HB2016 - List of Keywords (dipole)

Paper	Title	Other Keywords	Page
MOPR002	Study on the Magnetic Measurement Results of the Injection System for CSNS/RCS	injection, septum, power-supply, neutron	46
	M.Y. Huang, S. Fu, N. Huang, L. Huo, H.F. Ji, W. Kang, Y.Q. Liu, J. Peng, J. Qiu, L. Shen, S. Wang, X. Wu, S.Y. Xu, J. Zhang, G.Z. Zhou IHEP, Beijing, People's Republic of China
	Funding: Work supported by National Natural Science Foundation of China (11205185) A combination of the H⁻ stripping and phase space painting method is used to accumulate a high intensity beam in the Rapid Cycling Synchrotron (RCS) of the China Spallation Neutron Source (CSNS). The injection system for CSNS/RCS consists of three kinds of magnets: four direct current magnets (BC1-BC4), eight alternating current magnets (BH1-BH4 and BV1-BV4), two septum magnets (ISEP1 and ISEP2). In this paper, the magnetic measurements of the injection system were introduced and the data analysis was processed. The field uniformity and magnetizing curves of these magnets were given, and then the magnetizing fitting equations were obtained.
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MOPR004	H⁻ Charge Exchange Injection for XiPAF Synchrotron	injection, proton, emittance, synchrotron	49
	H.J. Yao, X. Guan, G.R. Li, X.W. Wang, Q.Z. Xing, S.X. Zheng TUB, Beijing, People's Republic of China
	The physics design of the H⁻ charge exchange injection system for Xi’an Proton Application Facility (XiPAF) synchrotron with the missing dipole lattice is discussed. The injection scheme is composed of one septum magnet, three chicane dipoles, two bump magnets and one carbon stripping foil. A 7 μg/cm² carbon foil is chosen for 7 MeV H⁻ beam for high stripping efficiency and low coulomb scattering effect. The simulation results of the horizontal and vertical phase space painting finished by two bumper magnets and mismatching respectively are presented.
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MOPR008	Pressure Profiles Calculation for the CSRm and BRing	ion, vacuum, heavy-ion, simulation	62
	P. Li, Z. Chai, Z. Dong, X.C. Kang, M. Li, S. Li, W.L. Li, C.L. Luo, R.S. Mao, J. Meng, J.C. Yang, Y.J. Yuan, W.H. Zheng IMP/CAS, Lanzhou, People's Republic of China
	Funding: National Natural Science Foundation of China (Project No. 11305227) A new large scale accelerator facility is being designed by Institute of Modern Physics (IMP) Lanzhou, which is named as the High Intensity heavy-ion Accelerator Facility (HIAF). This project consists of ion sources, Linac accelerator, synchrotrons (BRing) and several experimental terminals. During the operation of Bring, the heavy ion beams will be easily lost at the vacuum chamber along the BRing when it is used to accumulate intermediate charge state particles. The vacuum pressure bump due to the ion-induced desorption in turn leads to an increase in beam loss rate. In order to accumulate the beams to higher intensity to fulfill the requirements of physics experiments and for better understanding of the dynamic vacuum pressure caused by the beam loss, a dynamic vacuum pressure simulation program has been developed. Vacuum pressure profiles are calculated and compared with the measured data based on the current synchrotron (CSRm). Then the static vacuum pressure profiles of the BRing and one type of pump which will be used in the BRing are introduced in this paper.
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MOPR014	Corrector Magnets for the CBETA and eRHIC Projects and Other Hadron Facilities*	quadrupole, electron, permanent-magnet, hadron	87
	N. Tsoupas, S.J. Brooks, A.K. Jain, F. Méot, V. Ptitsyn, D. Trbojevic BNL, Upton, Long Island, New York, USA
