RuPAC2016 - List of Keywords (resonance)

Paper	Title	Other Keywords	Page
WECAMH01	Some Problems of the Beam Extraction from Circular Accelerators	extraction, controls, injection, booster	61
	S.N. Andrianov St. Petersburg State University, St. Petersburg, Russia N.S. Edamenko Saint Petersburg State University, Saint Petersburg, Russia
	In this article some problems of optimizing the output beam of particles from the circular accelerator are discussed. In particular, we consider some problems of matching the booster, Nuclotron and collider in the NICA project. The main attention is paid to the matching of the extraction beam systems. The proposed approach allows providing qualitative and quantitative analysis of the impact of various factors of the corresponding control systems.
	Slides WECAMH01 [1.912 MB]
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WEZMH01	Spallation Neutron Source at the 1 Gev Synchrocyclotron of PNPI	neutron, proton, target, experiment	90
	O.A. Shcherbakov, E.M. Ivanov, G.F. Mikheev, G.A. Petrov, G.A. Riabov, A.S. Vorobyev PNPI, Gatchina, Leningrad District, Russia
	A description of the spallation pulsed neutron source and neutron time-of-flight spectrometer GNEIS based on the 1 GeV proton synchrocyclotron of PNPI in Gatchina is presented. The main parameters of the neutron source and GNEIS are given in comparison with the analogous world-class facilities. The experimental capabilities of the GNEIS are demonstrated by the examples of some nuclear physics and applied research experiments carried out during four decades of its operation.
	Slides WEZMH01 [32.810 MB]
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FRCAMH08	Dynamic Aperture Optimization of the NICA Collider	octupole, quadrupole, lattice, dynamic-aperture	169
	S.A. Glukhov, E.B. Levichev BINP SB RAS, Novosibirsk, Russia
	NICA is a proton and heavy ion collider being built at JINR in Dubna, Russia. It was shown that nonlinear quadrupole fringe fields are among the main factors limiting dynamic aperture of the machine. In the present paper the following ways of dynamic aperture optimization were studied: betatron tunes optimization and placing octupole lenses to the lattice to compensate fringe fields' effect.
	Slides FRCAMH08 [2.480 MB]
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TUCASH06	Progress in CW Mode Electron Resonance Accelerator BETA-8 Development	electron, cavity, operation, power-supply	185
	A.V. Telnov VNIIEF, Sarov, Russia
	This paper presents the status of powerful linear electron accelerator BETA-8 development. The accelerator is operating in CW mode and used for ionizing radiation research. The basic constituent of accelerator is coaxial half-wave resonator excited on T1 wave. Required electron beam energy is attained by multiple passing through central transversal plane of resonator. Electron beam iterative passing is realized by turning magnets located on resonator outwalls. The main parameters of the accelerator are: beam output energy 1.5 - 7.5 MeV, average power up to 300 kW, operating frequency 100 MHz. By now the main components of facility, namely, coaxial resonator, three HF generator units each with output power 180 kW, HF power summation device, the unit of power input (UPI) designed to transfer HF signal of 600 kW have been designed and manufactured. Electron beam transport system project consisting of up to five full sequential passes through accelerating resonator has been developed. Turning electromagnets have been designed and manufactured. HF parameters measurements for coaxial resonator assembled with UPI have been realized at low HF power level. All HF generator units and HF power summation devices have been tested. HF electron injector has been designed, manufactured and tested. The accelerator testing is supposed to be carried out in one HF generator unit supply mode.
	Slides TUCASH06 [2.798 MB]
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TUCASH07	HF Structure of BETA-8 Electron Resonance Accelerator	cavity, electron, feedback, coupling	188
	M.L. Smetanin VNIIEF, Sarov, Russia
	BETA-8 is new powerful resonance electron accelerator designed in RFNC-VNIIEF to operate in continuous wave generating regime. The basic constituent of accelerator is half-wave coaxial resonator excited at T1 wave. The work presents the main approaches to numerical modeling of accelerator HF power system components. The results of computation of accelerating resonator with operating frequency of 100 MHz and inductive unit of HF power input (UPI) designed to transmit continuous HF signal at operating frequency with mean power level of 600 kW are reported. The transmitting coaxial waveguide connecting UPI with feeding HF generator has been computed, designed and manufactured. The calculated results have been tested by measurements of HF parameters of the resonator assembled with UPI and connecting waveguide. The possibility to locate indicating loop (a detector working in frequency feedback circuit of feeding HF generator) in transmitting feeder has been demonstrated. The method of calibration computation of measuring inductive loop that is an element of amplitude feedback circuit of HF generator is presented. The dual matched load necessary for preliminary adjustment of operating modes of feeding HF generator unit (with mean power up to 180 kW) and technological systems of accelerating complex has been computed, designed and put into operation.
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TUPSA030	Regulation of the Waveguide Coupling Factor of Standing Wave Linear Accelerator	coupling, insertion, cavity, electron	279
	D.S. Yurov MSU, Moscow, Russia V.I. Shvedunov LEA MSU, Moscow, Russia V.I. Shvedunov SINP MSU, Moscow, Russia
