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| WEPSB001 |
Research of Photon Emission of 120 GeV Channeling Positrons
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positron, radiation, photon, simulation |
172 |
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- V. A. Maisheev, Y. A. Chesnokov, P. N. Chirkov, I. A. Yazynin
IHEP Protvino, Protvino, Moscow Region
- D. Bolognini, S. Hasan, M. Prest
Università dell'Insubria & INFN Milano Bicocca, Como
- E. Vallazza
INFN-Trieste, Trieste
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The process of radiation of 120-GeV positrons moving in a channeling regime in (011) and (111) plane of a single crystal was considered. At the beginning on the basis of the theory of nonlinear oscillations the trajectory of moving positrons at different initial conditions were derived. Then taking into account the nonlinearity of motion the distribution function over oscillation amplitudes of channeling particles was found. After this the intensity of radiation in thin crystal at different initial conditions was calculated with the help of two various methods. The received results have formed a basis for calculation of positron energy losses in not thin crystals taking into account the processes of dechanneling and multiplicity of generation of photons. Research was executed within the frame of experiment INSURAD ( the beam line 4Н, SPS, CERN). The calculations are in the good consent with preliminary results of this experiment. The received results can be used for creation of powerful sources of radiation and for collimation of positron beams in linear colliders.
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| THCHC02 |
Development of Fast-Cycling Superconducting Quadrupole and Corrector Magnets for the SIS 300
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quadrupole, sextupole, dipole, resonance |
300 |
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- L. Tkachenko, I. Bogdanov, S. Kozub, P. A. Shcherbakov, I. Slabodchikov, V. Sytnik, V. Zubko
IHEP Protvino, Protvino, Moscow Region
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Funding: Rosatom, contract Н.4е.45.03.10.1027
IHEP participates in the development of superconducting fast-cycling magnets for the FAIR project. In the frame of this project IHEP has developed a prototype of the main quadrupole, assigned for using in the SIS300 ring. The main parameters of the quadrupole are: 45-T/m central gradient in 125-mm ID of the coil with the useful aperture of 105 mm; the gradient ramp rate is 10 T/m/c and the length of the prototype is 1 m. The main characteristics of the designed quadrupole magnet are discussed here. The correction system consists of multipole magnets, resonance and chromaticity sextupoles and steering dipoles. The multipole magnet contains octupole, sextupole and quadrupole coils and the steering magnet involves horizontal and vertical dipoles. Geometries of corrector and steering magnets are presented as well as their main magnetic parameters.
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Slides
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| THCHC03 |
Cooling System of the SIS300 Accelerator
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dipole, cryogenics, quadrupole, superconducting-magnet |
303 |
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- S. Zinchenko, A. I. Ageev, S. Kozub, V. Zubko
IHEP Protvino, Protvino, Moscow Region
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The Facility for Antiprotons and Ion Research (FAIR) being under construction in Germany as an international project is a cascade of accelerators; two last accelerators from this cascade will be made with the use of superconducting magnets. The large volume of the executed work on the SIS300 superconductive equipment allowed to start the estimation of the basic parameters of SIS300 cooling system. On the base of many research notes and calculations the item-by-item heat load budget at the helium temperature level is composed. Cooling system flow diagram is proposed, the calculated single phase helium temperature profiles along the string of magnets are presented and discussed. Helium flow pressure drop along the string of magnets during cooling down is calculated on the basis of "temperature wave" model and cooling down time of the accelerator is estimated.
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Slides
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