E. Castelli
A5077620205- Pulsars and Gravitational Waves Research
- Radio Astronomy Observations and Technology
- Geophysics and Gravity Measurements
- Astrophysics and Cosmic Phenomena
- Computational Physics and Python Applications
- Scientific Measurement and Uncertainty Evaluation
- Advanced Frequency and Time Standards
- Cosmology and Gravitation Theories
- Particle accelerators and beam dynamics
- Ionosphere and magnetosphere dynamics
- Hepatitis C virus research
- HIV/AIDS drug development and treatment
- Solar and Space Plasma Dynamics
- Dark Matter and Cosmic Phenomena
- Soil Moisture and Remote Sensing
- Particle Accelerators and Free-Electron Lasers
- Calibration and Measurement Techniques
- Astronomical Observations and Instrumentation
- Particle Detector Development and Performance
- Atmospheric Ozone and Climate
- Atmospheric and Environmental Gas Dynamics
- Sleep and related disorders
- Geophysics and Sensor Technology
- Restless Legs Syndrome Research
- Superconducting and THz Device Technology
University of Trento
2018-2024
Istituto Nazionale di Fisica Nucleare, Trento Institute for Fundamental Physics And Applications
2018-2024
Laboratoire AstroParticule et Cosmologie
2024
Goddard Space Flight Center
2022
University of Maryland, Baltimore County
2022
University of Padua
2019-2022
University of Cagliari
2016
Azienda Socio Sanitaria Territoriale Grande Ospedale Metropolitano Niguarda
2016
In the months since publication of first results, noise performance LISA Pathfinder has improved because reduced Brownian due to continued decrease in pressure around test masses, from a better correction noninertial effects, and calibration electrostatic force actuation. addition, availability numerous long measurement runs, during which no perturbation is purposely applied allowed with good statistics down 20 μHz. The Letter presents measured differential acceleration figure, at...
We present an in-depth analysis of the LISA Pathfinder differential acceleration performance over entire course its science operations, spanning approximately 500 days. find: (1) The evolution Brownian noise that dominates amplitude spectral density (ASD), for frequencies f≳1 mHz, is consistent with decaying pressure due to outgassing a single gaseous species. (2) Between f=36 μHz and 1 ASD shows 1/f tail in excess almost constant amplitude, ≃20% fluctuations period few days, no particular...
The Space Technology 7 Disturbance Reduction System (ST7-DRS) is a NASA technology demonstration payload that operated from January 2016 through July 2017 on the European Agency's (ESA) LISA Pathfinder spacecraft. joint goal of and ESA missions was to validate key technologies for future space-based gravitational wave observatory targeting source-rich millihertz band. two primary components ST7-DRS are micropropulsion system based colloidal micro-Newton thrusters (CMNTs) control...
Early skin-to-skin contact (SSC) after birth is a physiological practice that internationally recommended and has well-documented importance for the baby mother. This study aims to examine SSC with cohort of mothers or fathers in operating room Cesarean section (C-section) its relationship duration breastfeeding. From January 1, 2012, December 31, at Castelli Hospital Verbania, Italy, Baby Friendly designated hospital, 252 consecutive women who had C-section were enrolled followed 6 months....
The science operations of the LISA Pathfinder mission have demonstrated feasibility sub-femto-g free fall macroscopic test masses necessary to build a gravitational wave observatory in space such as LISA. While main focus interest, i.e., optical axis or $x$-axis, has been extensively studied, it is also great importance evaluate stability spacecraft with respect all other degrees freedom (d.o.f.). current paper dedicated study: exhaustive and quantitative evaluation imperfections dynamical...
We report on the first subpicometer interferometer flown in space. It was part of ESA's Laser Interferometer Space Antenna (LISA) Pathfinder mission and performed fundamental measurement positional angular motion two free-falling test masses. The worked immediately, stably, reliably from switch until end with exceptionally low residual noise ${32.0}_{\ensuremath{-}1.7}^{+2.4}\text{ }\text{ }\mathrm{fm}/\sqrt{\mathrm{Hz}}$, significantly better than required. present an upper limit for sensor...
The LISA Pathfinder (LPF) mission succeeded outstandingly in demonstrating key technological aspects of future space-borne gravitational-wave detectors, such as the Laser Interferometer Space Antenna (LISA). Specifically, LPF demonstrated with unprecedented sensitivity measurement relative acceleration two free-falling cubic test masses. Although most disruptive nongravitational forces have been identified and their effects mitigated through a series calibration processes, some faint...
SARS-CoV-2 can produce both severe clinical conditions and long-term sequelae, but data describing post-acute COVID-19 syndrome (PACS) are lacking for people living with HIV (PLWH). We aimed at assessing the prevalence factors associated PACS in our cohort. included all unvaccinated adult PLWH on antiretroviral treatment plasma HIV-RNA < 40 cp/mL since least six months before infection Infectious Tropical Diseases Unit of Padua (Italy), from 20 February 2020 to 31 March 2021. severity was...
The (LPF) mission successfully demonstrated the feasibility of technology needed for future space borne gravitational wave observatory LISA. A key subsystem under study was laser interferometer, which measured changes in relative distance between two test masses (TMs). It achieved a sensitivity <a:math xmlns:a="http://www.w3.org/1998/Math/MathML"...
In a previous article [1], we have reported on the first subpicometer interferometer flown in space as part of ESA's LISA Pathfinder mission, and shown residual sensor noise to be level ${32.0}_{\ensuremath{-}1.7}^{+2.4}\text{ }\text{ }\mathrm{fm}/\sqrt{\mathrm{Hz}}$. This review provides deeper more complete overview full system its interferometric mission performance under varying operational conditions, allowing much detailed view model. We also include optical measurements rotations...
