I.V. Kotov
A5053423160- Particle Detector Development and Performance
- Particle physics theoretical and experimental studies
- CCD and CMOS Imaging Sensors
- Radiation Detection and Scintillator Technologies
- High-Energy Particle Collisions Research
- Infrared Target Detection Methodologies
- Quantum Chromodynamics and Particle Interactions
- Calibration and Measurement Techniques
- Nuclear Physics and Applications
- Adaptive optics and wavefront sensing
- Silicon and Solar Cell Technologies
- Astronomical Observations and Instrumentation
- Dark Matter and Cosmic Phenomena
- Atomic and Subatomic Physics Research
- Astrophysics and Cosmic Phenomena
- Electron and X-Ray Spectroscopy Techniques
- Advanced Semiconductor Detectors and Materials
- X-ray Spectroscopy and Fluorescence Analysis
- Astronomy and Astrophysical Research
- Gamma-ray bursts and supernovae
- Neutrino Physics Research
- Particle Accelerators and Free-Electron Lasers
- Image Processing Techniques and Applications
- Spectroscopy and Laser Applications
- Radiation Effects in Electronics
Brookhaven National Laboratory
2015-2024
King Abdullah University of Science and Technology
2024
Moscow Institute of Physics and Technology
2021
Moscow Power Engineering Institute
2021
Central Research Institute of Epidemiology
2021
Belarusian Russian University
2017
The Ohio State University
1998-2010
Istituto Nazionale di Fisica Nucleare, Sezione di Trieste
2003
Institute for High Energy Physics
1986-2002
Institute of Physics of Molecules and Crystals
2001
Abstract The nEXO neutrinoless double beta (0 νββ ) decay experiment is designed to use a time projection chamber and 5000 kg of isotopically enriched liquid xenon search for the in 136 Xe. Progress detector design, paired with higher fidelity its simulation an advanced data analysis, based on one used final results EXO-200, produce sensitivity prediction that exceeds half-life 10 28 years. Specifically, improvements have been made understanding production scintillation photons charge as...
E896 has measured Lambda production in 11.6A GeV/c Au-Au collisions over virtually the whole rapidity phase space. The midrapidity p(t) distributions have been for first time at this energy and appear to indicate that hyperons different freeze-out conditions than protons. A comparison with relativistic quantum molecular dynamics model shows while there is good shape agreement high predicts significantly slopes of m(t) spectra midrapidity. data, where overlap occurs, are consistent previously...
The vertex \ensuremath{\gamma}\ensuremath{\rightarrow}3\ensuremath{\pi} has been investigated in the reaction of pion pair production by pions nuclear Coulomb field, ${\ensuremath{\pi}}^{\ensuremath{-}}$+(Z,A)\ensuremath{\rightarrow}${\ensuremath{\pi}}^{\ensuremath{-}}$+${\ensuremath{\pi}}^{0}$+(Z,A), region low-invariant-mass ${\ensuremath{\pi}}^{\mathrm{\ensuremath{-}}}$${\ensuremath{\pi}}^{0}$ pairs. experiment carried out 40-GeV beam IHEP accelerator (Serpukhov) with SIGMA spectrometer....
LSST parameters are discussed and requirements on the camera presented. Characterization methods results a number of new devices produced specifically to address LSST's performance goals, including flatness, QE, full well capacity, linearity, dark current, read noise, CTE, image persistence The indicate that commercially produced, thick n-channel over-depleted CCDs can achieve excellent red response, high low current satisfy with no evidence persistent artifacts. We will also report ongoing...
The Large Synoptic Survey Telescope (LSST) camera will be made as a mosaic assembled of 189 large format Charge Coupled Devices (CCD). They are n-channel, 100 micron thick devices operated in the over depleted regime. There 16 segments, 1 million pixels each, that read out through separate amplifiers. image quality and readout speed expected from LSST translates into strict acceptance requirements for individual sensors. Prototype sensors preproduction CCDs were delivered by vendors they...
Liquid xenon time projection chambers are promising detectors to search for neutrinoless double beta decay (0$\nu \beta \beta$), due their response uniformity, monolithic sensitive volume, scalability large target masses, and suitability extremely low background operations. The nEXO collaboration has designed a tonne-scale chamber that aims 0$\nu \beta$ of \ce{^{136}Xe} with projected half-life sensitivity $1.35\times 10^{28}$~yr. To reach this sensitivity, the design goal is $\leq$1\%...