	Funding: Work supported by the U.S. Department of Energy under contract DE- SC0012704. The Cbeta project[1] is a prototype electron accelerator for the proposed eRHIC project[2]. The electron accelerator is based on the Energy Recovery Linac (ERL) and the Fixed Field Alternating Gradient (FFAG) principles. The FFAG arcs of the accelerator are comprised of one focusing and one defocusing quadrupoles which are designed as Halbach-type permanent magnet quadrupoles[3]. We propose window frame electro-magnets surrounding the Halbach magnets to be used as normal and skew dipoles correctors and quadrupole correctors. We will present results from OPERA-3D calculations of the effect of these corrector magnets on the magnetic field of the main quadrupole magnets and the results will be compared with experimental measurements. We will also discuss applications of permanent magnets with such correctors for hadron beam facilities. [1] http://arxiv.org/abs/1504.00588 [2] http://arxiv.org/ftp/arxiv/papers/1409/1409.1633.pdf [3] K. Halbach, NIM 169 (1980) pp. 1-10
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MOPL009	Analytical Approach for Achromatic Structure Study and Design	quadrupole, emittance, cyclotron, factory	203
	H.Y. Barminova MEPhI, Moscow, Russia A.S. Chikhachev Allrussian Electrotechnical Institute, Moskow, Russia
	The analytical approach is proposed to study the various achromatic structures. The method is based on the self-consistent time-dependent models, which allow to describe the dynamics of both continuous and bunched beam in external magnetic fields. The fully kinetic models are implemented in this approach. The kinetic distribution functions dependent on the motion integrals allow to obtain accurate Vlasov equation solutions as KV-model does it. The method allows to solve the envelope equation both analytically and by ODE system numerical integration, and to predict the beam phase portrait behavior in magnetic fields of the structure. The advantages of the method are the possibility of easy scaling and the wide physical generality, which is important for the multi-parameter problem of the high-intensity high-brightness beam formation. The results of the method application for the bending magnets and the quadrupoles are presented.
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MOPL024	Study of Magnets Sorting of the CSNS/RCS Dipoles and Quadrupoles*	quadrupole, closed-orbit, injection, lattice	247
	Y.W. An, H.F. Ji, Y. Li, S. Wang, S.Y. Xu IHEP, Beijing, People's Republic of China J. Peng CSNS, Guangdong Province, People's Republic of China
	Funding: Work supported by National Natural Science Foundation of China (11405189)* The Rapid Cycling Synchrotron plays an important role in the China Spallation Neutron Source. RCS accumulates and accelerates the proton beams from 80MeV to 1.6GeV for striking the target with the repetition rate of 25Hz. RCS demands low uncontrolled loss for hands on maintenance, and one needs a tight tolerance on magnet field accuracy. Magnet sorting can be done to minimize linear effects of beam dynamics. Using closed-orbit distortion (COD) and beta-beating independently as the merit function, and considering maintaining the symmetry of the lattice, a code based on traversal algorithm is developed to get the dipoles and quadrupoles sorting for CSNS/RCS. The comparison of beam distribution, collimation efficiency and beam loss are also investigated according to beam injection and beam accelerating.
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TUPM5Y01	ESS Linac Plans for Commissioning and Initial Operations	linac, rfq, target, quadrupole	342
	R. Miyamoto, M. Eshraqi, M. Muñoz ESS, Lund, Sweden
	Beam commissioning of the proton linac of the European Spallation Source (ESS) is planned to be conducted in 2018 and 2019. At this stage, the last 21 cryomodules are not yet installed and the maximum beam energy and power are 570 MeV and 1.4 MW, with respect to the nominal 2 GeV and 5 MW. The linac will be operated in this condition until the remaining cyromodules are installed in two stages in 2021 and 2022. On top of the common challenges of beam dynamics and machine protection, commissioning of a large scale machine, such as the ESS linac within a relatively short integrated time of less than 40 weeks imposes an additional challenge to the scheduling and planning. This paper lays out the current plans of the ESS linac for its beam commissioning as well as the initial operation.
	Slides TUPM5Y01 [3.651 MB]
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Paper

