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Search Results: 1 - 10 of 144327 matches for " B. Lubsandorzhiev "
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The quest for the ideal photodetector for the next generation deep-underwater neutrino telescopes
B. K. Lubsandorzhiev
Physics , 2008, DOI: 10.1016/j.nima.2008.07.055
Abstract: We review photodetectors used in present running neutrino telescopes. After a brief historical discourse, the photodetector requirements for the next generation deep underwater neutrino telescopes are discussed. It is shown that large area vacuum hybrid phototubes are the closest to the ideal photodetector for such kind of applications when compared with other vacuum phototubes.
New developments of photodetectors for the Lake Baikal Neutrino Experiment
B. K. Lubsandorzhiev
Physics , 2002,
Abstract: New developments of photodetectors for the lake Baikal neutrino experiment are described. Some test results of photodetectors at the lake Baikal are presented.
QUASAR-370 hybrid phototube as a prototype of a photodetector for the next generation of deep underwater neutrino telescopes
B. K. Lubsandorzhiev
Physics , 2009, DOI: 10.1016/j.nima.2009.05.168
Abstract: In this paper we show that QUASAR-370 large area hybrid phototube developed for and successfully used in a number of astroparticle physics experiments, the lake Baikal deep underwater neutrino experiment among them, could be used as a prototype of a photodetector for the next generation of giant neutrino telescopes.
On the history of photomultiplier tube invention
B. K. Lubsandorzhiev
Physics , 2006, DOI: 10.1016/j.nima.2006.05.221
Abstract: In this very short note we review some historical aspects of photomultiplier tube invention. It is our tribute to the memory of great Soviet-Russian physicist and engineer Leonid Aleksandrovitch Kubetsky whose life and scientific achievements are described briefly. Particular efforts are made to shed light on a controversial issue of who invented the first photomultiplier tube. It is asserted that if to recognize L.A.Kubetsky's priority on the photomultiplier tube invention the last Beaune Conference would be held on the eve of the 75th Anniversary of that great event.
The Quest for the Ideal Scintillator for Hybrid Phototubes
B. K. Lubsandorzhiev,B. Combettes
Physics , 2007, DOI: 10.1109/TNS.2008.924060
Abstract: In this paper we present the results of extensive studies of scintillators for hybrid phototubes with luminescent screens. The results of the developments of such phototubes with a variety of scintillators are presented. New scintillator materials for such kind of application are discussed. The requirements for scintillators to use in such hybrid phototubes are formulated. It is shown that very fast and highly efficient inorganic scintillators like ZnO:Ga will be ideal scintillators for such kind of application.
Stability studies of nanosecond light sources based on blue ultra bright LEDs
B. K. Lubsandorzhiev,Y. E. Vyatchin
Physics , 2004,
Abstract: We present the results of stability studies of nanosecond light sources based on single quantum well (SQW) InGaN/GaN ultra bright blue LEDs. It is shown that the light yield of such light sources and their timing characteristics don't deteriorate even after 10^10 total pulses. The longterm stability of the sources light yield is better than 1%.
Studies of "Kapustinsky's" light pulser timing characteristics
B. K. Lubsandorzhiev,Y. E. Vyatchin
Physics , 2004,
Abstract: We present the results of studies of a nanosecond light pulser built following J.S.Kapustinsky et al original design and using bright InGaN/GaN ultraviolet and blue LEDs produced by NICHIA CHEMICAL. It is shown how timing characteristics of the pulser depend on the type of LED and the value of power supply voltage.
Low temperature light yield measurements in NaI and NaI(Tl)
C. Sailer,B. Lubsandorzhiev,C. Strandhagen,J. Jochum
Physics , 2012, DOI: 10.1140/epjc/s10052-012-2061-7
Abstract: The scintillation light output of a pure and a Thallium doped Sodium Iodide (NaI) crystal under irradiation with 5.486MeV \alpha -particles has been measured over a temperature range from 1.7K to 300K. Estimates of the decay time constant at three selected temperatures are given. For pure NaI an increase in light yield towards low temperatures could be confirmed and measured at higher precision. For NaI(Tl) below 60K an increase in light output has been found.
An observation of a new class of afterpulses with delay time in the range of 70-200 microseconds in classical vacuum photomultipliers
R. V. Poleshchuk,B. K. Lubsandorzhiev,R. V. Vasiliev
Physics , 2012, DOI: 10.1016/j.nima.2011.11.030
Abstract: We present results of the first observation of afterpulses with extremely long (~120 microseconds) delay time from the main pulse in 8 inch classical vacuum photomultipliers.
A LED Flasher for TUNKA experiment
B. K. Lubsandorzhiev,R. V. Poleshuk,B. A. J. Shaibonov,Y. E. Vyatchin,A. Z. Zablotsky
Physics , 2007,
Abstract: A LED flasher has been developed for TUNKA-133 EAS Cherenkov detector. A blue ultra bright InGaN LED is used as a light source in the flasher. The flasher's driver is based on a fast discharge of a small capacitor via a complementary pair of fast RF transistors. The light yield of the flasher is adjusted in the wide range of from 0 to up to 10**9 photons per pulse. The results of studies of the flasher's amplitude and timing parameters and their stability are presented.
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