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TUX01 |
Status of the NICA Project at JINR |
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- G.V. Trubnikov
JINR, Dubna, Moscow Region, Russia
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The project of Nuclotron-based Ion Collider fAcility NICA under development at JINR (Dubna) is presented. The general goals of the project are providing of colliding beams for experimental studies of both hot and dense strongly interacting baryonic matter and spin physics (in collisions of polarized protons and deuterons). The first program requires providing of heavy ion collisions in the energy range of 4 - 11 GeV at average luminosity of 1027 cm-2*s-1 for 197Au79+ nuclei. The report contains description of the facility scheme and characteristics in heavy ion operation mode, status and plans of the project development.
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Slides TUX01 [5.862 MB]
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| TUX02 |
Accelerator Complex U70 of IHEP: Status and Upgrades |
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- S.V. Ivanov
IHEP, Moscow Region, Russia
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Funding: National Research Center "Kurchatov Institute"
The report overviews present status of the Accelerator Complex U70 of IHEP-Protvino. It is a sequel to prior status reports delivered to RuPAC-2008, -2010 and -2012, and outlines the recent machine-related activity and upgrades in a run-by-run chronological ordering.
* Оn behalf of the U70 staff
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Slides TUX02 [3.512 MB]
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TUPSA01 |
Trapping of Electron Bunches Injected in a Wake Wave |
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- S.V. Kuznetsov
JIHT RAS, Moscow, Russia
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The process of electron trapping by a wake wave excited by a laser pulse in a plasma channel in the case where the electron bunches are injected into the vicinity of the maximum of the wakefield potential at a velocity lower than the wave phase velocity is investigated analytically and numerically*. The mechanism for the formation of a compact electron bunch in the trapping region when only the electrons of the injected bunch that are trapped in the focusing phase mainly undergo the subsequent acceleration in the wake field is analyzed. The influence of the spatial dimensions of the injected bunch and its energy spread on the length of the trapped electron bunch and the fraction of trapped electrons is studied. Formulas have been derived that allows one to accurately estimate the length of the trapped electron bunch and the number of electrons in it. It is shown that the influence of the transverse dimensions of the injected bunch on the length of the trapped electron bunch in the accelerating stage is as important as the influence of its longitudinal size.
*S.V. Kuznetsov Plasma Physics Reports, 2014, Vol. 40, No. 8, pp. 611–622.
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| TUPSA02 |
Superconducting Unclosed Shields in High Energy Physics |
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- E.A. Kulikov, G.L. Dorofeev, V.M. Drobin
JINR/VBLHEP, Dubna, Moscow region, Russia
- H. Malinowski, A.V. Smirnov
JINR, Dubna, Russia
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This paper presents the experimental and theoretical results of studying the unclosed shields made from LTS (low temperature superconductor) and HTS (high temperature superconductor) materials to obtain a homogeneous magnetic field in solenoids. There is a comparison of LTS and HTS shields,the construction peculiarities are described. HTS shield was proposed to obtain the required magnetic field homogeneity (about 10-5) in the 6 meters length solenoid of the electron cooling section which will be installed in the heavy ion collider of the NICA project (JINR, Russia).
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TUPSA03 |
Some Perspectives and Estimates of the Accelerator Technique Application |
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- V.A. Vorontsov
MEPhI, Moscow, Russia
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The short analysis of the current situation in accelerating technique development is done. It is shown that the new stage of this development can be connected with drastically increasing of the energy and the current of the accelerated charged particle beams. The scale of this increasing is discussed. The accelerator technique paradigm changing is connected with the refusing from the well-known accelerating methods and the primary using of the combination of the laser, plasma and the solid state body electromagnetic fields to increase the mentioned above accelerator parameters. In this case for example the perspective power programs can receive a new impulse in their development. That is why the creation of new big scales accelerators can be paid off and the new physics investigation horizons are opened also. The ways to try to do so are discussed and some parameters of such charged particle accelerators and the appropriate resulting estimates are presented.
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| TUPSA04 |
Operating Frequency and Accelerating Structure Geometry Chose for the Travelling Wave Compact Electron Linear Accelerator |
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- E.A. Savin, I.D. Sokolov
MEPhI, Moscow, Russia
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For the compact electron linear accelerating structure based on the hybrid scheme which consists from SW biperiodic structure buncher and TW DLS with magnetic couple TW accelerating part, the best option for the operating frequency and cells geometry has been chosen. Comparative calculations for the DLS cells with magnetic couple and without it, on the different operating frequencies and with the different couple coefficient were carried out. The best option will be manufactured, measured and used in the accelerator structure.
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| TUPSA05 |
Three Electrode Electron Gun with the Decreased Anode Voltage Geometry Optimization |
45 |
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- E.A. Savin, S.V. Matsievskiy, N.P. Sobenin
MEPhI, Moscow, Russia
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Three electrode gun, consisting of spherical cathode, control electrode and anode, has been designed. Anode potential was varying between 30 kV and 50 kV. For the each potential the control electrode potential has been chosen to achieve the smallest beam crossover in the middle of the first accelerator cell. Calculations was based on the model of the already existing gun – electron injector in the linear accelerator. Then all calculations for the different anode voltages has been repeated for the biger cathode, that means – different cathode electrode geometry. The result to use in the further accelerator calculations has been achieved.
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| TUPSA06 |
Beam Dynamics Calculation in the Induction Linear Accelerator |
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- E.A. Savin
MEPhI, Moscow, Russia
- A.A. Zavadtsev
Nano, Moscow, Russia
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The geometry of the induction electron accelerator, which will be used for high current acceleration, has been calculated. For the different currents values the optimum focusing magnetic field and has been obtained. Also a current in the compensative coil near the cathode has been calculated. The cathode electrode geometry was changing to achieve minimum beam oscillations during the acceleration.
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