A comprehensive summary of the measurements made to characterize test-mass charging due space environment during LISA Pathfinder mission is presented. Measurements residual charge test mass after release by grabbing and positioning mechanism show that initial masses was negative all releases, leaving with a potential in range from $\ensuremath{-}12$ $\ensuremath{-}512$. Variations neutral rate between 21.7 $30.7\text{ }\text{ }e\text{ }{\mathrm{s}}^{\ensuremath{-}1}$ were observed over...
Background: The relationship between sleep disorders (SDs), cardiovascular risk (CVR), and mood (MDs) has been studied in detail the general population, but far less people with HIV (PWH). Methods: Cross-sectional analysis single centre cohort of PWH. Sleep quality was assessed using by Epworth Sleepiness Scale (ESS), Insomnia Severity Index (ISI), Berlin Questionnaire (BQ), Pittsburgh Quality (PSQI); anxiety depression were evaluated Generalized Anxiety Disorder-7 Patient Health...
The LISA Pathfinder charge management device was responsible for neutralising the cosmic ray induced electric that inevitably accumulated on free-falling test masses at heart of experiment. We present measurements made ground and in-flight quantify performance this contactless discharge system which based photo-emission under UV illumination. In addition, a two-part simulation is described developed alongside hardware. Modelling absorbed light within sensor carried out with GEANT4 software...
LISA Pathfinder (LPF) was a technology pioneering mission designed to test key technologies required for gravitational wave detection in space. In the low frequency regime (milli-Hertz and below), where space-based observatories will operate, temperature fluctuations play crucial role since they can couple into interferometric measurement masses' free-fall accuracy many ways. A dedicated subsystem, with noise levels 10$\,\mu$K$\,$Hz$^{-1/2}$ down $1\,$mHz part of diagnostics unit on board...
The LISA Pathfinder (LPF) mission has demonstrated the ability to limit and measure fluctuations in acceleration between two free falling test masses down sub-femto-g levels. One of key elements achieve such a level residual is drag control. In this scheme spacecraft used as shield against any external disturbances by adjusting its relative position reference mass. actuators move are cold gas micropropulsion thrusters. paper, we report in-flight characterization these thrusters term noise...
We present an in depth analysis of the transient events, or glitches, detected at a rate about one per day differential acceleration data LISA Pathfinder. show that these glitches fall two rather distinct categories: fast transients interferometric motion readout on side, and true force events other. The former are rare ordinary conditions. second may last from seconds to hours constitute majority glitches. physical statistical properties both categories, including cross-analysis with other...
We present a study of the tilt-to-length coupling noise during LISA Pathfinder mission and how it depended on system's alignment. Tilt-to-length is unwanted angular lateral spacecraft or test mass motion into primary interferometric displacement readout. It was one major sources in likewise expected to be source LISA. demonstrate here that recently derived published analytical model describes dependency alignment two freely falling masses. This verified with data taken before after...
Abstract The Laser Interferometer Space Antenna (LISA) mission is being developed by ESA with NASA participation. As it has recently passed the Mission Adoption milestone, models of instruments and noise performance are becoming more detailed, likewise prototype data analyses must as well. Assumptions such Gaussianity, stationarity, continuity unrealistic, be replaced physically motivated simulations, analysis methods adapted to accommodate likely imperfections. To this end, LISA Data...
LISA Pathfinder (LPF) was a European Space Agency mission with the aim to test key technologies for future space-borne gravitational-wave observatories like LISA. The main scientific goal of LPF demonstrate measurements differential acceleration between free-falling masses at sub-femto-$g$ level, and understand residual in terms physical model stray forces, displacement readout noise. A step toward reaching goals correct calibration dynamics LPF, which three-body system composed by two...
LISA Pathfinder (LPF) has been a space-based mission designed to test new technologies that will be required for gravitational wave observatory in space. Magnetically driven forces play key role the instrument sensitivity low-frequency regime (mHz and below), measurement band of interest observatory. The magnetic field can couple susceptibility remanent moment from masses disturb them their geodesic movement. carried on-board dedicated subsystem with noise levels 10 $ \rm nT \ Hz^{-1/2}$ 1...
We report on the results of LISA Pathfinder (LPF) free-fall mode experiment, in which control force needed to compensate quasistatic differential acting two test masses is applied intermittently as a series ``impulse'' forces lasting few seconds and separated by roughly 350 s periods true free fall. This represents an alternative normal LPF operation this balancing continuously, with advantage that acceleration noise during fall measured absence actuation force, thus eliminating associated...
The tilt-to-length coupling during the LISA Pathfinder mission has been numerically and analytically modeled for particular time spans. In this work, we investigate long-term stability of coefficients noise. We show that they drifted slowly (by <a:math xmlns:a="http://www.w3.org/1998/Math/MathML" display="inline"><a:mrow><a:mn>1</a:mn><a:mtext> </a:mtext><a:mtext> </a:mtext><a:mi>μm</a:mi><a:mo>/</a:mo><a:mi>rad</a:mi></a:mrow></a:math> <c:math xmlns:c="http://www.w3.org/1998/Math/MathML"...
Non-recurrent short term variations of the galactic cosmic-ray (GCR) flux above 70 MeV n$^{-1}$ were observed between 2016 February 18 and 2017 July 3 aboard European Space Agency LISA Pathfinder (LPF) mission orbiting around Lagrange point L1 at 1.5$\times$10$^6$ km from Earth. The energy dependence three Forbush decreases (FDs) is studied reported here. A comparison these observations with others carried out in space down to a few tens shows that same GCR parameterization applies events...