HB2018 - List of Keywords (acceleration)

Paper	Title	Other Keywords	Page
TUA1WD03	Commissioning Status and Plans of CSNS/RCS	MMI, quadrupole, injection, dipole	133
	S.Y. Xu, Y.W. An, J. Chen, M.Y. Huang, H.F. Ji, Y. Li, S. Wang IHEP, Beijing, People's Republic of China X.H. Lu CSNS, Guangdong Province, People's Republic of China
	The China Spallation Neutron Source (CSNS) is an accelerator-based science facility. CSNS is designed to accelerate proton beam pulses to 1.6 GeV kinetic energy, striking a solid metal target to produce spallation neutrons. CSNS has two major accelerator systems, a linear accelerator (80 MeV Linac) and a 1.6 GeV rapid cycling synchrotron (RCS). The Beam commissioning of CSNS has been commissioned recently. Beam had been accelerated to 61 MeV at CSNS/Linac on April 24, 2017, and 1.6 GeV acceleration at CSNS/RCS was successfully accomplished on July 7, 2017 with the injection energy of 61 MeV. Beam had been accelerated to 80 MeV at CSNS/Linac on January 6, 2018, and 1.6 GeV acceleration at CSNS/RCS was successfully accomplished on January 18, 2018 with the injection energy of 80 MeV. The initial machine parameter tuning and various beam studies were completed. In this paper, the commissioning experiences are introduced.
	Slides TUA1WD03 [10.794 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-HB2018-TUA1WD03
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

TUP1WA02	Fixed Field Accelerators and Space Charge Modeling	space-charge, focusing, resonance, synchrotron	158
	A. Adelmann PSI, Villigen PSI, Switzerland C.T. Rogers STFC/RAL/ISIS, Chilton, Didcot, Oxon, United Kingdom S.L. Sheehy STFC/RAL/ASTeC, Chilton, Didcot, Oxon, United Kingdom
	The efforts of the Fixed Field Accelerators FFA (formerly known as FFAG accelerators) community to address the high intensity challenge are reviewed. Starting from analytic estimates and linear models for space charge computation, the current possibilities of precise 3D models for start to end modeling are discussed.
	Slides TUP1WA02 [9.488 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-HB2018-TUP1WA02
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

WEP1WB03	First Heavy Ion Beam Acceleration with a Superconducting Multi Gap CH-cavity	cavity, linac, heavy-ion, emittance	215
	W.A. Barth, M. Heilmann, A. Rubin, A. Schnase, S. Yaramyshev GSI, Darmstadt, Germany K. Aulenbacher, W.A. Barth, F.D. Dziuba, V. Gettmann, T. Kürzeder, M. Miski-Oglu HIM, Mainz, Germany K. Aulenbacher IKP, Mainz, Germany M. Basten, M. Busch, H. Podlech, M. Schwarz IAP, Frankfurt am Main, Germany
	A newly developed superconducting 15-gap RF-cavity has been successfully tested at GSI Helmholtzzentrum für Schwerionenforschung. After a short commissioning and ramp up time of some days, a Crossbar H-cavity accelerated first time heavy ion beams with full transmission up to the design beam energy of 1.85 MeV/u. The design acceleration gain of 3.5 MV inside a length of less than 70 cm has been verified with heavy ion beam of up to 1.5 particle mueA. The measured beam parameters showed excellent beam quality, while a dedicated beam dynamics layout provides beam energy variation between 1.2 and 2.2 MeV/u. The beam commissioning is a milestone of the R&D work of Helmholtz Institute Mainz and GSI in collaboration with Goethe University Frankfurt towards a superconducting heavy ion continuous wave linear accelerator cw-Linac with variable beam energy. Further linac beam dynamics layout issues will be presented as well.
	Slides WEP1WB03 [20.157 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-HB2018-WEP1WB03
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

