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Analysis of the XENON100 dark matter search data

Aprile, E.; Alfonsi, M.; Arisaka, K.; Arneodo, F.; Balan, C.; Baudis, L.; Behrens, A.; Beltrame, P.; Bokeloh, K.; Brown, E.; Bruno, G.; Budnik, R.

The XENON100 experiment, situated in the Laboratori Nazionali del Gran Sasso, aims at the direct detection of dark matter in the form of weakly interacting massive particles (WIMPs), based on their interactions with xenon nuclei in an ultra low background dual-phase time projection chamber. This paper describes the general methods developed for the analysis of the XENON100 data. These methods have been used in ...


The scintillation and ionization yield of liquid xenon for nuclear recoils

Sorensen, P.; Manzur, A.; Dahl, C. E.; Angle, J.; Aprile, E.; Arneodo, F.; Baudis, L.; Bernstein, A.; Bolozdynya, A.; Coelho, L. C. C.; DeViveiros, L.

http://www.sciencedirect.com/science/article/B6TJM-4VBDGYK-3/2/955ce6ee62330f437f352d46bbc8f500


Quantitative monitoring of an activated sludge reactor using on-line UV-visible...

Sarraguça, M. C.; Paulo, A.; Alves, M. M.; Dias, A. M. A.; Lopes, J. A.; Ferreira, E. C.

The performance of an activated sludge reactor can be significantly enhanced through use of continuous and real-time process-state monitoring, which avoids the need to sample for off-line analysis and to use chemicals. Despite the complexity associated with wastewater treatment systems, spectroscopic methods coupled with chemometric tools have been shown to be powerful tools for bioprocess monitoring and contro...


Anacardic acid derivatives from Brazilian propolis and their antibacterial acti...

Silva,M. S. S.; De Lima,S. G.; Oliveira,E. H.; Lopes,J. A. D.; Chaves,M. H.; Reis,F. A. M.; Citó,A. M. G. L.

Propolis is a sticky, gummy, resinous substance collected by honeybees (Apis mellifera L.) from various plant sources, which has excellent medicinal properties. This paper describes the isolation and identification of triterpenoids and anacardic acid derivatives from Brazilian propolis and their antibacterial activity. Their structures were elucidated by ¹H and 13C NMR, including uni- and bidimensional techniqu...

Data: 2008   |   Origem: OASIS br

Surveying an activated sludge reactor using online UV-visible and NIR spectrosc...

Paulo, A.; Dias, A. M. A.; Sarraguça, M. C.; Lopes, J. A.; Alves, M. M.; Ferreira, E. C.

The performance of activated sludge reactors can be enhanced by the ability to monitor the status of the process without the need for chemicals addition or complex calibration procedures. Nowadays automation is still limited by poor sensor performance and high maintenance costs. Spectroscopic methods associated with chemometrics are being presented as a powerful tool for process monitoring and control. Once imp...


Activated sludge process monitoring through in situ near-infrared spectral anal...

Dias, A. M. A.; Moita, I.; Páscoa, R.; Alves, M. M.; Lopes, J. A.; Ferreira, E. C.

The application of near infrared (NIR) spectroscopy for industrial process monitoring is achieving increasing importance over the last twenty years. In fact, the real time monitoring capacity of NIR spectroscopy is a very important feature for process monitoring, prediction and control as it allows a fast evaluation of the state of the process. However, the application of NIR spectroscopy in wastewater treatmen...


Monitoring an activated sludge reactor using IR spectroscopy

Dias, A. M. A.; Paulo, A.; Mesquita, D. P.; Alves, M. M.; Lopes, J. A.; Ferreira, E. C.


XENON

Aprile, E.; Giboni, K.-L.; Monzani, M. E.; Plante, G.; Yamashita, M.; Gaitskell, R. J.; Fiorucci, S.; Sorensen, P.; DeViveiros, L.; Bernstein, A.

The XENON experiment aims at the direct detection of dark matter in the form of WIMPs (Weakly Interacting Massive Particles) via their elastic scattering off Xenon nuclei. With 1 ton of LXe distributed in ten identical modules, the proposed XENON1T experiment will achieve a sensitivity more than a factor of thousand beyond current limits.The detectors are time projection chambers operated in dual (liquid/gas) p...


3D Position Sensitive XeTPC for Dark Matter Search

Angle, J.; Aprile, E.; Arneodo, F.; Baudis, L.; Bernstein, A.; Bolozdynya, A.; Coelho, L.; Dahl, E.; DeViveiros, L.; Ferella, A.; Fernandes, L.

The technique to realize 3D position sensitivity in a two-phase xenon time projection chamber (XeTPC) is described. Results from a prototype detector (XENON3) are presented. ; http://www.sciencedirect.com/science/article/B6TVD-4R68DXJ-13/1/c7a25befd9bec275706d42709c6eb3c6


Measurement of the photoelectron-collection efficiency in noble gases and methane

Coelho, L. C. C.; Ferreira, H. M. N. B. L.; Lopes, J. A. M.; Dias, T. H. V. T.; Ferreira, L. F. R.; Santos, J. M. F. dos; Breskin, A.; Chechik, R.

The photoelectron-collection efficiency from photocathodes in noble gases and methane is experimentally investigated. The ratio between the number of transmitted photoelectrons in the gas media and in vacuum is determined as a function of the applied reduced electric field E/p, where p is the gas pressure. Results are presented for He, Ne, Ar, Xe, Kr and CH4. ; http://www.sciencedirect.com/science/article/B6...


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    Financiadores do RCAAP

Fundação para a Ciência e a Tecnologia Universidade do Minho   Governo Português Ministério da Educação e Ciência Programa Operacional da Sociedade do Conhecimento União Europeia