Zobrazeno 1 - 10
of 819
pro vyhledávání: '"Chechik R"'
Autor:
Arazi, L., Breskin, A., Chechik, R., Cortesi, M., Pitt, M., Rubin, A., da Luz, H. Natal, Santos, J. M. F. dos, Azevedo, C. D. R., Covita, D. S., Oliveira, C. A. B., Veloso, J. F. C. A., Breidenbach, M., Freytag, D., Haller, G., Herbst, R., Park, S., White, A., Yu, J., Oliveri, E.
We report on the results of an extensive R&D program aimed at the evaluation of Thick-Gas Electron Multipliers (THGEM) as potential active elements for Digital Hadron Calorimetry (DHCAL). Results are presented on efficiency, pad multiplicity and disc
Externí odkaz:
http://arxiv.org/abs/1112.1915
Autor:
Gai, M., Ahmed, M. W., Stave, S. C., Zimmerman, W. R., Breskin, A., Bromberger, B., Chechik, R., Dangendorf, V., Delbar, Th., France III, R. H., Henshaw, S. S., Kading, T. J., Martel, P. P., McDonald, J. E. R., Seo, P. -N., Tittelmeier, K., Weller, H. R., Young, A. H.
Publikováno v:
Published in: JINST 5(2010)12004
We report on the construction, tests, calibrations and commissioning of an Optical Readout Time Projection Chamber (O-TPC) detector operating with a CO2(80%) + N2(20%) gas mixture at 100 and 150 Torr. It was designed to measure the cross sections of
Externí odkaz:
http://arxiv.org/abs/1101.1940
Autor:
Breskin, A., Peskov, V., Cortesi, M., Budnik, R., Chechik, R., Duval, S., Thers, D., Coimbra, A. E. C., Santos, J. M. F. dos, Lopes, J. A. M., Azevedo, C. D. R., Veloso, J. F. C. A.
Publikováno v:
Nucl.Instrum.Meth.A639:117-120,2011
The properties of UV-photon imaging detectors consisting of CsI-coated THGEM electron multipliers are summarized. New results related to detection of Cherenkov light (RICH) and scintillation photons in noble liquid are presented.
Comment: 5 Page
Comment: 5 Page
Externí odkaz:
http://arxiv.org/abs/1009.5883
Autor:
Amaro, F. D., Santos, C., Veloso, J. F. C. A., Breskin, A., Chechik, R., Santos, J. M. F. dos
Publikováno v:
JINST 5:P10002,2010
The operation principle and preliminary results of a novel gas-avalanche patterned hole electron multiplier, the Thick-COBRA (THCOBRA), are presented. This micro-hole structure is derived from the THGEM and MHSP. Sub-millimeter diameter holes are mec
Externí odkaz:
http://arxiv.org/abs/1008.0830
Publikováno v:
JINST 5:P11004,2010
The operation of single-, double- and triple-THGEM UV-detectors with reflective CsI photocathodes (CsI-THGEM) in Ne/CH4 and Ne/CF4 mixtures was investigated in view of their potential applications in RICH. The studies were carried out with UV, x-rays
Externí odkaz:
http://arxiv.org/abs/1008.0151
Autor:
Azevedo, C. D. R., Cortesi, M., Lyashenko, A. V., Breskin, A., Chechik, R., Miyamoto, J., Peskov, V., Escada, J., Veloso, J. F. C. A., Santos, J. M. F. dos
Publikováno v:
JINST 5:P01002,2010
The article deals with the detection efficiency of UV-photon detectors consisting of Thick Gas Electron Multipliers (THGEM) coated with CsI photocathode, operated in atmospheric Ne/CH4 and Ne/CF4 mixtures. We report on the photoelectron extraction ef
Externí odkaz:
http://arxiv.org/abs/0909.5357
Autor:
Cortesi, M., Peskov, V., Bartesaghi, G., Miyamoto, J., Cohen, S., Chechik, R., Maia, J. M., Santos, J. M. F. dos, Gambarini, G., Dangendorf, V., Breskin, A.
Publikováno v:
JINST 4:P08001,2009
The operation of Thick Gaseous Electron Multipliers (THGEM) in Ne and Ne/CH4 mixtures, features high multiplication factors at relatively low operation potentials, in both single- and double-THGEM configurations. We present some systematic data measu
Externí odkaz:
http://arxiv.org/abs/0905.2916
Autor:
Lyashenko, A. V., Breskin, A., Chechik, R., Santos, J. M. F. Dos, Amaro, F. D., Veloso, J. F. C. A.
Publikováno v:
A. Lyashenko et al., JINST 4 (2009) P07005
We summarize the development of visible-sensitive gaseous photomultipliers, combining a semitransparent bi-alkali photocathode with a state-of-the-art cascaded electron multiplier. The latter has high photoelectron collection efficiency and a record
Externí odkaz:
http://arxiv.org/abs/0905.0170
Publikováno v:
A.Lyashenko et. al., J. Appl. Phys. 106 (2009) 044902
The operation of visible-sensitive gaseous- and, to some extent, vacuum-photomultipliers is critically affected by secondary electrons originating from ion impact on the photocathode. A simple method for indirect measurement of the effective ion-indu
Externí odkaz:
http://arxiv.org/abs/0904.4881
We shortly describe recent progress in photon detectors combining bi-alkali photocathodes and cascaded patterned gas-avalanche electron multipliers. It permitted the development and the first feasibility demonstration of high-gain gaseous photomultip
Externí odkaz:
http://arxiv.org/abs/0808.1556