A5041845212- Dark Matter and Cosmic Phenomena
- Particle Detector Development and Performance
- Particle physics theoretical and experimental studies
- Astrophysics and Cosmic Phenomena
- Solar and Space Plasma Dynamics
- Cosmology and Gravitation Theories
- Neutrino Physics Research
- Education and Digital Technologies
- Astronomy and Astrophysical Research
- Atomic and Subatomic Physics Research
- Scientific Research and Discoveries
- Education Pedagogy and Practices
- Evasion and Academic Success Factors
- Age of Information Optimization
Universidade Federal do Triângulo Mineiro
2023
European Organization for Nuclear Research
2008-2015
We have searched for solar axions or other pseudoscalar particles that couple to two photons by using the CERN Axion Solar Telescope (CAST) setup. Whereas we previously reported results from CAST with evacuated magnet bores (Phase I), setting limits on lower mass axions, here report where were filled 4He gas II) of variable pressure. The introduction generates a refractive photon mγ, thereby achieving maximum possible conversion rate those axion masses ma match mγ. With 160 different...
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...
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...
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...
1. European Organization for Nuclear Research (CERN), Gen`eve, Switzerland2. DAPNIA, Centre d’´Etudes Nucl´eaires de Saclay (CEA-Saclay), Gif-sur-Yvett e, France3. Technische Universita¨t Darmstadt, IKP, Germany4. Max-Planck-Institut fu¨r extraterrestrische Physik, Garching, Germany5. Instituto F´isica y Altas Energ´ias, Universidad Zaragoza, Spain6. Enrico Fermi Institute and KICP, University of Chicago, IL, USA7. Aristotle Thessaloniki, Greece8. National Center Scientific “Demokritos”,...
The status of the solar axion search with CERN Axion Solar Telescope (CAST) will be presented. Recent results obtained by use $^3$He as a buffer gas has allowed us to extend our sensitivity higher masses than previous measurements $^4$He. With about 1 h data taking at each 252 different pressure settings we have scanned mass range 0.39 eV$ \le m_{a} $ 0.64 eV. From absence an excess x rays when magnet was pointing Sun set typical upper limit on axion-photon coupling g$_{aγ} 2.3\times...
The CAST (CERN Axion Solar Telescope) experiment is searching for solar axions by their conversion into photons inside the magnet pipe of an LHC dipole. analysis data recorded during first phase with vacuum in pipes has resulted most restrictive experimental limit on coupling constant to photons. In second phase, operating a buffer gas order extent sensitivity higher axion masses. We will present results $^{4}{\rm He}$ taking as well system upgrades that have been operated last year adapt...
We have started the development of a detector system, sensitive to single photons in eV energy range, be suitably coupled one CAST magnet ports. This system should open window on possible detection low Axion Like Particles emitted by sun. Preliminary tests involved cooled photomultiplier tube via Galileian telescope and switched 40 m long optical fiber. has reached limit background level alone ideal conditions, two solar tracking runs been performed with it at CAST. Such measurement never...
The CERN Axion Solar Telescope (CAST) is currently the most sensitive axion helioscope designed to search for axions produced by Primakoff process in solar core. CAST using a Large Hadron Collider (LHC) test magnet where could be converted into X-rays with energies up 10 keV. During phase I, experiment operated vacuum inside bores and covered masses 0.02 eV. In II, were filled buffer gas (first 4He later 3He) at various densities order extend sensitivity higher (up f .18 eV). II data taking...
Considerando o crescente uso de redes sociais por parte estudantes do ensino superior, dentro e fora da sala aula, este estudo visa analisar se há relação entre a utilização internet, desempenho acadêmico dos graduandos. Para desenvolvimento pesquisa foram coletados dados meio questionário semiestruturado posterior verificação comparação com média no curso. Participaram deste 24 graduandos matriculados nos períodos finais curso Licenciatura em Ciências Biológicas, uma instituição superior...
The CERN Axion Solar Telescope (CAST) experiment searches for axions from the Sun converted into few keV photons via inverse Primakoff effect in high magnetic field of a superconducting Large Hadron Collider (LHC) decommissioned test magnet.After results obtained with vacuum magnet pipes (phase I experiment) as well 4 He collaboration is now immersed data taking 3 He, to be finished 2011.The status will presented, including preliminary exclusion plot first data.CAST currently sensitive...
The CERN Axion Solar Telescope (CAST) is searching for solar axions which could be produced in the core of Sun via so-called Primakoff effect. Not only would these hypothetical particles solve strong CP problem, but they are also one favored candidates dark matter. In order to look originating from Sun, CAST uses a decommissioned LHC prototype magnet. its 10 m long magnetic field region 9 Tesla, reconverted into X-ray photons. Different detectors installed on both ends magnet, mounted...