	Regulation of the waveguide coupling factor of standing wave linear accelerator allows to adjust the value of accelerated current, keeping the reflected RF power close to zero. This ensures the most efficient use of RF energy and absence of overvoltage in the waveguide elements. The paper presents studies results for various methods of coupling factors regulation with continuous wave (CW) normal conducting linear accelerator used as an example. The results of calculations and measurements on the mock-up of the accelerating structure are presented.
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TUPSA052	First Order Perturbation Theory Evaluation of Initial Stage of Self Amplified Crystal-Based X-Ray Emission	electron, radiation, electromagnetic-fields, undulator	325
	A.I. Benediktovitch BSU, Minsk, Belarus, Belarus
	X-ray Free Electron Lasers open new revolutionary opportunities for investigations in materials science, chemistry, biology and other areas. However, due to high cost of construction and maintain, the access to these facilities for wide scientific community is quite limited. This motivates search for schemes of compact bright x-ray sources. The size of X-ray Free Electron Lasers is dictated by basic properties of undulator radiation: to produce x-rays with Angstrom wavelength from cm period undulator one needs electrons with energy in GeV range. If one considers the radiation mechanisms accompanying the propagation of electron beam through a crystal structure (channeling radiation, parametric x-ray radiation, Cherenkov radiation near K-edge), one can see that to get photons in x-ray range one needs electrons with energy of tens to hundreds MeV. One of the ways to get bright x-ray source based on crystal-assisted radiation mechanisms is to run the electrons in coherent radiation regime based on self amplified spontaneous emission (SASE). In the present contribution we will discuss under which conditions the SASE can start in the case of crystal-assisted radiation mechanisms. To investigate the initial stage of SASE process we use the first-order perturbation theory that enables to describe the collective beam response as effective susceptibility. Based on this approach we will analyze which experimental geometry would promising for the SASE process onset.
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WEPSB026	Dynamical Aperture Beyond Perturbations: From Qualitative Analysis to Maps	background, multipole, controls, dynamic-aperture	419
	A.N. Fedorova, M.G. Zeitlin RAS/IPME, St. Petersburg, Russia
	We start with a qualitative approach based on the detailed analysis of smoothness classes of the underlying functional spaces provided possible evaluation of the dynamical aperture in general nonlinear/polynomial models of particle/beam motion in accelerators. We present the applications of discrete multiresolution analysis technique to the maps which arise as the invariant discretization of continuous nonlinear polynomial problems. It provides a generalization of the machinery of local nonlinear harmonic analysis, which can be applied for both discrete and continuous cases and allows to construct the explicit multiresolution decomposition for solutions of discrete problems which are the correct discretizations of the corresponding continuous cases.
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WEPSB028	Computer Simulation of the Slow Beam Extraction From Nuclotron	sextupole, extraction, dipole, lattice	422
	A.D. Kovalenko, I.L. Avvakumova JINR/VBLHEP, Moscow, Russia A.D. Kovalenko, V.A. Mikhaylov JINR, Dubna, Moscow Region, Russia
	The results of modelling of ion's motion during beam slow extraction from Nuclotron at the energy 6 GeV/Amu are shown in this work. Influence of sextupole field component of dipole magnets and fringe fields of Lambertson's magnets on the characteristics of extracted beam was analyzed. The calculations have been done via MadX. * Issinsky I., Mikhaylov V., Shchepunov V. Nuclotron lattice. Proceedings of EPAC 1990, p.458. Kovalenko A. Nuclotron: status and future. Proceedings of EPAC 2000, p.554. * Agapov N. et al. Slow beam extraction from Nuclotron. Proceedings of the 2001 Particle Accelerator Conference, p.1646.
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THPSC004	Measuring System for FLNR Cyclotrons Magnetic Field Formation	cyclotron, controls, acceleration, interface	544
	I.A. Ivanenko, V. Aleinikov, G.N. Ivanov JINR, Dubna, Moscow Region, Russia V.V. Konstantinov JINR/FLNR, Moscow region, Russia
	Since beginning of millennium, three new heavy-ion isochronous cyclotrons, DC72, DC60 and DC110, were created in FLNR, JINR. At the present time the activities on creation of the new cyclotron DC280 for Super Heavy Facility are carried out. The one of the main problem of cyclotron creation is a formation of the isochronous magnetic field. The FLNR measuring system bases on Holl probes and provide the measuring accuracy 10^-4. The paper presents the features, measuring and exploitation results of FLNR cyclotrons magnetic field formation.
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Paper

Title

Other Keywords

Page

WECAMH01

Some Problems of the Beam Extraction from Circular Accelerators

extraction, controls, injection, booster

61

S.N. Andrianov
St. Petersburg State University, St. Petersburg, Russia
N.S. Edamenko
Saint Petersburg State University, Saint Petersburg, Russia

In this article some problems of optimizing the output beam of particles from the circular accelerator are discussed. In particular, we consider some problems of matching the booster, Nuclotron and collider in the NICA project. The main attention is paid to the matching of the extraction beam systems. The proposed approach allows providing qualitative and quantitative analysis of the impact of various factors of the corresponding control systems.

