61 research outputs found
Analytical study of ultrasound influence on the molten metals atomization
This paper focuses on the study of influence of ultrasound on liquid atomization using ejection nozzles. Two principles of influence of ultrasound on the atomization process such as a change of conditions on gas-liquid boundary during the generation of ultrasound oscillation in the gas and liquid jet (film) disintegration under the action of capillary forces in cases of generation of ultrasound oscillation in the liquid are considered. The optimal values of the ultrasound oscillation frequencies are calculated. Two constructions of the nozzles patented are proposed
Experimental study of flow around axisymmetric bodies in supersonic flow in case of a local injection into the boundary layer
A technique of experimental determination of the parameters and structure of supersonic air flow around of axisymmetric bodies form in the range of Mach numbers M = (2 ÷ 5) are presented. The results of the investigation of the interaction a supersonic stream flowing around of an axisymmetric model with gas jet which inject into the boundary layer are given
Mathematical simulation of the process of creating the silica particles morphology in plasma flow
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Atto Second Electron Beams Generation and Characterization Experiment at the Accelerator Test Facility.
We are proposing an Atto-second electron beam generation and diagnostics experiment at the Brookhaven Accelerator Test facility (ATF) using 1 {micro}m Inverse Free Electron Laser (IFEL). The proposed experiment will be carried out by an BNL/LBNL collaboration, and it will be installed at the ATF beam line II. The proposed experiment will employ a one-meter long undulator with 1.8 cm period (VISA undulator). The electron beam energy will be 63 MeV with emittance less than 2 mm-mrad and energy spread less than 0.05%. The ATF photocathode injector driving laser will be used for energy modulation by Inverse Free Electron Laser (IFEL). With 10 MW laser peak power, about 2% total energy modulation is expected. The energy modulated electron beam will be further bunched through either a drift space or a three magnet chicane into atto-second electron bunches. The attosecond electron beam bunches will be analyzed using the coherent transition radiation (CTR)
Status of Muon Collider Research and Development and Future Plans
The status of the research on muon colliders is discussed and plans are
outlined for future theoretical and experimental studies. Besides continued
work on the parameters of a 3-4 and 0.5 TeV center-of-mass (CoM) energy
collider, many studies are now concentrating on a machine near 0.1 TeV (CoM)
that could be a factory for the s-channel production of Higgs particles. We
discuss the research on the various components in such muon colliders, starting
from the proton accelerator needed to generate pions from a heavy-Z target and
proceeding through the phase rotation and decay ()
channel, muon cooling, acceleration, storage in a collider ring and the
collider detector. We also present theoretical and experimental R & D plans for
the next several years that should lead to a better understanding of the design
and feasibility issues for all of the components. This report is an update of
the progress on the R & D since the Feasibility Study of Muon Colliders
presented at the Snowmass'96 Workshop [R. B. Palmer, A. Sessler and A.
Tollestrup, Proceedings of the 1996 DPF/DPB Summer Study on High-Energy Physics
(Stanford Linear Accelerator Center, Menlo Park, CA, 1997)].Comment: 95 pages, 75 figures. Submitted to Physical Review Special Topics,
Accelerators and Beam
Gamma Factory at CERN – novel research tools made of light
We discuss the possibility of creating novel research tools by producing and
storing highly relativistic beams of highly ionised atoms in the CERN
accelerator complex, and by exciting their atomic degrees of freedom with
lasers to produce high-energy photon beams. Intensity of such photon beams
would be by several orders of magnitude higher than offered by the presently
operating light sources, in the particularly interesting gamma-ray energy
domain of 0.1-400 MeV. In this energy range, the high-intensity photon beams
can be used to produce secondary beams of polarised electrons, polarised
positrons, polarised muons, neutrinos, neutrons and radioactive ions. New
research opportunities in a wide domain of fundamental and applied physics can
be opened by the Gamma Factory scientific programme based on the above primary
and secondary beams.Comment: 12 pages; presented by W. Placzek at the XXV Cracow Epiphany
Conference on Advances in Heavy Ion Physics, 8-11 January 2019, Cracow,
Polan
An experimental study of flow over flat and axisymmetric bodies
The technique and results of an experimental study of the flow structure and critical parameters of the flow over flat and axisymmetric bodies in a range of the Mach numbers (M = 2 ÷ 5) are presented
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