RuPAC2016 - List of Keywords (shielding)

Paper	Title	Other Keywords	Page
WECDMH03	A 5 to 20 MeV Electron Linear Accelerator for Metrology	electron, radiation, vacuum, target	102
	Yu. Zuev, Z. Andreeva, M.A. Kalinichenko, A.P. Klinov, A.S. Krestianinov, O.L. Maslennikov, A.V. Tanchuk, V.V. Terentyev NIIEFA, St. Petersburg, Russia S.G. Trofimchuk, I.I. Tsvetkov VNIIM, St.Petersburg, Russia
	The paper outlines design parameters and construction features of an electron linear accelerator to be operated in the D.I.Mendeleyev Institute for Metrology (VNIIM). The accelerator system is intended to form electron and bremsstrahlung radiation fields of variable intensity. This shall extend characteristics of the National measurement standard to be used for calibration of a space monitoring equipment, embedded measuring means for industrial accelerator facilities and others. The accelerator system consists of an electron source, resonance accelerating structure, beam-bending magnet'separator and radiation head with a block of bremsstrahlung targets, foils and collimators. An important feature of the system is spatial steadiness of radiation field at energies varied from 5 to 20 MeV and more than tenfold variation of the accelerated particle current. The status of the project will be presented as well.
	Slides WECDMH03 [9.654 MB]
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THPSC006	Simulation of Precision Magnetic Shielding System for Beam Injectors in Tokamaks	plasma, operation, simulation, ion	550
	A.M. Bazarov, V.M. Amoskov, V.A. Belyakov, E.I. Gapionok, V.P. Kukhtin, E.A. Lamzin, S.E. Sytchevsky NIIEFA, St. Petersburg, Russia V.A. Belyakov, S.E. Sytchevsky Saint Petersburg State University, Saint Petersburg, Russia Y. Gribov ITER Organization, St. Paul lez Durance, France
	Beam injectors in tokamaks are utilized for plasma heating and diagnostics. Due to the relatively large distance between the injectors and plasma, the tokamak stray magnetic field inside injectors during the operation should be very low (down to the tenths of Gauss) to avoid the deflection of the ion beams. The Magnetic Field Reduction System (MFRS) should be used to reduce the stray magnetic field produced by the tokamak EM systems and plasma to an acceptable level inside the injectors. In total, the complex MFRS can consist of a passive magnetic shield and active coils to provide the strict design criteria during a plasma scenario. To provide precise computations, detailed numerical models of MFRS should have the dimensions up to several tens of millions of degrees of freedom. Such problem could be solved only with the use of high-efficiency vector algorithms and parallel computations. The paper is dedicated to simulation of MFRS for beam injectors in tokamaks.
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THPSC007	Modeling Magnetic Effects of Steel Rebar of Concrete Surroundings for Electrophysical Apparatus	plasma, simulation, experiment, operation	553
	V.M. Amoskov, A.M. Bazarov, V.A. Belyakov, M. Kaparkova, V.P. Kukhtin, E.A. Lamzin, B.V. Lyublin, S.E. Sytchevsky NIIEFA, St. Petersburg, Russia V.A. Belyakov, S.E. Sytchevsky Saint Petersburg State University, Saint Petersburg, Russia Y. Gribov ITER Organization, St. Paul lez Durance, France
	Large electrophysical apparatus (accelerators, detectors, tokamaks, stellarators) usually produce strong magnetic fields, which magnetizing surrounding ferromagnetics (steel masses). For example, concrete structures of buildings are reinforced with steel rebar that can produce a local substantial contribution into the magnetic field in the area where the service staff and magnetically sensitive equipment is located. The article describes an advanced approach to modelling magnetic properties of reinforced concrete structures taking into account the anisotropic effect due to rod layers orientations. The equivalent model has been validated in the computation of a test problem. For comparison, simulations have been carried out with a detailed 3D FE model that describes each of the steel rods. The equivalent model has required a few times less finite elements than the detailed model. A comparison of the fields obtained has demonstrated a very good match, even for the distances comparable with the rebar rod gaps.
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Paper

