papers we have counts for
17 papers
Effect of Instrumental Polarization with a Half-Wave Plate on the -Mode Signal: Prediction and Correction
Guillaume Patanchon, Hiroaki Imada, Hirokazu Ishino +1
We evaluate the effect of half-wave plate (HWP) imperfections inducing intensity leakage to the measurement of Cosmic Microwave Background (CMB) -mode polarization signal with f…
Tensor-to-scalar ratio forecasts for extended LiteBIRD frequency configurations
U. Fuskeland, J. Aumont, R. Aurlien +114
LiteBIRD is a planned JAXA-led CMB B-mode satellite experiment aiming for launch in the late 2020s, with a primary goal of detecting the imprint of primordial inflationary gravitat…
Probing Cosmic Inflation with the LiteBIRD Cosmic Microwave Background Polarization Survey
LiteBIRD Collaboration, E. Allys, K. Arnold +188
LiteBIRD, the Lite (Light) satellite for the study of B-mode polarization and Inflation from cosmic background Radiation Detection, is a space mission for primordial cosmology and…
Overview of the Medium and High Frequency Telescopes of the LiteBIRD satellite mission
L. Montier, B. Mot, P. de Bernardis +232
LiteBIRD is a JAXA-led Strategic Large-Class mission designed to search for the existence of the primordial gravitational waves produced during the inflationary phase of the Univer…
LiteBIRD: JAXA's new strategic L-class mission for all-sky surveys of cosmic microwave background polarization
M. Hazumi, P. A. R. Ade, A. Adler +233
LiteBIRD, the Lite (Light) satellite for the study of B-mode polarization and Inflation from cosmic background Radiation Detection, is a space mission for primordial cosmology and…
Concept Design of Low Frequency Telescope for CMB B-mode Polarization satellite LiteBIRD
Y. Sekimoto, P. A. R. Ade, A. Adler +232
LiteBIRD has been selected as JAXA's strategic large mission in the 2020s, to observe the cosmic microwave background (CMB) -mode polarization over the full sky at large angular…
The optical design of the LiteBIRD Middle and High Frequency Telescope
L. Lamagna, J. E. Gudmundsson, H. Imada +26
LiteBIRD is a JAXA strategic L-class mission devoted to the measurement of polarization of the Cosmic Microwave Background, searching for the signature of primordial gravitational…
Broadband, millimeter-wave anti-reflective structures on sapphire ablated with femto-second laser
R. Takaku, S. Hanany, H. Imada +13
We designed, fabricated, and measured anti-reflection coating (ARC) on sapphire that has 116% fractional bandwidth and transmission of at least 97% in the millimeter wave band. The…
Analytical expression of aperture efficiency affected by Seidel aberrations
Hiroaki Imada, Makoto Nagai
The effect of aberrations on the aperture efficiency has not been discussed analytically, though aberrations determine the performance of a wide field-of-view system. Expansion of…
Factorization of Antenna Efficiency of Aperture-type antenna: Beam Coupling and Two Spillovers
Makoto Nagai, Hiroaki Imada, Taishi Okumura
Antenna efficiency is one of the most important figures-of-merit of a radio telescope for observations especially at millimeter wavelengths or shorter wavelengths, even for a multi…
Updated design of the CMB polarization experiment satellite LiteBIRD
H. Sugai, P. A. R. Ade, Y. Akiba +216
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 app…
Demonstration of the broadband half-wave plate using the nine-layer sapphire for the CMB polarization experiment
Kunimoto Komatsu, Tomotake Matsumura, Hiroaki Imada +3
We report the development of the achromatic half-wave plate (AHWP) at millimeter wave for cosmic microwave background polarization experiments. We fabricate an AHWP consisting of n…
Comparison of results on from various Planck likelihoods
Sophie Henrot-Versillé, Francois Couchot, Xavier Garrido +4
In this paper, we study the estimation of the effective number of relativistic species from a combination of CMB and BAO data. We vary different ingredients of the analysis: the Pl…
The LiteBIRD Satellite Mission - Sub-Kelvin Instrument
A. Suzuki, P. A. R. Ade, Y. Akiba +149
Inflation is the leading theory of the first instant of the universe. Inflation, which postulates that the universe underwent a period of rapid expansion an instant after its birth…
A wide field-of-view crossed Dragone optical system using the anamorphic aspherical surfaces
Shingo Kashima, Masashi Hazumi, Hiroaki Imada +4
A side-fed crossed Dragone telescope provides a wide field-of-view. This type of a telescope is commonly employed in the measurement of cosmic microwave background (CMB) polarizati…
Broadband Millimeter-Wave Anti-Reflection Coatings on Silicon Using Pyramidal Sub-Wavelength Structures
Karl Young, Qi Wen, Shaul Hanany +5
We used two novel approaches to produce sub-wavelength structure (SWS) anti-reflection coatings (ARC) on silicon for the millimeter and sub-millimeter (MSM) wave band: picosecond l…
Large-scale CO (J=4-3) Mapping toward the Orion-A Giant Molecular Cloud
Shun Ishii, Masumichi Seta, Makoto Nagai +10
We have mapped the Orion-A Giant Molecular Cloud in the CO (J=4-3) line with the Tsukuba 30-cm submillimeter telescope.The map covered a 7.125 deg^2 area with a 9' resolution, incl…