F.J. Iguaz
A5059709965- Particle Detector Development and Performance
- Dark Matter and Cosmic Phenomena
- Radiation Detection and Scintillator Technologies
- Atomic and Subatomic Physics Research
- Particle physics theoretical and experimental studies
- Neutrino Physics Research
- Astrophysics and Cosmic Phenomena
- Nuclear Physics and Applications
- CCD and CMOS Imaging Sensors
- Photocathodes and Microchannel Plates
- Plasma Diagnostics and Applications
- Cosmology and Gravitation Theories
- Gas Sensing Nanomaterials and Sensors
- Advanced Chemical Sensor Technologies
- Muon and positron interactions and applications
- X-ray Spectroscopy and Fluorescence Analysis
- Advanced X-ray Imaging Techniques
- Analytical Chemistry and Sensors
- Solar and Space Plasma Dynamics
- Medical Imaging Techniques and Applications
- Astronomy and Astrophysical Research
- Adaptive optics and wavefront sensing
- Spectroscopy and Laser Applications
- Distributed and Parallel Computing Systems
- Magnetic Field Sensors Techniques
Institut de Recherche sur les Lois Fondamentales de l'Univers
2014-2025
Commissariat à l'Énergie Atomique et aux Énergies Alternatives
2014-2025
CEA Paris-Saclay
2014-2025
Synchrotron soleil
2019-2025
Université Paris-Saclay
2018-2024
Universidad de Zaragoza
2012-2022
Canfranc Underground Laboratory
2010-2020
European Organization for Nuclear Research
2014
Imperial College London
2013
University of Oxford
2013
Hypothetical low-mass particles, such as axions, provide a compelling explanation for the dark matter in universe. Such particles are expected to emerge abundantly from hot interior of stars. To test this prediction, CERN Axion Solar Telescope (CAST) uses 9 T refurbished Large Hadron Collider magnet directed towards Sun. In strong magnetic field, solar axions can be converted X-ray photons which recorded by detectors. 2013–2015 run, thanks low-background detectors and new telescope,...
The International Axion Observatory (IAXO) will be a forth generation axion helioscope. As its primary physics goal, IAXO look for axions or axion-like particles (ALPs) originating in the Sun via Primakoff conversion of solar plasma photons. In terms signal-to-noise ratio, about 4–5 orders magnitude more sensitive than CAST, currently most powerful helioscope, reaching sensitivity to axion-photon couplings down few × 10−12 GeV−1 and thus probing large fraction unexplored ALP parameter space....
The possibility to probe new physics scenarios of light Majorana neutrino exchange and right-handed currents at the planned next generation neutrinoless double beta decay experiment SuperNEMO is discussed. Its ability study different isotopes track outgoing electrons provides means discriminate underlying mechanisms for by measuring half-life electron angular energy distributions.
We present the case for a dark matter detector with directional sensitivity. This document was developed at 2009 CYGNUS workshop on detection, and contains contributions from theorists experimental groups in field. describe need sensitivity; each experiment presents their project's status; we close feasibility study scaling up to one ton detector, which would cost around $150M.
The CERN Axion Solar Telescope (CAST) has extended its search for solar axions by using 3He as a buffer gas. At T=1.8 K this allows larger pressure settings and hence sensitivity to higher axion masses than our previous measurements with 4He. With about 1 h of data taking at each 252 different we have scanned the mass range 0.39 eV < m_a 0.64 eV. From absence excess X-rays when magnet was pointing Sun set typical upper limit on axion-photon coupling g_ag 2.3 x 10^{-10} GeV^{-1} 95% CL, exact...
We study the feasibility of a new generation axion helioscope, most ambitious and promising detector solar axions to date. show that large improvements in magnetic field volume, x-ray focusing optics backgrounds are possible beyond those achieved CERN Axion Solar Telescope (CAST). For hadronic models, sensitivity axion-photon coupling gaγ ≳ few × 10−12 GeV−1 is conceivable, 1–1.5 orders magnitude CAST sensitivity. If also couple electrons, Sun produces larger flux for same value Peccei-Quinn...
A new Micromegas manufacturing technique, based on kapton etching technology, has been developed recently, resulting in further improvement of the characteristics detector, such as uniformity and stability. Excellent energy resolution obtained, reaching 11% FWHM for 5.9 keV photon peak the55Fe X-ray source 1.8% (with possible evidence less than 1%) 5.5 MeV alpha 241Am source. The Microbulk detector shows several advantages like flexible structure, low material high radio-purity, opening thus...
The CERN Axion Solar Telescope has finished its search for solar axions with (3)He buffer gas, covering the range 0.64 eV ≲ ma 1.17 eV. This closes gap to cosmological hot dark matter limit and actually overlaps it. From absence of excess x rays when magnet was pointing Sun we set a typical upper on axion-photon coupling gaγ 3.3 × 10(-10) GeV(-1) at 95% C.L., exact value depending pressure setting. Future direct axion searches will focus increasing sensitivity smaller values gaγ, example by...