WEP2PO018	Magnetic Field Tracking at CSNS/RCS	controls, MMI, quadrupole, dipole	306
	S.Y. Xu, S. Fu IHEP, Beijing, People's Republic of China
	Because of the differences of magnetic saturation and eddy current effects between different magnets, magnetic field tracking errors between different magnets is larger than 2.5 % at the Rapid Cycling Synchrotron (RCS) of Chinese Spallation Neutron Source (CSNS), and the induced tune shift is larger than 0.1. So larger tune shift may lead the beam to pass through the resonance lines. To reduce the magnetic field tracking errors, a method of wave form compensation for magnets of the Rapid Cycling Synchrotron was investigated on the magnets of CSNS/RCS. The wave form compensation was applied to CSNS/RCS commissioning. By performing wave form compensation, the maximum magnetic field tracking error was reduced from 2.5 % to 0.08 %, and the maximum tune shift over the ramping process was reduced from 0.1 to 0.004.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-HB2018-WEP2PO018
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

THA1WD01	Experience and Perspective of FFAG Accelerator	proton, cavity, focusing, resonance	342
	Y. Mori Kyoto University, Research Reactor Institute, Osaka, Japan
	Funding: This work was funded by ImPACT Program of Council for Science, Technology and Innovation (Cabinet Office, Government of Japan) This talk is about operational challenge and perspective of Fixed Field Alternating Gradient accelerators, including the recent studies on advanced FFAG for high intensity secondary particles.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-HB2018-THA1WD01
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THP1WB01	Commissioning Status of Linear IFMIF Prototype Accelerator (LIPAc)	rfq, MMI, cavity, emittance	366
	A. Kasugai, T. Akagi, T. Ebisawa, Y. Hirata, R. Ichimiya, K. Kondo, S. Maebara, K. Sakamoto, T. Shinya, M. Sugimoto QST, Aomori, Japan P. Abbon, N. Bazin, B. Bolzon, N. Chauvin, S. Chel, R. Gobin, J. Marroncle, B. Renard CEA/DSM/IRFU, France L. Antoniazzi, L. Bellan, D. Bortolato, M. Comunian, E. Fagotti, F. Grespan, M. Montis, A. Palmieri, A. Pisent INFN/LNL, Legnaro (PD), Italy P.-Y. Beauvais, H. Dzitko, D. Gex, A. Jokinen, G. Phillips F4E, Germany P. Cara, R. Heidinger, I. Moya Fusion for Energy, Garching, Germany D. Jiménez-Rey, I. Kirpitchev, J. Mollá, P. Méndez, I. Podadera, D. Regidor, M. Weber, C. de la Morena CIEMAT, Madrid, Spain J. Knaster, A. Marqueta, G. Pruneri, F. Scantamburlo IFMIF/EVEDA, Rokkasho, Japan
	The IFMIF project aiming at material tests for a future fusion DEMO reactor is under the EVEDA phase in the BA Agreement of fusion program between Japan and EU. As the accelerator activity, the installation and commissioning of the Linear IFMIF Prototype Accelerator (LIPAc) is at the second stage of demonstration of the feasibility of the low energy section of an IFMIF deuteron accelerator up to 9 MeV with a beam current of 125 mA, CW. The installation of injector, RFQ, MEBT, D-Plate and LPBD for LIPAc with 8 coaxial high-power transmission lines and RF power system was just done in 2017 at Rokkasho, Japan. After that, the RF conditioning of RFQ for beam commissioning is underway. The beam commissioning of RFQ with H⁺/D⁺ and the acceleration demonstration up to 5 MeV-125 mA-0.1% duty cycle with D⁺ will be done.
	Slides THP1WB01 [13.177 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-HB2018-THP1WB01
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

THP2WB04	Longitudinal Dynamics of Low Energy Superconducting Linac	cavity, linac, focusing, lattice	383
	Z. Li SCU, Chengdu, People's Republic of China
	Funding: funded by NSFC(11375122, 11511140277) The superconducting linac is composed of short independent cavities, and the cavity occupies only a small portion (1/4 to 1/6) of the machine compared with the normal conducting one. When phase advance per period is greater than 60 degrees, the smooth approximation is no longer valid and the longitudinal motion has to be described by time dependent system. With the help of Poincare map, the single particle nonlinear time dependent longitudinal motion is investigated. The study shows that when phase advance per period is less than 60 degrees, the system can be well described by smooth approximation, that means there is a clear boundary (separatrix) between stable and unstable area; when phase advance is greater than 60 degrees, the system shows a quite different dynamic structures and the phase acceptance is decreased significantly compared with the smooth approximation theory predicated, especially when phase advance per period is greater than 90 degrees. The results show that even for low current ma-chine, the zero current phase advance should be kept less than 90 degrees to make sure there is no particle loss because of the shrink of the longitudinal acceptance.
	Slides THP2WB04 [1.061 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-HB2018-THP2WB04
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