Slides WECAMH01 [1.912 MB]

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

WEZMH01

Spallation Neutron Source at the 1 Gev Synchrocyclotron of PNPI

neutron, proton, target, experiment

90

O.A. Shcherbakov, E.M. Ivanov, G.F. Mikheev, G.A. Petrov, G.A. Riabov, A.S. Vorobyev
PNPI, Gatchina, Leningrad District, Russia

A description of the spallation pulsed neutron source and neutron time-of-flight spectrometer GNEIS based on the 1 GeV proton synchrocyclotron of PNPI in Gatchina is presented. The main parameters of the neutron source and GNEIS are given in comparison with the analogous world-class facilities. The experimental capabilities of the GNEIS are demonstrated by the examples of some nuclear physics and applied research experiments carried out during four decades of its operation.

Slides WEZMH01 [32.810 MB]

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

FRCAMH08

Dynamic Aperture Optimization of the NICA Collider

octupole, quadrupole, lattice, dynamic-aperture

169

S.A. Glukhov, E.B. Levichev
BINP SB RAS, Novosibirsk, Russia

NICA is a proton and heavy ion collider being built at JINR in Dubna, Russia. It was shown that nonlinear quadrupole fringe fields are among the main factors limiting dynamic aperture of the machine. In the present paper the following ways of dynamic aperture optimization were studied: betatron tunes optimization and placing octupole lenses to the lattice to compensate fringe fields' effect.

Slides FRCAMH08 [2.480 MB]

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TUCASH06

Progress in CW Mode Electron Resonance Accelerator BETA-8 Development

electron, cavity, operation, power-supply

185

A.V. Telnov
VNIIEF, Sarov, Russia

This paper presents the status of powerful linear electron accelerator BETA-8 development. The accelerator is operating in CW mode and used for ionizing radiation research. The basic constituent of accelerator is coaxial half-wave resonator excited on T1 wave. Required electron beam energy is attained by multiple passing through central transversal plane of resonator. Electron beam iterative passing is realized by turning magnets located on resonator outwalls. The main parameters of the accelerator are: beam output energy 1.5 - 7.5 MeV, average power up to 300 kW, operating frequency 100 MHz. By now the main components of facility, namely, coaxial resonator, three HF generator units each with output power 180 kW, HF power summation device, the unit of power input (UPI) designed to transfer HF signal of 600 kW have been designed and manufactured. Electron beam transport system project consisting of up to five full sequential passes through accelerating resonator has been developed. Turning electromagnets have been designed and manufactured. HF parameters measurements for coaxial resonator assembled with UPI have been realized at low HF power level. All HF generator units and HF power summation devices have been tested. HF electron injector has been designed, manufactured and tested. The accelerator testing is supposed to be carried out in one HF generator unit supply mode.

Slides TUCASH06 [2.798 MB]

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TUCASH07

HF Structure of BETA-8 Electron Resonance Accelerator

cavity, electron, feedback, coupling

188

M.L. Smetanin
VNIIEF, Sarov, Russia

BETA-8 is new powerful resonance electron accelerator designed in RFNC-VNIIEF to operate in continuous wave generating regime. The basic constituent of accelerator is half-wave coaxial resonator excited at T1 wave. The work presents the main approaches to numerical modeling of accelerator HF power system components. The results of computation of accelerating resonator with operating frequency of 100 MHz and inductive unit of HF power input (UPI) designed to transmit continuous HF signal at operating frequency with mean power level of 600 kW are reported. The transmitting coaxial waveguide connecting UPI with feeding HF generator has been computed, designed and manufactured. The calculated results have been tested by measurements of HF parameters of the resonator assembled with UPI and connecting waveguide. The possibility to locate indicating loop (a detector working in frequency feedback circuit of feeding HF generator) in transmitting feeder has been demonstrated. The method of calibration computation of measuring inductive loop that is an element of amplitude feedback circuit of HF generator is presented. The dual matched load necessary for preliminary adjustment of operating modes of feeding HF generator unit (with mean power up to 180 kW) and technological systems of accelerating complex has been computed, designed and put into operation.

