J. P. Filippini
A5082259532- Cosmology and Gravitation Theories
- Superconducting and THz Device Technology
- Dark Matter and Cosmic Phenomena
- Radio Astronomy Observations and Technology
- Particle physics theoretical and experimental studies
- Particle Detector Development and Performance
- Astrophysics and Cosmic Phenomena
- Galaxies: Formation, Evolution, Phenomena
- Scientific Research and Discoveries
- Geophysics and Gravity Measurements
- Computational Physics and Python Applications
- Astronomy and Astrophysical Research
- Terahertz technology and applications
- Advanced Thermodynamic Systems and Engines
- Spacecraft and Cryogenic Technologies
- Astrophysics and Star Formation Studies
- Thermal Radiation and Cooling Technologies
- Spectroscopy and Laser Applications
- Atomic and Subatomic Physics Research
- Particle Accelerators and Free-Electron Lasers
- Antenna Design and Optimization
- Pulsars and Gravitational Waves Research
- Precipitation Measurement and Analysis
- Aerospace Engineering and Energy Systems
- Solar and Space Plasma Dynamics
University of Illinois Urbana-Champaign
2015-2024
University of Illinois System
2020-2024
University of British Columbia
2020
California Institute of Technology
2009-2020
Center for Astrophysics Harvard & Smithsonian
2016
Cardiff University
2016
Princeton University
2015
University of California, Berkeley
2003-2010
University of California System
2005-2006
(abridged for arXiv) We report results from the BICEP2 experiment, a cosmic microwave background (CMB) polarimeter specifically designed to search signal of inflationary gravitational waves in B-mode power spectrum around $\ell\sim80$. The telescope comprised 26 cm aperture all-cold refracting optical system equipped with focal plane 512 antenna coupled transition edge sensor 150 GHz bolometers each temperature sensitivity $\approx300\mu\mathrm{K}_\mathrm{CMB}\sqrt{s}$. observed South Pole...
We report the results of a joint analysis data from BICEP2/Keck Array and Planck. BICEP2 Keck have observed same approximately 400 deg$^2$ patch sky centered on RA 0h, Dec. $-57.5\deg$. The combined maps reach depth 57 nK deg in Stokes $Q$ $U$ band at 150 GHz. Planck has full polarization seven frequencies 30 to 353 GHz, but much less deeply any given region (1.2 $\mu$K 143 GHz). detect 150$\times$353 cross-correlation $B$-modes high significance. fit single- cross-frequency power spectra...
We report results from a blind analysis of the final data taken with Cryogenic Dark Matter Search experiment (CDMS II) at Soudan Underground Laboratory, Minnesota, USA. A total raw exposure 612 kg-days was analyzed for this work. observed two events in signal region; based on our background estimate, probability observing or more is 23%. These set an upper limit Weakly Interacting Massive Particle (WIMP)-nucleon elastic-scattering spin-independent cross-section 7.0x10^{-44} cm^2 WIMP mass 70...
We report results from a reanalysis of data the Cryogenic Dark Matter Search (CDMS II) experiment at Soudan Underground Laboratory. Data taken between October 2006 and September 2008 using eight germanium detectors are reanalyzed with lowered, 2 keV recoil-energy threshold, to give increased sensitivity interactions weakly interacting massive particles (WIMPs) masses below ∼10 GeV/c(2). This analysis provides stronger constraints than previous CDMS II for WIMP 9 GeV/c(2) excludes parameter...
We report results of a search for weakly interacting massive particles (WIMPS) with the silicon detectors CDMS II experiment. This blind analysis 140.2 kg day data taken between July 2007 and September 2008 revealed three WIMP-candidate events surface-event background estimate 0.41(-0.08)(+0.20)(stat)(-0.24)(+0.28)(syst). Other known backgrounds from neutrons 206Pb are limited to <0.13 <0.08 at 90% confidence level, respectively. The exposure this is equivalent 23.4 recoil energy range 7-100...
We present the science case, reference design, and project plan for Stage-4 ground-based cosmic microwave background experiment CMB-S4.
This book lays out the scientific goals to be addressed by next-generation ground-based cosmic microwave background experiment, CMB-S4, envisioned consist of dedicated telescopes at South Pole, high Chilean Atacama plateau and possibly a northern hemisphere site, all equipped with new superconducting cameras. CMB-S4 will dramatically advance cosmological studies crossing critical thresholds in search for B-mode polarization signature primordial gravitational waves, determination number...
We present results from an analysis of all data taken by the bicep2/Keck CMB polarization experiments up to and including 2015 observing season. This includes first Keck Array observations at 220 GHz additional 95 150 GHz. The Q U maps reach depths 5.2, 2.9, 26 μKCMB arcmin 95, 150, GHz, respectively, over effective area ≈400 square degrees. achieve a signal noise on polarized dust emission approximately equal that Planck 353 take auto cross spectra between these publicly available WMAP...
We report new results from the Cryogenic Dark Matter Search (CDMS II) at Soudan Underground Laboratory. Two towers, each consisting of six detectors, were operated for 74.5 live days, giving spectrum-weighted exposures 34 (12) kg d Ge (Si) targets after cuts, averaged over recoil energies 10--100 keV a weakly interacting massive particle (WIMP) mass $60\text{ }\text{ }\mathrm{GeV}/{c}^{2}$. A blind analysis was conducted, incorporating improved techniques rejecting surface events. No WIMP...