A bstract This article describes BabyIAXO, an intermediate experimental stage of the International Axion Observatory (IAXO), proposed to be sited at DESY. IAXO is a large-scale axion helioscope that will look for axions and axion-like particles (ALPs), produced in Sun, with unprecedented sensitivity. BabyIAXO conceived test all subsystems (magnet, optics detectors) relevant scale final system thus serve as prototype IAXO, but same time fully-fledged physics reach itself, potential discovery....
In this Technical Design Report (TDR) we describe the NEXT-100 detector that will search for neutrinoless double beta decay (ββ0ν) in 136XE at Laboratorio Subterráneo de Canfranc (LSC), Spain. The document formalizes design presented our Conceptual (CDR): an electroluminescence time projection chamber, with separate readout planes calorimetry and tracking, located, respectively, behind cathode anode. is designed to hold a maximum of about 150 kg xenon 15 bar, or 100 10 bar. This option...
NEXT is an experiment dedicated to neutrinoless double beta decay searches in xenon. The detector a TPC, holding 100 kg of high-pressure xenon enriched the 136 Xe isotope. It under construction Laboratorio Subterráneo de Canfranc Spain, and it will begin operations 2015. concept provides energy resolutionbetter than 1% FWHM topological signal that can be used reduce background. Furthermore, technology extrapolated 1 ton-scale experiment.
The CERN Axion Solar Telescope (CAST) searches for $a\ensuremath{\rightarrow}\ensuremath{\gamma}$ conversion in the 9 T magnetic field of a refurbished LHC test magnet that can be directed toward Sun. Two parallel bores filled with helium adjustable pressure to match x-ray refractive mass ${m}_{\ensuremath{\gamma}}$ axion search ${m}_{a}$. After vacuum phase (2003--2004), which is optimal ${m}_{a}\ensuremath{\lesssim}0.02\text{ }\text{ }\mathrm{eV}$, we used $^{4}\mathrm{He}$ 2005--2007...
Abstract The PICOSEC Micromegas (MM) detector is a precise timing gaseous based on MM operating in two-stage amplification mode and Cherenkov radiator. Prototypes equipped with cesium iodide (CsI) photocathodes have shown promising time resolutions as 24 picoseconds (ps) for Minimum Ionizing Particles. However, due to the high hygroscopicity susceptibility ion bombardment of CsI photocathodes, alternative photocathode materials are needed improve robustness MM. Diamond-like Carbon (DLC) film...
Abstract PICOSEC Micromegas (MM) is a precise timing gaseous detector based on Cherenkov radiator coupled with semi-transparent photocathode and an MM amplifying structure. The concept was successfully demonstrated through single-channel prototype, achieving sub-25 ps time resolution Minimum Ionizing Particles (MIPs). A series of studies followed, aimed at developing robust, large-area, scalable detectors high resolution, complemented by specialized fast-response readout electronics. This...
NEXT-DEMO is a high-pressure xenon gas TPC which acts as technological test-bed and demonstrator for the NEXT-100 neutrinoless double beta decay experiment. In its current configuration apparatus fully implements design concept. This an asymmetric TPC, with energy plane made of photomultipliers tracking silicon (SiPM) coated TPB. The detector in this new has been used to reconstruct characteristic signature electrons dense gas, demonstrating ability identify MIP ``blob'' regions. Moreover,...
We propose an EASY (Electroluminescent ApparatuS of high Yield) and SOFT (Separated Optimized FuncTion) time-projection chamber for the NEXT experiment, that will search neutrinoless double beta decay (bb0nu) in Xe-136. Our experiment must be competitive with new generation bb0nu searches already operation or construction. This requires a detector very good energy resolution (<1%), low background con- tamination (1E-4 counts/(keV \bullet kg y)) large target mass. In addition, it needs to...
NEXT-DEMO is a large-scale prototype of the NEXT-100 detector, an electroluminescent time projection chamber that will search for neutrinoless double beta decay \XE using 100–150 kg enriched xenon gas. was built to prove expected performance NEXT-100, namely, energy resolution better than 1% FWHM at 2.5 MeV and event topological reconstruction. In this paper we describe its initial results. A 1.75% 511 keV (which extrapolates 0.8% MeV) obtained 10 bar pressure gamma-ray calibration source....
The Neutrino Experiment with a Xenon TPC (NEXT) is intended to investigate the neutrinoless double beta decay of 136Xe, which requires severe suppression potential backgrounds. An extensive screening and material selection process underway for NEXT since control radiopurity levels materials be used in experimental set-up must rare event searches. First measurements based on Glow Discharge Mass Spectrometry gamma-ray spectroscopy using ultra-low background germanium detectors at Laboratorio...
In this work we present a search for (solar) chameleons with the CERN Axion Solar Telescope (CAST). This novel experimental technique, in field of dark energy research, exploits both chameleon coupling to matter (βm) and photons (βγ) via Primakoff effect. By reducing X-ray detection threshold used axions from 1 keV 400 eV CAST became sensitive converted solar spectrum which peaks around 600 eV. Even though have not observed any excess above background, can provide 95% C.L. limit strength...