Export •

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

TUPSA030

Regulation of the Waveguide Coupling Factor of Standing Wave Linear Accelerator

coupling, insertion, cavity, electron

279

D.S. Yurov
MSU, Moscow, Russia
V.I. Shvedunov
LEA MSU, Moscow, Russia
V.I. Shvedunov
SINP MSU, Moscow, Russia

Regulation of the waveguide coupling factor of standing wave linear accelerator allows to adjust the value of accelerated current, keeping the reflected RF power close to zero. This ensures the most efficient use of RF energy and absence of overvoltage in the waveguide elements. The paper presents studies results for various methods of coupling factors regulation with continuous wave (CW) normal conducting linear accelerator used as an example. The results of calculations and measurements on the mock-up of the accelerating structure are presented.

Export •

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

TUPSA052

First Order Perturbation Theory Evaluation of Initial Stage of Self Amplified Crystal-Based X-Ray Emission

electron, radiation, electromagnetic-fields, undulator

325

A.I. Benediktovitch
BSU, Minsk, Belarus, Belarus

X-ray Free Electron Lasers open new revolutionary opportunities for investigations in materials science, chemistry, biology and other areas. However, due to high cost of construction and maintain, the access to these facilities for wide scientific community is quite limited. This motivates search for schemes of compact bright x-ray sources. The size of X-ray Free Electron Lasers is dictated by basic properties of undulator radiation: to produce x-rays with Angstrom wavelength from cm period undulator one needs electrons with energy in GeV range. If one considers the radiation mechanisms accompanying the propagation of electron beam through a crystal structure (channeling radiation, parametric x-ray radiation, Cherenkov radiation near K-edge), one can see that to get photons in x-ray range one needs electrons with energy of tens to hundreds MeV. One of the ways to get bright x-ray source based on crystal-assisted radiation mechanisms is to run the electrons in coherent radiation regime based on self amplified spontaneous emission (SASE). In the present contribution we will discuss under which conditions the SASE can start in the case of crystal-assisted radiation mechanisms. To investigate the initial stage of SASE process we use the first-order perturbation theory that enables to describe the collective beam response as effective susceptibility. Based on this approach we will analyze which experimental geometry would promising for the SASE process onset.

Export •

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

WEPSB026

Dynamical Aperture Beyond Perturbations: From Qualitative Analysis to Maps

background, multipole, controls, dynamic-aperture

419

A.N. Fedorova, M.G. Zeitlin
RAS/IPME, St. Petersburg, Russia

We start with a qualitative approach based on the detailed analysis of smoothness classes of the underlying functional spaces provided possible evaluation of the dynamical aperture in general nonlinear/polynomial models of particle/beam motion in accelerators. We present the applications of discrete multiresolution analysis technique to the maps which arise as the invariant discretization of continuous nonlinear polynomial problems. It provides a generalization of the machinery of local nonlinear harmonic analysis, which can be applied for both discrete and continuous cases and allows to construct the explicit multiresolution decomposition for solutions of discrete problems which are the correct discretizations of the corresponding continuous cases.

Export •

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

WEPSB028

Computer Simulation of the Slow Beam Extraction From Nuclotron

sextupole, extraction, dipole, lattice

422

A.D. Kovalenko, I.L. Avvakumova
JINR/VBLHEP, Moscow, Russia
A.D. Kovalenko, V.A. Mikhaylov
JINR, Dubna, Moscow Region, Russia

The results of modelling of ion's motion during beam slow extraction from Nuclotron at the energy 6 GeV/Amu are shown in this work. Influence of sextupole field component of dipole magnets and fringe fields of Lambertson's magnets on the characteristics of extracted beam was analyzed. The calculations have been done via MadX.
* Issinsky I., Mikhaylov V., Shchepunov V. Nuclotron lattice. Proceedings of EPAC 1990, p.458.
** Kovalenko A. Nuclotron: status and future. Proceedings of EPAC 2000, p.554.
*** Agapov N. et al. Slow beam extraction from Nuclotron. Proceedings of the 2001 Particle Accelerator Conference, p.1646.

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

THPSC004

Measuring System for FLNR Cyclotrons Magnetic Field Formation

cyclotron, controls, acceleration, interface

544

I.A. Ivanenko, V. Aleinikov, G.N. Ivanov
JINR, Dubna, Moscow Region, Russia
V.V. Konstantinov
JINR/FLNR, Moscow region, Russia

Since beginning of millennium, three new heavy-ion isochronous cyclotrons, DC72, DC60 and DC110, were created in FLNR, JINR. At the present time the activities on creation of the new cyclotron DC280 for Super Heavy Facility are carried out. The one of the main problem of cyclotron creation is a formation of the isochronous magnetic field. The FLNR measuring system bases on Holl probes and provide the measuring accuracy 10^-4. The paper presents the features, measuring and exploitation results of FLNR cyclotrons magnetic field formation.

Export •

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