Testing χc\chi_c properties at BELLE II

The model of the $\chi_{c_i}-\gamma^*-\gamma^*$ and $\chi_{c_i}-J/\psi^*-\gamma^*$ form factors developed in [1] for $\chi_{c_1}$ and $\chi_{c_2}$ is extended to $\chi_{c_0}$ case. The studies performed within this model have shown that at BELLE II it will be possible to study in detail $\chi_{c_i}-\gamma^*-\gamma$ form factors through measurements of the reaction $e^+e^-\to e^+e^- \chi_{c_i} (\to J/\psi (\to \mu^+\mu^-)\gamma)$.The results were obtained using the newly updated Monte Carlo generator EKHARA

Studies of the Reaction e+e−→ e+e−χci(→ γJ∕ψ(→ μ+μ−)) at Belle II with the Monte Carlo Generator EKHARA

The Belle II experiment with the integrated luminosity of 50 ab 1 will allow for an access to information never available before. In this paper, we concentrate on studies of the chi(ci)-gamma*-gamma* form factors using the Monte Carlo event generator EKHARA. The precise experimental knowledge of the form factors can differentiate between various models giving predictions for the electronic widths Gamma(chi(c1, 2) -> e(+)e(-)), even without direct measurements of these widths

Backscattering of Electrons from Complex Structures

The backscattering of electrons from complex targets (for example, metal layer on a semi-infinite substrate with a polymer resist film above) has been studied both theoretically and experimentally. The experimental structures were exposed with an electron beam in a spot mode . The experimental observations of developed disc radius vs. exposure time and metal layer thickness support the simple theory of scattering in such structures. The theory assumes that the backscattering causes enlarging of the exposed area by a constant value. This value is derived from the proposed scattering model based on the Archard\u27s and Kanaya and Okayama\u27s diffusion theories. The radial exposure intensity distribution introduced by the electron beam has been approximated by a Gaussian function

Gas Flow Measurement in Gas Boilers

Import 23/07/2015Hlavním cílem bakalářské práce je zjištění všeobecného přehledu používaných měřicích zařízení pro průtok plynů u plynových kotlů používaných v energetice a konkretizovat jejich vhodnost použití pro požadovaný konkrétní případ. S touto problematikou je také spjata souvislost se samotnými plyny používanými v energetice. V tomto případě se jedná o plyny vzniklé druhotnou výrobou železa a koksu, ale také i o zemní plyn. Praktická část se zabývá firmou Energetika Třinec a.s., kde se tato práce pokouší zmapovat aktuální stav použití měřidel v praxi.The main objective of this thesis is to find a general overview of the measuring devices used for a gas flow on the gas boilers used in an energy industry and consolidate their suitability for the desired specific case. This issue is also linked relationship with gases by themselves used in the energy industry. In this case, the gases from the secondary production of iron and coke, but also certainly of natural gas. The practical part deals with the Energetika Trinec as. company, where this work tries to map the current state of the use of gauges in a practice.361 - Katedra energetikyvelmi dobř

Two-photon transition form factors of pseudoscalar mesons in the PHOKHARA and the EKHARA generators

The implementation of the newly developed two-photon transition form factors for pseudoscalar mesons in the PHOKHARA and the EKHARA generators is discussed. The forthcoming developments in the PHOKHARA generator are shortly reviewed

Modeling interactions of photons with pseudoscalar and vector mesons

We model the interaction of photons, pseudoscalars, and vector mesons within resonance chiral symmetric theory with SU(3) breaking. The couplings of the model are fitted to the experimental data. Within the developed model we predict the pseudoscalar-exchange light-by-light contributions to the muon anomalous magnetic moment aμP=(82.8±3.4)×10-11. The error covers also the model dependence within the class of models considered in this paper. The model was implemented into the Monte Carlo event generator ekhara to simulate reactions e+e-→e+e-P, P=π0,η,η′ and into the Monte Carlo event generator phokhara to simulate reactions e+e-→Pγ(γ)

Proposal for Utilization of Heat from Exchanger before Desulfurization Absorber in Power Plant Dětmarovice

Tato diplomová práce se zabývá možnostmi využití tepla, které vzniká během ochlazování spalin na vstupu do odsiřovací jednotky. Úvodem je provedeno zmapování aktuální koncepce s možností úprav výměníku pro zvýšení životnosti jak odsiřovací linky, tak zdroje získávání tepla. Zabývá se degradací aktuálního výměníku, naměřených hodnot látek vzniklých v absorbéru a provádí se technickoekonomické zhodnocení. V druhé fázi je proveden výpočet tepelného výměníku a možné návrhy umístění tepla do cyklu bloku či vytápění na popud elektrárny změnit trasu spalin z komína do chladících věží. Přílohou je výkresová dokumentace možného návrhu nového výměníku.This diploma thesis deals with possibilities of utilization of heat generated during cooling of flue gas at the entrance to desulphurization unit. At the beginning a mapping of the current concept with the possibility of modification of the exchanger to increase the life of both the desulphurization line and the heat recovery source has been made. It deals with the degradation of the current exchanger, the measured values of the substances generated in the absorber and the technical-economic evaluation. At the second stage, the heat exchanger has been calculated and possible suggestions for the placement of the heat in the block cycle or heating at the start of the power plant change the flue gas path from the chimney to the cooling towers. The attachment is a drawing documentation of a possible design of a new heat exchanger.361 - Katedra energetikyvýborn

Processingâ Dependent Microstructure of AgClâ CsAgCl2 Eutectic Photonic Crystals

Directional solidification of a eutectic melt allows control over the resultant eutectic microstructure, which in turn impacts both the mechanical and optical properties of the material. These selfâ organized phaseâ separated eutectic materials can be tuned to have periodicities from tens of micrometers down to nanometers. Furthermore, the two phases possess differences in their refractive index leading to interesting optical properties that can be tailored within the visible to infrared wavelength regime. It is found the binary salt eutectic AgClâ CsAgCl2 system forms a rod microstructure with sample draw rates up to 0.2 mm sâ 1 which transitions to a lamellar microstructure at draw rates greater than 0.36 mm sâ 1. Heatâ transfer simulations reveal a draw rateâ dependent direction of motion of the solidification front, which for a range of draw rates requires nucleation of the minority solid phase at the sample wall. Phaseâ field modeling indicates that the initial eutectic structure at the sample boundary, either rod or lamellar, dictates the bulk eutectic morphology. These samples contain submicrometer periodicities which coupled with their optical transparency results in them exhibiting draw rateâ dependent nearâ IR reflectance peaks consistent with stop bands for 2D hexagonal (rod) and 1D planar (lamellar) photonic crystals.The eutectic composition of the molten salts AgCl and CsCl exhibits a microstructural transition from rod to lamellar upon varying the draw rates controlled by directional solidification. This transition is dominated by the initial formation at the surface of either the rod or lamellar structure. The resultant eutectic microstructures have optical properties consistent with their being 2D and 1D photonic crystals.Peer Reviewedhttps://deepblue.lib.umich.edu/bitstream/2027.42/145412/1/adom201701316.pdfhttps://deepblue.lib.umich.edu/bitstream/2027.42/145412/2/adom201701316_am.pdfhttps://deepblue.lib.umich.edu/bitstream/2027.42/145412/3/adom201701316-sup-0001-S1.pd