Andrey Alexandrov
Istituto Nazionale di Fisica Nucleare
Cosmic rayOpticsPhysicsMuonNuclear emulsionMicroscopeDetector
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Publications 11
#1Andrey AlexandrovH-Index: 6
#2Giovanni De LellisH-Index: 4
Last. Valeri TioukovH-Index: 6
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We propose a novel technique for fully automated optical scanning of thin samples. We analyze its performance and estimate the achievable scanning speed to compare it with conventional techniques. It paves the way to the next generation of highspeed scalable scanning systems, at least one order of magnitude faster than existing ones. We show that the efficiency and the accuracy of this new technique are comparable to those of the conventional ones, while the scanning speed scales proportionally ...
1 CitationsSource
#1N. Agafonova (RAS: Russian Academy of Sciences)H-Index: 17
#2Andrey AlexandrovH-Index: 6
Last. C. S. Yoon (Gyeongsang National University)H-Index: 22
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The OPERA experiment discovered muon neutrino into tau neutrino oscillations in appearance mode, detecting tau leptons by means of nuclear emulsion films. The apparatus was also endowed with electronic detectors with tracking capability, such as scintillator strips and resistive plate chambers. Because of its location, in the underground Gran Sasso laboratory, under 3800 m.w.e., the OPERA detector has also been used as an observatory for TeV muons produced by cosmic rays in the atmosphere. In th...
#1Andrey Alexandrov (INFN: Istituto Nazionale di Fisica Nucleare)H-Index: 6
#1A. Alexandrov (INFN: Istituto Nazionale di Fisica Nucleare)H-Index: 6
Last. A.E. VolkovH-Index: 16
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The paper presents the summary data of the authors' research within the framework of the OLIMPIYA project (the Russian acronym of {\bf OLI}viny iz {\bf M}eteoritov --- {\bf P}oisk tyazholykh {\bf I} sverkhtyazholykh {\bf YA}der / Olivines from meteorites: Search for heavy and superheavy nuclei) and results of track analysis for heavy cosmic ray nuclei (\emph{Z} = 26--129) in olivine crystals from meteorites using an original processing technique. A total of 21,743 tracks of nuclei heavier than i...
#1Giovanni De LellisH-Index: 4
#2Andrey AlexandrovH-Index: 6
Last. Nicola D’AmbrosioH-Index: 5
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#1Andrey Alexandrov (RAS: Russian Academy of Sciences)H-Index: 6
#2A. BuonauraH-Index: 11
Last. Elena Voevodina (RAS: Russian Academy of Sciences)H-Index: 1
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In the present paper we report the development of the Continuous Motion scanning technique and its implementation for a new generation of scanning systems. The same hardware setup has demonstrated a significant boost in the scanning speed, reaching 190 cm2/h. The implementation of the Continuous Motion technique in the LASSO framework, as well as a number of new corrections introduced are described in details. The performance of the system, the results of an efficiency measurement and potential ...
5 CitationsSource
#1Giuseppe BattistoniH-Index: 13
#2Andrey AlexandrovH-Index: 6
Last. Antonio ZoccoliH-Index: 85
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Particle therapy uses proton or 12C beams for the treatment of deep-seated solid tumors. Due to the features of energy deposition of charged particles a small amount of dose is released to the healthy tissue in the beam entrance region, while the maximum of the dose is released to the tumor at the end of the beam range, in the Bragg peak region. However nuclear interactions between beam and patient tissues induce fragmentation both of projectile and target and must be carefully taken into accoun...
7 CitationsSource
#1Andrey Alexandrov (RAS: Russian Academy of Sciences)H-Index: 6
#2T. Asada (Nagoya University)H-Index: 10
Last. Masahiro Yoshimoto (Nagoya University)H-Index: 9
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Abstract Nuclear emulsion is a perfect choice for a detector for directional DM search because of its high density and excellent position accuracy. The minimal detectable track length of a recoil nucleus in emulsion is required to be at least 100 nm, making the resolution of conventional optical microscopes insufficient to resolve them. Here we report about the R&D on a super-resolution optical microscope to be used in future directional DM search experiments with nuclear emulsion as a detector ...
#1Andrey Alexandrov (RAS: Russian Academy of Sciences)H-Index: 6
#2A. BuonauraH-Index: 11
Last. M. Vladymyrov (RAS: Russian Academy of Sciences)H-Index: 2
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The development of automatic scanning systems was a fundamental issue for large scale neutrino detectors exploiting nuclear emulsions as particle trackers. Such systems speed up significantly the event analysis in emulsion, allowing the feasibility of experiments with unprecedented statistics. In the early 1990s, R&D programs were carried out by Japanese and European laboratories leading to automatic scanning systems more and more efficient. The recent progress in the technology of digital signa...
13 CitationsSource
#1Andrey Alexandrov (RAS: Russian Academy of Sciences)H-Index: 6
#2A. BuonauraH-Index: 11
Last. M. Vladymyrov (RAS: Russian Academy of Sciences)H-Index: 5
view all 14 authors...
Nuclear emulsions have been widely used in particle physics to identify new particles through the observation of their decays thanks to their unique spatial resolution. Nevertheless, before the advent of automatic scanning systems, the emulsion analysis was very demanding in terms of well trained manpower. Due to this reason, they were gradually replaced by electronic detectors, until the '90s, when automatic microscopes started to be developed in Japan and in Europe. Automatic scanning was esse...
13 CitationsSource
#1Andrey Alexandrov (RAS: Russian Academy of Sciences)H-Index: 6
#2V. TioukovH-Index: 22
Last. M. Vladymyrov (RAS: Russian Academy of Sciences)H-Index: 2
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The LASSO (Large Angle Scanning System for OPERA) is a scanning system designed in the framework of the OPERA experiment as a result of several R&Ds aimed to improve the performance of the European Scanning System (ESS) by increasing the scanning speed, the angular acceptance and the efficiency in microtrack reconstruction. The novel Continuous Motion (CM) scanning approach allows to double the ESS nominal speed without any changes in the hardware set-up. The LASSO modular design makes the syste...
11 CitationsSource