M. Zannoni
A5059812456- Radio Astronomy Observations and Technology
- Superconducting and THz Device Technology
- Cosmology and Gravitation Theories
- Astrophysics and Cosmic Phenomena
- Geophysics and Gravity Measurements
- Dark Matter and Cosmic Phenomena
- Solar and Space Plasma Dynamics
- Astronomy and Astrophysical Research
- Galaxies: Formation, Evolution, Phenomena
- Physics of Superconductivity and Magnetism
- Astronomical Observations and Instrumentation
- Advanced Thermodynamic Systems and Engines
- Microwave Engineering and Waveguides
- Geomagnetism and Paleomagnetism Studies
- Spacecraft and Cryogenic Technologies
- Astro and Planetary Science
- Adaptive optics and wavefront sensing
- Radio Frequency Integrated Circuit Design
- Stellar, planetary, and galactic studies
- Advanced Frequency and Time Standards
- Spacecraft Design and Technology
- Scientific Research and Discoveries
- Atmospheric Ozone and Climate
- Cold Atom Physics and Bose-Einstein Condensates
- Calibration and Measurement Techniques
University of Milano-Bicocca
2016-2025
Istituto Nazionale di Fisica Nucleare, Sezione di Milano Bicocca
2016-2024
The University of Tokyo
2020-2024
High Energy Accelerator Research Organization
2018-2024
University of Milan
2006-2023
Istituto Nazionale di Fisica Nucleare
2011-2023
Campbell Collaboration
2023
University of Bologna
2018-2023
Centre National de la Recherche Scientifique
2018-2022
Université Paris Cité
2018-2022
Abstract The Year of Polar Prediction in the Southern Hemisphere (YOPP-SH) had a special observing period (SOP) that ran from 16 November 2018 to 15 February 2019, chosen span austral warm season months greatest operational activity Antarctic. Some 2,200 additional radiosondes were launched during 3-month SOP, roughly doubling routine program, and network drifting buoys Ocean was enhanced. An evaluation global model forecasts SOP using its data has confirmed extratropical forecast skill lags...
The Q $\&$ U Bolometric Interferometer for Cosmology (QUBIC) is a novel kind of polarimeter optimized the measurement B-mode polarization Cosmic Microwave Background (CMB), which one major challenges observational cosmology. signal expected to be order few tens nK, prone instrumental systematic effects and polluted by various astrophysical foregrounds can only controlled through multichroic observations. QUBIC designed address these issues with approach that combines advantages...
We describe a space-borne, multi-band, multi-beam polarimeter aiming at precise and accurate measurement of the polarization Cosmic Microwave Background. The instrument is optimized to be compatible with strict budget requirements medium-size space mission within Vision Programme European Space Agency. has no moving parts, uses arrays diffraction-limited Kinetic Inductance Detectors cover frequency range from 60 GHz 600 in 19 wide bands, focal plane 1.2 m aperture telescope cooled 40 K,...
The LSPE is a balloon-borne mission aimed at measuring the polarization of Cosmic Microwave Background (CMB) large angular scales, and in particular to constrain curl component CMB (B-modes) produced by tensor perturbations generated during cosmic inflation, very early universe. Its primary target improve limit on ratio scalar amplitudes down r = 0.03, 99.7% confidence. A second produce wide maps foreground our Galaxy synchrotron emission interstellar dust emission. These will be important...
Abstract The cosmic rays propagation inside the heliosphere is well described by a transport equation introduced Parker in 1965. To solve this equation, several approaches were followed past. Recently, Monte Carlo approach became widely used force of its advantages with respect to other numerical methods. In associated fully equivalent set stochastic differential equations (SDE). This describe path quasi‐particle from source, e.g., interstellar space, specific target, detector at Earth. We...
Abstract We quantify the calibration requirements for systematic uncertainties next-generation ground-based observatories targeting large-angle B-mode polarization of Cosmic Microwave Background, with a focus on Simons Observatory (SO). explore gain calibration, bandpass center frequencies, and angles, including frequency variation latter across bandpass. find that frequencies must be known to percent levels or less avoid biases tensor-to-scalar ratio r order Δ r∼10 -3 , in line previous...
Abstract We present a demonstration of the in-flight polarization angle calibration for JAXA/ISAS second strategic large class mission, LiteBIRD , and estimate its impact on measurement tensor-to-scalar ratio parameter, r using simulated data. generate set sky maps with CMB polarized foreground emission, inject instrumental noise offsets to 22 (partially overlapping) frequency channels. Our relies nulling EB cross correlation signal in each channel. This step has been carried out by two...
This paper aims to describe the Pointing Reconstruction Model (PRM) and prototype Star Tracker, which will be mounted on LSPE-Strip, a microwave Q- W-band CMB telescope planned for installation at "Observatorio del Teide" in Tenerife. The PRM integrates information instantaneous attitude provided by control system determine actual pointing direction focal plane orientation of telescope. It accounts various non-idealities setup, represented eight configuration angles, calibrated using...
This paper presents the outcomes of a feasibility study on manufacturing D-band horn antennas through Low Power Bed Fusion process. Different prototypes have been realized and tested, showing nice results in terms co-polarization component. On other hand, spurious cross-polarization component is present radiation pattern even principal planes, limiting device to single-polarization applications. A mechanical devices has conducted internal channel understand reasons for this issue, and,...