THP2WC03	The Choosing of Magnetic Structure of Isochronous Cyclotron DC-130 for Applied Research	cyclotron, operation, heavy-ion, extraction	446
	I.A. Ivanenko, J. Franko, G.G. Gulbekyan, I.V. Kalagin, N.Yu. Kazarinov JINR, Dubna, Moscow Region, Russia
	At the present time, the activities on creation of the new multipurpose isochronous cyclotron DC130 are carried out at the FLNR, JINR. The cyclotron DC130 is intended for microchip testing, production of track pore membranes and for applied physics. The cyclotron will accelerate the heavy ions with mass-to-charge ratio A/Z from 5 to 8 up to the fixed energies 2 and 4.5 MeV per nucleon. The main magnet and acceleration system of DC130 is based on the U200 cyclotron that now is under reconstruction. At the present paper the method of choosing of main magnet parameters of cyclotron is described.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-HB2018-THP2WC03
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

Paper

Title

Other Keywords

Page

TUA1WD03

Commissioning Status and Plans of CSNS/RCS

MMI, quadrupole, injection, dipole

133

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

The China Spallation Neutron Source (CSNS) is an accelerator-based science facility. CSNS is designed to accelerate proton beam pulses to 1.6 GeV kinetic energy, striking a solid metal target to produce spallation neutrons. CSNS has two major accelerator systems, a linear accelerator (80 MeV Linac) and a 1.6 GeV rapid cycling synchrotron (RCS). The Beam commissioning of CSNS has been commissioned recently. Beam had been accelerated to 61 MeV at CSNS/Linac on April 24, 2017, and 1.6 GeV acceleration at CSNS/RCS was successfully accomplished on July 7, 2017 with the injection energy of 61 MeV. Beam had been accelerated to 80 MeV at CSNS/Linac on January 6, 2018, and 1.6 GeV acceleration at CSNS/RCS was successfully accomplished on January 18, 2018 with the injection energy of 80 MeV. The initial machine parameter tuning and various beam studies were completed. In this paper, the commissioning experiences are introduced.

Slides TUA1WD03 [10.794 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-HB2018-TUA1WD03

Export •

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

TUP1WA02

Fixed Field Accelerators and Space Charge Modeling

space-charge, focusing, resonance, synchrotron

158

A. Adelmann
PSI, Villigen PSI, Switzerland
C.T. Rogers
STFC/RAL/ISIS, Chilton, Didcot, Oxon, United Kingdom
S.L. Sheehy
STFC/RAL/ASTeC, Chilton, Didcot, Oxon, United Kingdom

The efforts of the Fixed Field Accelerators FFA (formerly known as FFAG accelerators) community to address the high intensity challenge are reviewed. Starting from analytic estimates and linear models for space charge computation, the current possibilities of precise 3D models for start to end modeling are discussed.

Slides TUP1WA02 [9.488 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-HB2018-TUP1WA02

Export •

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

WEP1WB03

First Heavy Ion Beam Acceleration with a Superconducting Multi Gap CH-cavity

cavity, linac, heavy-ion, emittance

215

W.A. Barth, M. Heilmann, A. Rubin, A. Schnase, S. Yaramyshev
GSI, Darmstadt, Germany
K. Aulenbacher, W.A. Barth, F.D. Dziuba, V. Gettmann, T. Kürzeder, M. Miski-Oglu
HIM, Mainz, Germany
K. Aulenbacher
IKP, Mainz, Germany
M. Basten, M. Busch, H. Podlech, M. Schwarz
IAP, Frankfurt am Main, Germany