Title

Other Keywords

Page

MOPR002

Study on the Magnetic Measurement Results of the Injection System for CSNS/RCS

injection, septum, power-supply, neutron

46

M.Y. Huang, S. Fu, N. Huang, L. Huo, H.F. Ji, W. Kang, Y.Q. Liu, J. Peng, J. Qiu, L. Shen, S. Wang, X. Wu, S.Y. Xu, J. Zhang, G.Z. Zhou
IHEP, Beijing, People's Republic of China

Funding: Work supported by National Natural Science Foundation of China (11205185)
A combination of the H⁻ stripping and phase space painting method is used to accumulate a high intensity beam in the Rapid Cycling Synchrotron (RCS) of the China Spallation Neutron Source (CSNS). The injection system for CSNS/RCS consists of three kinds of magnets: four direct current magnets (BC1-BC4), eight alternating current magnets (BH1-BH4 and BV1-BV4), two septum magnets (ISEP1 and ISEP2). In this paper, the magnetic measurements of the injection system were introduced and the data analysis was processed. The field uniformity and magnetizing curves of these magnets were given, and then the magnetizing fitting equations were obtained.

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MOPR004

H⁻ Charge Exchange Injection for XiPAF Synchrotron

injection, proton, emittance, synchrotron

49

H.J. Yao, X. Guan, G.R. Li, X.W. Wang, Q.Z. Xing, S.X. Zheng
TUB, Beijing, People's Republic of China

The physics design of the H⁻ charge exchange injection system for Xi’an Proton Application Facility (XiPAF) synchrotron with the missing dipole lattice is discussed. The injection scheme is composed of one septum magnet, three chicane dipoles, two bump magnets and one carbon stripping foil. A 7 μg/cm² carbon foil is chosen for 7 MeV H⁻ beam for high stripping efficiency and low coulomb scattering effect. The simulation results of the horizontal and vertical phase space painting finished by two bumper magnets and mismatching respectively are presented.

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

MOPR008

Pressure Profiles Calculation for the CSRm and BRing

ion, vacuum, heavy-ion, simulation

62

P. Li, Z. Chai, Z. Dong, X.C. Kang, M. Li, S. Li, W.L. Li, C.L. Luo, R.S. Mao, J. Meng, J.C. Yang, Y.J. Yuan, W.H. Zheng
IMP/CAS, Lanzhou, People's Republic of China

Funding: National Natural Science Foundation of China (Project No. 11305227)
A new large scale accelerator facility is being designed by Institute of Modern Physics (IMP) Lanzhou, which is named as the High Intensity heavy-ion Accelerator Facility (HIAF). This project consists of ion sources, Linac accelerator, synchrotrons (BRing) and several experimental terminals. During the operation of Bring, the heavy ion beams will be easily lost at the vacuum chamber along the BRing when it is used to accumulate intermediate charge state particles. The vacuum pressure bump due to the ion-induced desorption in turn leads to an increase in beam loss rate. In order to accumulate the beams to higher intensity to fulfill the requirements of physics experiments and for better understanding of the dynamic vacuum pressure caused by the beam loss, a dynamic vacuum pressure simulation program has been developed. Vacuum pressure profiles are calculated and compared with the measured data based on the current synchrotron (CSRm). Then the static vacuum pressure profiles of the BRing and one type of pump which will be used in the BRing are introduced in this paper.

