I. Tymchuk
A5017414253- Particle Detector Development and Performance
- Radiation Detection and Scintillator Technologies
- Particle physics theoretical and experimental studies
- Radiation Therapy and Dosimetry
- Nuclear Physics and Applications
- High-Energy Particle Collisions Research
- Material Properties and Applications
- Advanced Theoretical and Applied Studies in Material Sciences and Geometry
- Advanced MEMS and NEMS Technologies
- Spacecraft Design and Technology
- Laser Design and Applications
- CCD and CMOS Imaging Sensors
- Engineering Technology and Methodologies
- solar cell performance optimization
- Medical Imaging Techniques and Applications
- Advanced Data Storage Technologies
- Optical and Acousto-Optic Technologies
- Photodynamic Therapy Research Studies
- Advanced MRI Techniques and Applications
- Healthcare Systems and Practices
- Polymer Science and Applications
- Laser-Ablation Synthesis of Nanoparticles
- Advanced Semiconductor Detectors and Materials
- Radiation Effects in Electronics
- Technology Assessment and Management
Bogolyubov Institute for Theoretical Physics
2022-2024
National Academy of Sciences of Ukraine
2024
Energostal (Ukraine)
2020-2023
National Institute of Public Health
2021
Danylo Halytsky Lviv National Medical University
2021
Kharkiv Institute of Physics and Technology
2017
V. N. Karazin Kharkiv National University
2012
Jožef Stefan Institute
2010
Research Institute Orion
2009
Abstract Objective. Monolithic active pixel sensors are used for charged particle tracking in many applications, from medical physics to astrophysics. The Bergen pCT collaboration designed a sampling calorimeter proton computed tomography, based entirely on the ALICE PIxel DEtector (ALPIDE). same telescope can be in-situ range verification therapy. An accurate charge diffusion model is required convert deposited energy Monte Carlo simulations cluster of pixels, and estimate energy, given an...
A typical proton CT (pCT) detector comprises a tracking system, used to measure the position before and after imaged object, an energy/range residual range crossing object. The Bergen pCT collaboration was established design build prototype scanner with high granularity digital calorimeter (DTC) as both detector. In this work conceptual layout of mechanical electronics implementation, along Monte Carlo (MC) simulation new system are reported. DTC is multilayer structure lateral aperture 27...
Abstract The first evaluation of an ultra-high granularity digital electromagnetic calorimeter prototype using 1.0–5.8 GeV/c electrons is presented. 25 × 10 6 pixel detector consists 24 layers ALPIDE CMOS MAPS sensors, with a pitch around 30 μm, and has depth almost 20 radiation lengths tungsten absorber. Ultra-thin cables allow for very compact design. properties that are critical physics studies measured: shower response, energy resolution linearity. stochastic comparable the state-of-the...
Proton computed tomography (pCT) and radiography (pRad) are proposed modalities for improved treatment plan accuracy in situ validation proton therapy. The pCT system of the Bergen collaboration is able to handle very high particle intensities by means track reconstruction. However, incorrectly reconstructed secondary tracks degrade image quality. We have investigated whether a convolutional neural network (CNN)-based filter improve quality.The CNN was trained simulation reconstruction tens...
Abstract The Bergen proton Computed Tomography (pCT) is a prototype detector under construction. It aims to have the capability track and measure ions’ energy deposition minimize uncertainty in treatment planning. high granularity digital tracking calorimeter, where first two layers will act as obtain positional information of incoming particle. remainder calorimeter. Beam tests been performed with multiple beams. These shown that ALPIDE chip sensor can deposited energy, making it possible...
Objective.Proton therapy is highly sensitive to range uncertainties due the nature of dose deposition charged particles. To ensure treatment quality, verification methods can be used verify that individual spots in a pencil beam scanning fraction match plan. This study introduces novel metric for proton quality control based on spots.Approach.We employ uncertainty-aware deep neural networks predict Bragg peak depth an anthropomorphic phantom secondary particle detection silicon pixel...
