C. Margalejo
A5081929715- Dark Matter and Cosmic Phenomena
- Particle Detector Development and Performance
- Astrophysics and Cosmic Phenomena
- Particle physics theoretical and experimental studies
- Atomic and Subatomic Physics Research
- Radiation Detection and Scintillator Technologies
- Photocathodes and Microchannel Plates
- Cosmology and Gravitation Theories
- Neutrino Physics Research
Universidad de Zaragoza
2019-2022
Canfranc Underground Laboratory
2020
We review the physics potential of a next generation search for solar axions: International Axion Observatory (IAXO) . Endowed with sensitivity to discover axion-like particles (ALPs) coupling photons as small gaγ∼ 10−12 GeV−1, or electrons gae∼10−13, IAXO has find QCD axion in 1 meV∼1 eV mass range where it solves strong CP problem, can account cold dark matter Universe and be responsible anomalous cooling observed number stellar systems. At same time, will have enough detect lower axions...
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....
The CAST-CAPP axion haloscope, operating at CERN inside the CAST dipole magnet, has searched for axions in 19.74 $\mu$eV to 22.47 mass range. detection concept follows Sikivie haloscope principle, where Dark Matter convert into photons within a resonator immersed magnetic field. is an array of four individual rectangular cavities inserted strong phase-matched maximize sensitivity. Here we report on data acquired 4124 h from 2019 2021. Each cavity equipped with fast frequency tuning mechanism...
The REST-for-Physics (Rare Event Searches Toolkit for Physics) framework is a ROOT-based solution providing the means to process and analyze experimental or Monte Carlo event data. Special care has been taken on traceability of code validation results produced within framework, together with connectivity between data stored registered through specific version metadata members. development was originally motivated cover needs at Rare experiments (experiments looking phenomena having extremely...
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. The...
Abstract TREX-DM (TPC Rare Event eXperiment for Dark Matter) is intended to look low mass WIMPs in the Canfranc Underground Laboratory (LSC) Spain, using light elements (Ne, Ar) as target a high pressure TPC equipped with Micromegas readouts. Here, description of detector, first results from commissioning data and expected sensitivity developed background model are briefly presented.
Rare event searches require extreme radiopurity in all detector components. This includes the active medium, which case of gaseous detectors, is operating gas. The gases used typically include noble gas mixtures with molecular quenchers. Purification these required to achieve desired performance, however, purifiers are known emanate 222 Rn, a potential source background. Several studied for their O 2 and H purification efficiency Rn emanation rates, aiming identify lowest-Rn options....
BabyIAXO is a helioscope under construction to search for an emission of the axion particle from Sun. At same time it serves as intermediate stage towards International Axion Observatory (IAXO). An integral component this experiment low background X-ray detector with high efficiency in 1–10 keV energy range. Micromegas detectors are considered baseline technology thanks relatively and very level. Other technologies developed reach better resolution while maintaining level also study. In...
Axions are a natural consequence of the Peccei-Quinn mechanism, most compelling solution to strong-CP problem. Similar axion-like particles (ALPs) also appear in number possible extensions Standard Model, notably string theories. Both axions and ALPs very well motivated candidates for Dark Matter, addition, they would be copiously produced at sun’s core. A relevant effort during last decade has been CAST experiment CERN, sensitive axion helioscope to-date. The International Axion Observatory...
It has been previously advocated that the presence of daily and annual modulations axion flux on Earth's surface may dramatically change strategy searches. The arguments were based so-called Axion Quark Nugget (AQN) dark matter model which was originally put forward to explain similarity visible cosmological densities $\Omega_{\rm dark}\sim \Omega_{\rm visible}$. In this framework, population galactic axions with mass $ 10^{-6} {\rm eV}\lesssim m_a\lesssim 10^{-3}{\rm eV}$ velocity $\langle...
Surface contamination of $^{222}$Rn progeny from the $^{238}$U natural decay chain is one most difficult background contributions to measure in rare event searches experiments. In this work we propose AlphaCAMM, a gaseous chamber read with segmented Micromegas, for direct measurement $^{210}$Pb surface flat samples. The detection concept exploits readout capabilities Micromegas detectors reconstruction $^{210}$Po alpha tracks increase signal-to-background ratio. We report here on design and...
The International AXion Observatory (IAXO) is a large scale axion helioscope that will look for axions and axion-like particles produced in the Sun with unprecedented sensitivity. BabyIAXO an intermediate experimental stage be hosted at DESY (Germany) test all IAXO subsystems serving as prototype but same time fully-fledged potential discovery. One of crucial components project ultra-low background X-ray detectors image photons by conversion experiment. baseline detection technology this...
The TREX-DM detector, a low background chamber with microbulk Micromegas readout, was commissioned in the underground laboratory of Canfranc (LSC) 2018. Since then, data taking campaigns have been carried out Argon and Neon mixtures, at different pressures from 1 to 4 bar. By achieving energy threshold keV$_{ee}$ level 80 counts keV$^{-1}$ Kg$^{-1}$ day$^{-1}$ region 7 keV$_{ee}$, experiment demonstrates its potential search for low-mass WIMPs. Two most important challenges currently faced...
Surface contamination of $^{222}$Rn progeny from the $^{238}$U natural decay chain is one most difficult background contributions to measure in rare event searches experiments. In this work we propose AlphaCAMM, a gaseous chamber read with segmented Micromegas, for direct measurement $^{210}$Pb surface flat samples. The detection concept exploits readout capabilities Micromegas detectors reconstruction $^{210}$Po alpha tracks increase signal-to-background ratio. We report here on design and...