V. Samsonov
A5082601931- High-Energy Particle Collisions Research
- Particle physics theoretical and experimental studies
- Quantum Chromodynamics and Particle Interactions
- Particle Detector Development and Performance
- Radiation Detection and Scintillator Technologies
- Nuclear reactor physics and engineering
- Crystallography and Radiation Phenomena
- Dark Matter and Cosmic Phenomena
- Nuclear Physics and Applications
- Advanced X-ray Imaging Techniques
- Superconducting Materials and Applications
- Neutrino Physics Research
- Particle Accelerators and Free-Electron Lasers
- CCD and CMOS Imaging Sensors
- Nuclear physics research studies
- Muon and positron interactions and applications
- Radioactivity and Radon Measurements
- Radioactive contamination and transfer
- Pulsars and Gravitational Waves Research
- Computational Physics and Python Applications
- X-ray Spectroscopy and Fluorescence Analysis
- Distributed and Parallel Computing Systems
- Luminescence Properties of Advanced Materials
- Advanced Electron Microscopy Techniques and Applications
- Microstructure and mechanical properties
Augustana University
2014-2024
Banaras Hindu University
2003-2024
Bhabha Atomic Research Centre
2018-2024
Petersburg Nuclear Physics Institute
2014-2023
Moscow Engineering Physics Institute
2015-2023
Brookhaven National Laboratory
2023
European Organization for Nuclear Research
2012-2023
Centre National de la Recherche Scientifique
2023
New Mexico State University
2023
Oak Ridge National Laboratory
2023
Radioactive emissions into the atmosphere from damaged reactors of Fukushima Dai-ichi nuclear power plant (NPP) started on March 12th, 2011. Among various radionuclides released, iodine-131 ((131)I) and cesium isotopes ((137)Cs (134)Cs) were transported across Pacific toward North American continent reached Europe despite dispersion washout along route contaminated air masses. In Europe, first signs releases detected 7 days later while peak activity level was observed between 28th 30th. Time...
Significance A massive atmospheric release of radioactive 106 Ru occurred in Eurasia 2017, which must have been caused by a sizeable, yet undeclared nuclear accident. This work presents the most compelling monitoring dataset this release, comprising 1,100 and 200 deposition data points from Eurasian region. The suggest reprocessing facility located Southern Urals, possibly Mayak complex. crashed satellite as well on Romanian territory (despite high activity concentrations) can be excluded....
From early April 2020, wildfires raged in the highly contaminated areas around Chernobyl nuclear power plant (CNPP), Ukraine. For about 4 weeks, fires spread and into exclusion zone (CEZ) came within a few kilometers of both CNPP radioactive waste storage facilities. Wildfires occurred on several occasions throughout month April. They were extinguished, but weather conditions by airborne embers smoldering led to new starting at different locations CEZ. The forest only completely under...
A front-end ASIC for GEM detectors readout in the CBM experiment is presented. The design has following features: dynamic range of 100 fC, channel hit rate 2 MHz, ENC 1000 e- at 50 pF, power comsumption 10 mW per channel, 6 bit SAR ADC. chip includes 8 analog processing chains, each consisting preamplifier, two shapers (fast and slow), differential comparator an area efficient ADC with 1.2 consunption Msps. also threshold DAC digital part.
A prototype readout channel was manufactured in UMC CMOS 180 nm for the purpose of CBM experiment at FAIR accelerator. The includes a preamplifier with fast and slow CR-RC shapers, discriminator differential threshold setup circuit, 6-bit SAR ADC (DNL = 0.70, INL 0.45), digital peak detector block time stamp registration. control data, clock output data are supplied through SLVS transmitter receiver. channels have 1000 el 1500 ENC accordingly 50 pF capacitance. Power consumption is 10 mW/channel.
The main task of the future Compressed Baryonic Matter experiment (CBM), to be operated at FAIR facility GSI, Darmstadt, is exploration properties super-dense nuclear matter. search for in-medium modifications hadrons, study transition from dense hadronic matter quark-gluon matter, and possible location a critical endpoint in QCD phase diagram strongly interacting are most important physics goals CBM. Detailed measurements di-leptons stemming low-mass vector-mesons charmonium have large...
Currently the multichannel readout chip for GEM detectors with an asynchronous architecture is being developed. The paper describes 32-channel GEMs and test results of building blocks. includes full channel analog front-end digital back-end. a preamplifier fast slow CR-RC shapers, discriminator differential threshold setup circuit, 8 bit SAR ADC (30 MSps rate, 1.5 mW power consumption), peak detector block time stamp registration. has feature preventing false detection. version considered to...
The measurement results of the front-end ASIC for GEM detector read-out are presented. MUCH v2 was designed and prototyped via Europractice by means 0.18 um CMOS MMRF process UMC (Taiwan). parameters analog channels, including CSA, fast slow shapers, discriminators, were measured. channels provide a sufficient dynamic range 100 fC, low power consumption 10 mW per channel ENC 1550 el at 50 pF capacitance.
The CBM RICH detector will use CO2 as radiator gas, focussing glass mirrors with Al+MgF2 reflective and protective coating Hamamatsu H12700 MAPMTs photon detectors. serve for electron to pion separation up momenta of 8 GeV/c thus enable in the measurement electromagnetic radiation from early dense fireball A+A collisions at SIS 100. In this article, current status development be presented including new measurements hardness MAPMT WLS coatings p-terphenyl, concept readout electronics,...