The LSST Camera science sensor array will incorporate 189 large format Charge Coupled Device (CCD) image sensors. Each CCD include over 16 million pixels and be divided into equally sized segments each segment read through a separate output amplifier. goals of the project require sensors with state art performance in many aspects. broad survey wavelength coverage requires fully depleted, 100 micrometer thick, high resistivity, bulk silicon as imager substrate. Image quality requirements...
Future wide field astronomical surveys, like Large Synoptic Survey Telescope (LSST), require photometric precision on the percent level. The accuracy of sensor calibration procedures should match these requirements. Pixel size variations found in CCDs from different manufacturers are source systematic errors flat procedure. To achieve required to meet most demanding science goals this effect be taken into account. study pixel area was performed for fully depleted, thick produced a technology...
Knowledge of the point spread function (PSF) sensors to be used in Large Synoptic Survey Telescope (LSST) camera is essential for optimal extraction subtle galaxy shape distortions caused by gravitational weak lensing. We have developed a number techniques measuring PSF candidate CCD LSST camera, each with its own strengths and weaknesses. The two main optical measurement that we use are direct Virtual Knife Edge (VKE) scan as Karcher, et al.<sup>1</sup> indirect interference fringe method...
Neutrinoless double beta decay is one of the most sensitive probes for new physics beyond Standard Model particle physics. One isotopes under investigation <a:math xmlns:a="http://www.w3.org/1998/Math/MathML"><a:mmultiscripts><a:mi>Xe</a:mi><a:mprescripts/><a:none/><a:mn>136</a:mn></a:mmultiscripts></a:math>, which would into <b:math xmlns:b="http://www.w3.org/1998/Math/MathML"><b:mmultiscripts><b:mi>Ba</b:mi><b:mprescripts/><b:none/><b:mn>136</b:mn></b:mmultiscripts></b:math>. Detecting...
We have measured the production of light nuclei (A<~3) in 11.6GeV/c Au-Au collisions at Brookhaven Alternating Gradient Synchrotron (AGS). The transverse mass spectra are analyzed using a thermal fireball model, and yields for different particle species discussed assuming coalescence fragmentation as possible mechanisms. wide acceptance range 3He measurements permits broad study parameter B3 functions momentum rapidity. Comparisons with data obtained previously AGS energies suggest that...
We present characterization methods and results on a number of new devices produced specifically to address LSST's performance goals, including flatness, QE, PSF, dark current, read noise, CTE, cosmetics, crosstalk. The indicate that commercially produced, thick n-channel over-depleted CCDs with excellent red response can achieve tight PSF at moderate applied substrate bias no evidence persistent image artifacts. will also report ongoing studies mosaic assembly techniques chip-to-chip...
The science focal plane of the Large Synoptic Survey Telescope is made up 21 modules designated "raft towers". Each raft tower module (RTM) an autonomous, fully-testable and serviceable 144 Mpixel imager consisting nine highly-segmented CCDs with complete readout electronics chain. To minimize noise obscuration RTM housed in a compact enclosure fully contained within camera cryostat. required to meet strict performance goals for image flatness, speed, noise, power dissipation. Key components...
Near-future astronomical survey experiments, such as LSST, possess system requirements of unprecedented fidelity 1 that span photometry, astrometry and shape transfer.Some these flow directly to the array science imaging sensors at focal plane.Availability high quality characterization data acquired in course our sensor development program has given us an opportunity develop test a framework for simulation modeling is based on limited set physical geometric effects.In this paper we describe...
E896 was designed to search for the predicted short-lived six-quark H0 di-baryon. The goal is enhance existing knowledge by extending into regions of shorter lifetimes (approximately half that lambda) and via exploring a new creation channel, coalescence two lambdas. Two main tracking chambers are used, distributed drift chamber positioned measure low-pt high-rapidity neutral particle decay products silicon detector array which measures production at mid-rapidity. Both detectors also...
We present the results of an experimental investigation production in nuclear Coulomb field low-invariant-mass pions pairs by reaction ${\ensuremath{\pi}}^{\mathrm{\ensuremath{-}}}$Z\ensuremath{\rightarrow}${\ensuremath{\pi}}^{\mathrm{\ensuremath{-}}}$${\ensuremath{\pi}}^{0}$Z at 40 GeV. have obtained for first time value \ensuremath{\gamma}\ensuremath{\rightarrow}3\ensuremath{\pi} coupling constant...