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MOPR014

Corrector Magnets for the CBETA and eRHIC Projects and Other Hadron Facilities*

quadrupole, electron, permanent-magnet, hadron

87

N. Tsoupas, S.J. Brooks, A.K. Jain, F. Méot, V. Ptitsyn, D. Trbojevic
BNL, Upton, Long Island, New York, USA

Funding: Work supported by the U.S. Department of Energy under contract DE- SC0012704.
The Cbeta project[1] is a prototype electron accelerator for the proposed eRHIC project[2]. The electron accelerator is based on the Energy Recovery Linac (ERL) and the Fixed Field Alternating Gradient (FFAG) principles. The FFAG arcs of the accelerator are comprised of one focusing and one defocusing quadrupoles which are designed as Halbach-type permanent magnet quadrupoles[3]. We propose window frame electro-magnets surrounding the Halbach magnets to be used as normal and skew dipoles correctors and quadrupole correctors. We will present results from OPERA-3D calculations of the effect of these corrector magnets on the magnetic field of the main quadrupole magnets and the results will be compared with experimental measurements. We will also discuss applications of permanent magnets with such correctors for hadron beam facilities.
[1] http://arxiv.org/abs/1504.00588
[2] http://arxiv.org/ftp/arxiv/papers/1409/1409.1633.pdf
[3] K. Halbach, NIM 169 (1980) pp. 1-10

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MOPL009

Analytical Approach for Achromatic Structure Study and Design

quadrupole, emittance, cyclotron, factory

203

H.Y. Barminova
MEPhI, Moscow, Russia
A.S. Chikhachev
Allrussian Electrotechnical Institute, Moskow, Russia

The analytical approach is proposed to study the various achromatic structures. The method is based on the self-consistent time-dependent models, which allow to describe the dynamics of both continuous and bunched beam in external magnetic fields. The fully kinetic models are implemented in this approach. The kinetic distribution functions dependent on the motion integrals allow to obtain accurate Vlasov equation solutions as KV-model does it. The method allows to solve the envelope equation both analytically and by ODE system numerical integration, and to predict the beam phase portrait behavior in magnetic fields of the structure. The advantages of the method are the possibility of easy scaling and the wide physical generality, which is important for the multi-parameter problem of the high-intensity high-brightness beam formation. The results of the method application for the bending magnets and the quadrupoles are presented.

Export •

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

MOPL024

Study of Magnets Sorting of the CSNS/RCS Dipoles and Quadrupoles*

quadrupole, closed-orbit, injection, lattice

247

Y.W. An, H.F. Ji, Y. Li, S. Wang, S.Y. Xu
IHEP, Beijing, People's Republic of China
J. Peng
CSNS, Guangdong Province, People's Republic of China

Funding: Work supported by National Natural Science Foundation of China (11405189)*
The Rapid Cycling Synchrotron plays an important role in the China Spallation Neutron Source. RCS accumulates and accelerates the proton beams from 80MeV to 1.6GeV for striking the target with the repetition rate of 25Hz. RCS demands low uncontrolled loss for hands on maintenance, and one needs a tight tolerance on magnet field accuracy. Magnet sorting can be done to minimize linear effects of beam dynamics. Using closed-orbit distortion (COD) and beta-beating independently as the merit function, and considering maintaining the symmetry of the lattice, a code based on traversal algorithm is developed to get the dipoles and quadrupoles sorting for CSNS/RCS. The comparison of beam distribution, collimation efficiency and beam loss are also investigated according to beam injection and beam accelerating.

Export •

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

TUPM5Y01

ESS Linac Plans for Commissioning and Initial Operations

linac, rfq, target, quadrupole

342

R. Miyamoto, M. Eshraqi, M. Muñoz
ESS, Lund, Sweden

Beam commissioning of the proton linac of the European Spallation Source (ESS) is planned to be conducted in 2018 and 2019. At this stage, the last 21 cryomodules are not yet installed and the maximum beam energy and power are 570 MeV and 1.4 MW, with respect to the nominal 2 GeV and 5 MW. The linac will be operated in this condition until the remaining cyromodules are installed in two stages in 2021 and 2022. On top of the common challenges of beam dynamics and machine protection, commissioning of a large scale machine, such as the ESS linac within a relatively short integrated time of less than 40 weeks imposes an additional challenge to the scheduling and planning. This paper lays out the current plans of the ESS linac for its beam commissioning as well as the initial operation.

Slides TUPM5Y01 [3.651 MB]

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