Radiation therapy using protons and heavier ions is a fast-growing therapeutic option for cancer patients. A clinical system particle imaging in would enable online patient position verification, estimation of the dose deposition through range monitoring reduction uncertainties calculation relative stopping power patient. Several prototype modalities offer radiography computed tomography heavy ions. Digital Tracking Calorimeter (DTC), currently under development, has been proposed as one...
A prototype of a new type calorimeter has been designed and constructed, based on silicon-tungsten sampling design using pixel sensors with digital readout. It makes use the Alpide MAPS sensor developed for ALICE ITS upgrade. binary readout is possible due to size $\approx 30 \times \, \mu \mathrm{m}^2$. This successfully tested cosmic muons test beams at DESY CERN SPS. We report performance results obtained DESY, showing good energy resolution linearity, compare detailed MC simulations....
The silicon strip detector (SSD) modules cover the two outermost layers of Inner Tracking System ALICE. SSD collaboration performs module assembly in several locations Europe. Mass production was launched during autumn 2004 and presently all sites are producing successfully. bonding yield spTAB interconnections is approaching close to 100%. This paper describes phases bond process development for modules, including discussion on most probable rootcauses failures long-term reliability...
Healthcare-associated infections (HCAIs) are a global health problem, and the problem of HCAIs in Ukraine remains poorly understood because problems with registration system.To analyze official data number registered for period 2009-2019, compare them available scientific publications.Statistical analysis information from "Laboratory Centers Ministry Health Ukraine" kindly provided by State Institution "Public Center Ukraine".In 2019, 2,611 cases were registered, lowest annual last twelve...
Abstract The University of Bergen is involved in developing two calorimeters: the pixel section Electromagnetic Forward Calorimeter for ALICE Upgrade to be installed during LS3 data-taking period 2029–2032 and Digital Tracking proton Computed Tomography prototype. Both designs utilize sensors require a reliable connection readout which positioned approximately 5 meters away. Furthermore, structural design these calorimeters calls compact layer assembly. This paper provides strategies...
This article presesnts the construction and theoretical research of thermal models electronic modules with increased power based on combined boards aluminum bases using serial heat-welding polyimide - fluoroplastic films, including films conductivity from 0.12 to 0.46 W/m•K, as well lacquer foil dielectrics PI layers order 4.0 4.5 W/(m•K) improved by authors Designs quality test structures were developed. Experimental studies efficiency heat removal semiconductor devices in various types...
Detection and spectroscopy tests of the first functional unit a self-dependent silicon detection module constructed on base micro-cable TAB technology are presented. The were performed using pulse-height analysis signals induced by gamma rays in sensor. Good shapes spectra satisfactory resolution (given FWHM which is less than 2 keV) correspond with results wire bonded modules. This fact demonstrates that does not degrade performance modules prospective for construction small stack...
The authors propose fundamentally new design-technological solutions for compact volumetric mirrorized LED modules with increased power. Test samples of light-effective light effective a power 10—15 W and output 105—160 lm/W domestic retrofit lamps based on high-efficiency SMD, mini COB, COB LEDs third generation were manufactured tested. Positive technical practical results obtained by increasing over 4—6 times the size holders — heat sinks (compared to flat holders) dissipation from...
Highly segmented digital tracking calorimeters consist of multiple layers high-granularity pixel detector CMOS sensors and absorption/conversion layers. Two separate prototypes are being developed: (1) an electromagnetic calorimeter for a proposed ALICE upgrade (during Long Shutdown 3) (2) hadronic medical proton computed tomography imaging. These employ the ALPIDE chip developed Inner Tracking System. The chips mounted on intermediate aluminum/polyimide flexible circuits with ultrasonic...
Issues of direct modeling effective thermal conductivity two-component thermally conductive polyimide composite films based on thermosetting varnishes and powder fillers are considered.
 3D-structural elementary cubic cells composites has been performed.
 Calculations average heat fluxes variants with the introduction highly dispersed ultradispersed into matrix were carried out, including those from SiO2, SiC, Al2O3, AlN, taking account boundary initial conditions using COMSOL...