The Simons Observatory (SO) is a ground-based cosmic microwave background (CMB) survey experiment that currently consists of three 0.42m small-aperture telescopes (SATs) and one 6m large-aperture telescope (LAT), located at an elevation 5200m in the Atacama Desert Chile. At LAT's focal plane, SO will install >62,000 transition-edge sensor detectors across 13 optics tubes (OTs) within Large Aperture Telescope Receiver (LATR), largest cryogenic camera ever built to observe CMB. Here we report...
Current- and next-generation Cosmic Microwave Background (CMB) experiments will measure polarization anisotropies with unprecedented sensitivities. The need for high precision in these measurements underscores the importance of gaining a comprehensive understanding instrument properties, particular emphasis on study beam properties and, particular, their characteristics, measurement angle. In this context, major challenge lies scarcity millimeter polarized astrophysical sources sufficient...
Abstract This work is part of a series papers describing in detail the design and characterization LSPE-Strip , microwave telescope operating Q- W-bands which foreseen to be installed at Observatorio del Teide Tenerife. The paper aims describe Pointing Reconstruction Model (PRM) prototype Star Tracker, will mounted on . reconstruction crucial step deriving sky maps foreground emissions. PRM charge integrating information instantaneous attitude provided by control system, encoded two angles,...
The contribution of the unresolved extragalactic radio sources to diffuse brightness sky was evaluated using source number-flux measurements available in literature. We first optimized fitting function data based on number counts' distribution. then computed temperature at various frequencies from 151 8440 MHz and derived its spectral dependence. As expected frequency dependence can be described by a power law with index γ ≃ − 2.7, agreement flux emitted steep-spectrum sources. flat-spectrum...
Abstract A prototype version of the Q & U bolometric interferometer for cosmology (QUBIC) underwent a campaign testing in laboratory at Astroparticle Physics and Cosmology Paris (APC). The detection chain is currently made 256 NbSi transition edge sensors (TES) cooled to 320 mK. readout system 128:1 time domain multiplexing scheme based on 128 SQUIDs 1 K that are controlled amplified by SiGe application specific integrated circuit 40 K. We report performance this characterization TES....
Abstract Sensitive wide-field observations of polarized thermal emission from interstellar dust grains will allow astronomers to address key outstanding questions about the life cycle matter and energy driving formation stars evolution galaxies. Stratospheric balloon-borne telescopes can map this at far-infrared wavelengths near peak spectrum—wavelengths that are inaccessible ground. In paper we sensitivity achievable by a Super Pressure Balloon polarimetry mission, using as an example...
At frequencies close to 1 GHz the sky diffuse radiation is a superposition of Galactic origin, 3 K relic or cosmic microwave background radiation, and signal produced by unresolved extragalactic sources. Because their different origin space distribution, relative importance three components varies with frequency depends on direction observation. With aim disentangling we built TRIS, system radiometers, studied temperature at ν = 0.6, 0.82, 2.5 using geometrically scaled antennas identical...
Abstract The Q and U Bolometric Interferometer for Cosmology (QUBIC) is a ground-based experiment that aims to detect B-mode polarization anisotropies [1] in the CMB at angular scales around ℓ ≃100 recombination peak. Systematic errors make observations of B modes millimetre wavelengths very challenging QUBIC mitigates these problems somewhat complementary way other existing or planned experiments using novel technique bolometric interferometry. This takes advantage sensitivity an imager...
This study presents recent advancements in Josephson Traveling Wave Parametric Amplifiers (JTWPAs) developed and tested at INRiM within the DARTWARS project framework. Combining junctions with superconducting coplanar waveguides, JTWPAs offer advanced capabilities for quantum-limited broadband microwave amplification emission of non-classical radiation. The work delves into architecture, optimization, experimental characterization a JTWPA Resonant Phase-Matching mechanism, highlighting...
With the TRIS experiment we have performed absolute measurements of sky brightness in a circle at $δ= +42^{\circ}$ frequencies $ν=$ 0.60, 0.82 and 2.5 GHz. In this paper discuss techniques used to separate different contributions emission give an evaluation temperature Cosmic Microwave Background. For black-body CMB get: $T_{cmb}^{th}=(2.837 \pm 0.129 0.066)K$ $ν=0.60$ GHz; $T_{cmb}^{th}=(2.803 0.051 ^{+0.430} _{-0.300})K$ $ν=0.82$ $T_{cmb}^{th}=(2.516 0.139 0.284)K$ $ν=2.5$ The first error...
Bolometric interferometry is a novel technique that has the ability to perform spectral imaging. A bolometric interferometer observes sky in wide frequency band and can reconstruct maps several sub-bands within physical post-processing of data. This provides powerful method discriminate between cosmic microwave background (CMB) astrophysical foregrounds. In this paper, methodology illustrated with examples based on Q \& U Interferometer for Cosmology (QUBIC) which ground-based instrument...
Current experiments aimed at measuring the polarization of Cosmic Microwave Background (CMB) use cryogenic detector arrays and cold optical systems to boost mapping speed sky survey. For these reasons, large volume systems, with windows, working continuously for years, are needed. Here we report on system QUBIC (Q U Bolometric Interferometer Cosmology) experiment: describe its design, fabrication, experimental optimization validation in Technological Demonstrator configuration. The is based...
The recent developments in quantum technologies, as well advanced detection experiments, have raised the need to detect extremely weak signals microwave frequency spectrum. To this aim, Josephson travelling wave parametric amplifier, a device capable of reaching noise limit while providing wide bandwidth, has been proposed suitable cryogenic front-end amplifier. This work deals with numerical study without approximations regarding nonlinearity key elements. In particular, we focus on...