Abstract CMB-S4—the next-generation ground-based cosmic microwave background (CMB) experiment—is set to significantly advance the sensitivity of CMB measurements and enhance our understanding origin evolution universe. Among science cases pursued with CMB-S4, quest for detecting primordial gravitational waves is a central driver experimental design. This work details development forecasting framework that includes power-spectrum-based semianalytic projection tool, targeted explicitly toward...
We report the first results from a search for weakly interacting massive particles (WIMPs) in Cryogenic Dark Matter Search experiment at Soudan Underground Laboratory. Four Ge and two Si detectors were operated 52.6 live days, providing 19.4 kg d of net exposure after cuts recoil energies between 10 100 keV. A blind analysis was performed using only calibration data to define energy threshold selection criteria nuclear-recoil candidates. Using standard dark-matter halo nuclear-physics WIMP...
We report on the design and performance of BICEP2 instrument its three-year data set. was designed to measure polarization cosmic microwave background (CMB) angular scales 1 5 degrees ($\ell$=40-200), near expected peak B-mode signature primordial gravitational waves from inflation. Measuring B-modes requires dramatic improvements in sensitivity combined with exquisite control systematics. The telescope observed South Pole a 26~cm aperture cold, on-axis, refractive optics. also adopted new...
The Probe of Inflation and Cosmic Origins (PICO) is a proposed probe-scale space mission consisting an imaging polarimeter operating in frequency bands between 20 800 GHz. We describe the science achievable by PICO, which has sensitivity equivalent to more than 3300 Planck missions, technical implementation, schedule cost.
Abstract We present the first linear polarization measurements from 2015 long-duration balloon flight of Spider , which is an experiment that designed to map cosmic microwave background (CMB) on degree angular scales. The results these include maps and power spectra observations 4.8% sky at 95 150 GHz, along with internal consistency tests data. While polarized CMB anisotropy primordial density perturbations dominant signal in this region sky, Galactic dust emission also detected high...
We report on the design and performance of BICEP3 instrument its first three-year data set collected from 2016 to 2018. is a 52cm aperture, refracting telescope designed observe polarization cosmic microwave background (CMB) degree angular scales at 95GHz. It started science observation South Pole in with 2400 antenna-coupled transition-edge sensor (TES) bolometers. The receiver demonstrated new technologies such as large-diameter alumina optics, Zotefoam infrared filters, flux-activated...
The Cryogenic Dark Matter Search (CDMS-II) employs low-temperature Ge and Si detectors to seek Weakly Interacting Massive Particles (WIMPs) via their elastic scattering interactions with nuclei. Simultaneous measurements of both ionization phonon energy provide discrimination against background particles. For recoil energies above 10 keV, events due photons are rejected >99.99% efficiency. Electromagnetic very near the detector surface can mimic nuclear recoils because reduced charge...
Data taken during the final shallow-site run of first tower Cryogenic Dark Matter Search (CDMS II) detectors have been reanalyzed with improved sensitivity to small energy depositions. Four ∼224 g germanium and two ∼105 silicon were operated at Stanford Underground Facility (SUF) between December 2001 June 2002, yielding 118 live days raw exposure. Three both analyzed a new low-threshold technique, making it possible lower analysis thresholds down actual trigger ∼1 ∼2 keV, respectively....
We report on the first axion search results from Cryogenic Dark Matter Search (CDMS) experiment at Soudan Underground Laboratory. An energy threshold of 2 keV for electron-recoil events allows a possible solar conversion into photons or local galactic electrons in germanium crystal detectors. The sets an upper limit Primakov coupling ${g}_{a\ensuremath{\gamma}\ensuremath{\gamma}}$ $2.4\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}9}\text{ }\text{ }{\mathrm{GeV}}^{\ensuremath{-}1}$...
Bicep3 is a 550 mm-aperture refracting telescope for polarimetry of radiation in the cosmic microwave background at 95 GHz.It adopts methodology Bicep1, Bicep2 and Keck Array experiments -it possesses sufficient resolution to search signatures inflation-induced gravitational-wave while utilizing compact design ease construction facilitate characterization mitigation systematics.However, represents significant breakthrough per-receiver sensitivity, with focal plane area 5× larger than...
The CDMS and EDELWEISS collaborations have combined the results of their direct searches for dark matter using cryogenic germanium detectors. total data set represents 614 kg.d equivalent exposure. A straightforward method combination was chosen its simplicity before were exchanged between experiments. are interpreted in terms limits on spin-independent WIMP-nucleon cross-section. For a WIMP mass 90 GeV/c^2, where this analysis is most sensitive, cross-section 3.3 x 10^{-44} cm^2 excluded at...
We present estimates of line-of-sight distortion fields derived from the 95 GHz and 150 data taken by BICEP2, BICEP3, Keck Array up to 2018 observing season, leading cosmological constraints a study instrumental astrophysical systematics. Cosmological are three concerning gravitational lensing large-scale structure, polarization rotation magnetic or an axion-like field, screening effect patchy reionization. measure amplitude power spectrum $A_L^{\phi\phi}=0.95 \pm 0.20$. constrain rotation,...
The Cryogenic Dark Matter Search (CDMS) is an experiment to detect weakly interacting massive particles (WIMPs), which may constitute the universe's dark matter, based on their interactions with Ge and Si nuclei. We report results of analysis data from first two runs CDMS at Soudan Underground Laboratory in terms spin-dependent WIMP-nucleon $^{73}\mathrm{Ge}$ $^{29}\mathrm{Si}$. These exclude new regions WIMP parameter space, including relevant interpretations annual modulation signal...