Персона: Воробьев, Владислав Станиславович
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Владислав Станиславович
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- ПубликацияТолько метаданныеAnisotropy in the Directions of Arrival of Muon Bundles Detected at the NEVOD Experimental Complex(2019) Khohlov, S. S.; Amelchakov, M. B.; Vorobyev, V. S.; Izhbulyakova, Z. T.; Kovylyaeva, A. A.; Хохлов, Семен Сергеевич; Амельчаков, Михаил Борисович; Воробьев, Владислав Станиславович© 2019, Allerton Press, Inc.Abstract: Results are presented from studying the anisotropy of the flux of very high-energy cosmic rays on the basis of muon bundles. Events were recorded in the period 2012–2018 by the DECOR coordinate-tracking detector, part of the unique research setup of the NEVOD experimental complex. The results from analyzing the anisotropy for two samples of events with muon bundles corresponding to different ranges of primary particle energy (E > 1015 eV and E > 1016 eV) are discussed, and estimates are made of dipole anisotropy parameters (amplitude and phase).
- ПубликацияТолько метаданныеThe FPGA time-to-digital converter for the large-scale detector TREK based on multi-wire drift chambers(2020) Vorobyev, V. S.; Borissov, A. A.; Kozhin, A. S.; Kompaniets, K. G.; Fakhrutdinov, R. M.; Zadeba, E. A.; Воробьев, Владислав Станиславович; Кожин, Анатолий Сергеевич; Компаниец, Константин Георгиевич; Фахрутдинов, Ринат Макаримович; Задеба, Егор АлександровичThe new large-scale coordinate-tracking detector TREK is under construction in MEPhI. It is based on 264 multi-wire drift chambers (4000 x 508 x 112 mm(3) size) developed in IHEP for experiments on the neutrino channel of the U-70 accelerator, and will have 250 m(2) of continuous effective area. The main goal of the project is the solution of so-called "muon puzzle": the unpredicted by any theory excess of high multiplicity muon bundles generated by ultra-high energy primary cosmic rays. Besides of a set of field-forming wires, each multi-wire drift chamber has 4 signal ones. The current from these wires is processed by the shaper-amplifier AMP-4, mounted on the front of the chamber. It generates LVDS pulses that should be processed by multi-channel TDC that faces two main requirements: large matching window (more than 6000 ns) with last significant digit (LSD) less than 10 ns and capability to hold more than 50 hits per channel in a single event. These conditions were fulfilled by the new time-to-digital converter developed on the basis of Cyclone V FPGA in MEPhI. This paper presents the design of the TDC, its main features and the first benchmarks of its performance.