Antonino Tobia
A5085887265- Particle Detector Development and Performance
- Antenna Design and Analysis
- Nuclear Physics and Applications
- Calibration and Measurement Techniques
- Astrophysical Phenomena and Observations
- Advanced Antenna and Metasurface Technologies
- Metamaterials and Metasurfaces Applications
- Radiation Detection and Scintillator Technologies
- Advanced X-ray and CT Imaging
- CCD and CMOS Imaging Sensors
- Planetary Science and Exploration
- Radiation Effects in Electronics
- Astronomical Observations and Instrumentation
- X-ray Spectroscopy and Fluorescence Analysis
- Satellite Communication Systems
- Antenna Design and Optimization
- Radio Frequency Integrated Circuit Design
- Energy Harvesting in Wireless Networks
- Millimeter-Wave Propagation and Modeling
- Magnetic Bearings and Levitation Dynamics
- Electromagnetic Scattering and Analysis
- Terahertz technology and applications
- Protein Tyrosine Phosphatases
- Advanced Power Amplifier Design
- Advanced Materials and Mechanics
Airbus (Italy)
2024
British Columbia Children's Hospital
2024
Institute for Space Astrophysics and Planetology
2018-2023
National Institute for Astrophysics
2018-2022
Roma Tre University
2015-2018
University of Rome Tor Vergata
2011
While X-ray Spectroscopy, Timing and Imaging have improved verymuch since 1962, when the first astronomical non-solar source was discovered, especially with launch of Newton/X-ray Multi-Mirror Mission, Rossi/X-ray Explorer Chandra/Advanced Astrophysics Facility, progress polarimetry has been meager. This is in part due to lack sensitive polarization detectors, fate approved missions because celestial sources appeared less polarized than expected. Only one positive measurement available until...
Due to be launched in late 2021, the Imaging X-Ray Polarimetry Explorer (IXPE) is a NASA Small mission designed perform polarization measurements 2-8 keV band, complemented with imaging, spectroscopy and timing capabilities. At heart of focal plane set three polarization-sensitive Gas Pixel Detectors (GPD), each based on custom ASIC acting as charge-collecting anode. In this paper we shall review design, manufacturing, test IXPE focal-plane detectors, particular emphasis connection between...
IXPE is a Small Explorer mission that was launched at the end of 2021 to measure polarization X-ray emission from tens astronomical sources. Its focal plane detectors are based on Gas Pixel Detector, which measures by imaging photoelectron tracks in gas mixture and reconstructing their initial directions. The quality single track, then capability correctly determining original direction photoelectron, depends many factors, e.g., whether emitted low or high inclination with respect collection...
Abstract The Gas Pixel Detector (GPD) is an X-ray polarimeter to fly onboard IXPE and other missions. To correctly measure the source polarization, response of IXPE’s GPDs unpolarized radiation has be calibrated corrected. In this paper, we describe way such measured with laboratory sources algorithm apply correction observations celestial sources. latter allows correct polarization single photons, therefore allowing great flexibility in all subsequent analysis. Our approach tested against...
The NASA/ASI Imaging X-ray Polarimetry Explorer, which will be launched in 2021, the first instrument to perform spatially resolved polarimetry on several astronomical sources 2-8 keV energy band. These measurements are made possible owing use of a gas pixel detector (GPD) at focus three telescopes. GPD allows simultaneous interaction point, energy, arrival time, and polarization angle detected photons. increase sensitivity, achieved 40 years ago, for imaging spectroscopy with Einstein...
IXPE (Imaging X-ray Polarimetry Explorer) is a NASA Small Explorer mission -- in partnership with the Italian Space Agency (ASI) dedicated to polarimetry 2--8 keV energy band. The telescope comprises three grazing incidence mirror modules coupled detector units hosting each one Gas Pixel Detector (GPD), gas that allows measuring polarization degree by using photoelectric effect. A wide and accurate ground calibration was carried out on Units (DUs) at INAF-IAPS, Italy, where facility set-up...
The Imaging X-ray Polarimetry Explorer is a mission dedicated to the measurement of polarization from tens astrophysical sources belonging different classes. Expected be launched at end 2021, payload comprises three mirrors and focal plane imaging polarimeters, latter being designed built in Italy. While calibration always an essential phase development high-energy space missions, for IXPE it has been particularly extensive both calibrate response polarization, which peculiar IXPE, achieve...
The Imaging X-ray Polarimetry Explorer (IXPE) will add polarization to the properties (time, energy, and position) observed in x-ray astronomy. A NASA Astrophysics Small (SMEX) partnership with Italian Space Agency (ASI), IXPE measure 2–8-keV of a few dozen sources during first 2 years following its 2021 launch. Observatory includes three identical telescopes, each comprising 4-m-focal-length (grazingincidence) mirror module assembly (MMA) polarization-sensitive (imaging) detector unit (DU),...
We present the concept and design of an antenna-based device for restoring reflection from a ground plane over broad incidence angular range, when arbitrarily large object is placed on it. The proposed based fully passive antenna arrays, whose elements are properly connected to each other by following mirrored version Van Atta configuration used realizing retroreflective arrays. Thanks its self-adaptive behavior, allows faithfully emulating flat metallic plane, regardless angle illuminating...
The Imaging X-ray Polarimetry Explorer (IXPE) will expand the information space for study of cosmic sources, by adding polarization to properties (time, energy, and position) observed in x-ray astronomy. Selected 2017 January as a NASA Astrophysics Small (SMEX) mission, IXPE be launched into an equatorial orbit 2021. observatory includes three identical telescopes, each comprising 4-m-focal-length (grazing-incidence) mirror module assembly (MMA) polarization-sensitive (imaging) detector unit...