Title

Other Keywords

Page

WECDMH03

A 5 to 20 MeV Electron Linear Accelerator for Metrology

electron, radiation, vacuum, target

102

Yu. Zuev, Z. Andreeva, M.A. Kalinichenko, A.P. Klinov, A.S. Krestianinov, O.L. Maslennikov, A.V. Tanchuk, V.V. Terentyev
NIIEFA, St. Petersburg, Russia
S.G. Trofimchuk, I.I. Tsvetkov
VNIIM, St.Petersburg, Russia

The paper outlines design parameters and construction features of an electron linear accelerator to be operated in the D.I.Mendeleyev Institute for Metrology (VNIIM). The accelerator system is intended to form electron and bremsstrahlung radiation fields of variable intensity. This shall extend characteristics of the National measurement standard to be used for calibration of a space monitoring equipment, embedded measuring means for industrial accelerator facilities and others. The accelerator system consists of an electron source, resonance accelerating structure, beam-bending magnet'separator and radiation head with a block of bremsstrahlung targets, foils and collimators. An important feature of the system is spatial steadiness of radiation field at energies varied from 5 to 20 MeV and more than tenfold variation of the accelerated particle current. The status of the project will be presented as well.

Slides WECDMH03 [9.654 MB]

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reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

THPSC006

Simulation of Precision Magnetic Shielding System for Beam Injectors in Tokamaks

plasma, operation, simulation, ion

550

A.M. Bazarov, V.M. Amoskov, V.A. Belyakov, E.I. Gapionok, V.P. Kukhtin, E.A. Lamzin, S.E. Sytchevsky
NIIEFA, St. Petersburg, Russia
V.A. Belyakov, S.E. Sytchevsky
Saint Petersburg State University, Saint Petersburg, Russia
Y. Gribov
ITER Organization, St. Paul lez Durance, France

Beam injectors in tokamaks are utilized for plasma heating and diagnostics. Due to the relatively large distance between the injectors and plasma, the tokamak stray magnetic field inside injectors during the operation should be very low (down to the tenths of Gauss) to avoid the deflection of the ion beams. The Magnetic Field Reduction System (MFRS) should be used to reduce the stray magnetic field produced by the tokamak EM systems and plasma to an acceptable level inside the injectors. In total, the complex MFRS can consist of a passive magnetic shield and active coils to provide the strict design criteria during a plasma scenario. To provide precise computations, detailed numerical models of MFRS should have the dimensions up to several tens of millions of degrees of freedom. Such problem could be solved only with the use of high-efficiency vector algorithms and parallel computations. The paper is dedicated to simulation of MFRS for beam injectors in tokamaks.

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reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

THPSC007

Modeling Magnetic Effects of Steel Rebar of Concrete Surroundings for Electrophysical Apparatus

plasma, simulation, experiment, operation

553

V.M. Amoskov, A.M. Bazarov, V.A. Belyakov, M. Kaparkova, V.P. Kukhtin, E.A. Lamzin, B.V. Lyublin, S.E. Sytchevsky
NIIEFA, St. Petersburg, Russia
V.A. Belyakov, S.E. Sytchevsky
Saint Petersburg State University, Saint Petersburg, Russia
Y. Gribov
ITER Organization, St. Paul lez Durance, France

Large electrophysical apparatus (accelerators, detectors, tokamaks, stellarators) usually produce strong magnetic fields, which magnetizing surrounding ferromagnetics (steel masses). For example, concrete structures of buildings are reinforced with steel rebar that can produce a local substantial contribution into the magnetic field in the area where the service staff and magnetically sensitive equipment is located. The article describes an advanced approach to modelling magnetic properties of reinforced concrete structures taking into account the anisotropic effect due to rod layers orientations. The equivalent model has been validated in the computation of a test problem. For comparison, simulations have been carried out with a detailed 3D FE model that describes each of the steel rods. The equivalent model has required a few times less finite elements than the detailed model. A comparison of the fields obtained has demonstrated a very good match, even for the distances comparable with the rebar rod gaps.

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)