IXPE, the Imaging X-ray Polarimetry Explorer, is a NASA SMEX mission with an important contribution of ASI that will be launched Falcon 9 in 2021 and reopen window polarimetry after more than 40 years. The payload features three identical telescopes each one hosting light-weight mirror fabricated by MSFC detector unit its in-orbit calibration system Gas Pixel Detector sensitive to imaging polarization INAF/IAPS, INFN OHB Italy. focal length boom deployment from ATK-Orbital 4 m, while...
In this contribution, we discuss a possible antenna-based cloak for overcoming the intrinsic narrow frequency and angular bandwidths of conventional metasurface-based cloaks. The idea is to use fully passive antenna array mimic reflection from ground plane even in presence an electrically large metallic bump. Here, triangular bump over cloaked covering both sides by pair half-wavelength dipole arrays. Inspired Van Atta configuration, connect elements on one side other order restore phase...
Microwave waveguides allow an effective transfer of electromagnetic energy through straight connection or well-rounded curves, but become rather inefficient in case sharp bends squeezed waveguide cross-sections. Here, we discuss the possibility to funnel propagating a arbitrarily curved narrow channels hosting metamaterial-inspired structure able convert mode electric signal, and vice versa. We show experimentally how can be inserted within these propagation arbitrary lengths without...
IXPE (Imaging X-ray Polarimetry Explorer) is a NASA SMEX in partnership with ASI. The focal plane Detector Units (DUs) and the Service Unit (DSU) were developed by Italian research Institutes INAF-IAPS INFN manufactured OHB-I. will investigate polarimetry 2-8 keV energy band. payload comprises three identical telescopes, each composed of mirror detector unit an polarimeter based on Gas Pixel (GPD). A stray-light collimator (SLC) mounted top DU to shield GPD from background X-rays not coming...
The Gas Pixel Detector is a gas detector, sensitive to the polarization of X-rays, currently flying on-board IXPE - first observatory dedicated X-ray polarimetry. It detects X-rays and their by imaging ionization tracks generated photoelectrons absorbed in volume, then reconstructing initial direction photoelectrons. primary charge multiplied ultimately collected on finely-pixellated ASIC specifically developed for signal individual pixels processed independently gain variations can be...
IXPE scientific payload comprises of three telescopes, each composed a mirror and photoelectric polarimeter based on the Gas Pixel Detector design. The focal plane detectors, together with unit which interfaces them to spacecraft, are named Instrument they will be built calibrated in Italy; this proceeding, we present how calibrated, both on-ground in-flight. Calibration Equipment is being finalized at INAF-IAPS Rome (Italy) produce polarized unpolarized radiation, precise knowledge...
Scheduled to launch in late 2021 the Imaging X-ray Polarimetry Explorer (IXPE) is a Small Mission designed open up new window of investigation -- polarimetry. The IXPE observatory features 3 identical telescope each consisting mirror module assembly with polarization-sensitive imaging x-ray detector at its focus. An extending beam, deployed on orbit provides necessary 4 m focal length. payload sits atop 3-axis stabilized spacecraft which among other things power, attitude determination and...
We present a compact and efficient electromagnetic source able to generate 2-D Gaussian beam in parallel-plate waveguide. The waveguide is typical guiding structure used experimentally test laboratory the behavior of device under terms propagation, transmission, reflection. most common launcher for this quarter-wavelength monopole, which generates cylindrical wave. However, order approximate wave plane-wave impinging on test, needs electrically large setups. proposed solution makes use...
An L-band 20% BW pulsed power amplifier that provides 1KW output is presented. The circuit uses a combination of 500W NXP-LDMOS devices through the use simple multi-section microstrip (Duroid 6006) hybrids. Instantaneous duty cycle 1:10 with maximum pulse duration 1ms. This topology exhibits transfer gain 34dB, return losses better than 30dB along an efficiency located in range 40%, which suitable for SSPA-based Radar applications.
The Pixelated silicon Drift Detector (PixDD) is a two-dimensional multi-pixel X-ray sensor based on the technology of Silicon Detectors, designed to solve dead time and pile-up issues photon-integrating imaging detectors. Read out by self-triggering Application-Specific Integrated Circuit named RIGEL, which bump-bonded, it operates in 0:5 — 15 keV energy range achieve single-photon sensitivity good spectroscopic capabilities even at room temperature or with mild cooling (< 150 eV resolution...
IXPE (Imaging X-ray Polarimetry Explorer) is the next Nasa Small Explorer mission foreseen for lunch in 2021. It a partnership with Italian Space Agency (ASI). devoted to polarimetry 2-8 keV energy band. The telescope comprises three grazing incidence mirror modules coupled detector units hosting each one Gas Pixel Detector (GPD) polarimeter. GPD exploits photoelectric effect measure linear polarization of emission from astrophysical sources. A wide and accurate on ground calibration was...
In this contribution, we propose a fully passive antennas-based carpet cloak inspired by Van Atta array configuration for retroreflectors. We consider an electrically large triangular bump over ground plane, whose sides are covered two arrays of conventional half-wavelength dipoles. When illuminated plane wave, the energy is captured first and transmitted beyond obstacle second one. The VanAtta-inspired connection ensures restoration reflection angle as if were not present, mimicking...