A newly developed superconducting 15-gap RF-cavity has been successfully tested at GSI Helmholtzzentrum für Schwerionenforschung. After a short commissioning and ramp up time of some days, a Crossbar H-cavity accelerated first time heavy ion beams with full transmission up to the design beam energy of 1.85 MeV/u. The design acceleration gain of 3.5 MV inside a length of less than 70 cm has been verified with heavy ion beam of up to 1.5 particle mueA. The measured beam parameters showed excellent beam quality, while a dedicated beam dynamics layout provides beam energy variation between 1.2 and 2.2 MeV/u. The beam commissioning is a milestone of the R&D work of Helmholtz Institute Mainz and GSI in collaboration with Goethe University Frankfurt towards a superconducting heavy ion continuous wave linear accelerator cw-Linac with variable beam energy. Further linac beam dynamics layout issues will be presented as well.

Slides WEP1WB03 [20.157 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-HB2018-WEP1WB03

Export •

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

WEP2PO018

Magnetic Field Tracking at CSNS/RCS

controls, MMI, quadrupole, dipole

306

S.Y. Xu, S. Fu
IHEP, Beijing, People's Republic of China

Because of the differences of magnetic saturation and eddy current effects between different magnets, magnetic field tracking errors between different magnets is larger than 2.5 % at the Rapid Cycling Synchrotron (RCS) of Chinese Spallation Neutron Source (CSNS), and the induced tune shift is larger than 0.1. So larger tune shift may lead the beam to pass through the resonance lines. To reduce the magnetic field tracking errors, a method of wave form compensation for magnets of the Rapid Cycling Synchrotron was investigated on the magnets of CSNS/RCS. The wave form compensation was applied to CSNS/RCS commissioning. By performing wave form compensation, the maximum magnetic field tracking error was reduced from 2.5 % to 0.08 %, and the maximum tune shift over the ramping process was reduced from 0.1 to 0.004.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-HB2018-WEP2PO018

Export •

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

THA1WD01

Experience and Perspective of FFAG Accelerator

proton, cavity, focusing, resonance

342

Y. Mori
Kyoto University, Research Reactor Institute, Osaka, Japan

Funding: This work was funded by ImPACT Program of Council for Science, Technology and Innovation (Cabinet Office, Government of Japan)
This talk is about operational challenge and perspective of Fixed Field Alternating Gradient accelerators, including the recent studies on advanced FFAG for high intensity secondary particles.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-HB2018-THA1WD01

Export •

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

THP1WB01

Commissioning Status of Linear IFMIF Prototype Accelerator (LIPAc)

rfq, MMI, cavity, emittance

366

A. Kasugai, T. Akagi, T. Ebisawa, Y. Hirata, R. Ichimiya, K. Kondo, S. Maebara, K. Sakamoto, T. Shinya, M. Sugimoto
QST, Aomori, Japan
P. Abbon, N. Bazin, B. Bolzon, N. Chauvin, S. Chel, R. Gobin, J. Marroncle, B. Renard
CEA/DSM/IRFU, France
L. Antoniazzi, L. Bellan, D. Bortolato, M. Comunian, E. Fagotti, F. Grespan, M. Montis, A. Palmieri, A. Pisent
INFN/LNL, Legnaro (PD), Italy
P.-Y. Beauvais, H. Dzitko, D. Gex, A. Jokinen, G. Phillips
F4E, Germany
P. Cara, R. Heidinger, I. Moya
Fusion for Energy, Garching, Germany
D. Jiménez-Rey, I. Kirpitchev, J. Mollá, P. Méndez, I. Podadera, D. Regidor, M. Weber, C. de la Morena
CIEMAT, Madrid, Spain
J. Knaster, A. Marqueta, G. Pruneri, F. Scantamburlo
IFMIF/EVEDA, Rokkasho, Japan

The IFMIF project aiming at material tests for a future fusion DEMO reactor is under the EVEDA phase in the BA Agreement of fusion program between Japan and EU. As the accelerator activity, the installation and commissioning of the Linear IFMIF Prototype Accelerator (LIPAc) is at the second stage of demonstration of the feasibility of the low energy section of an IFMIF deuteron accelerator up to 9 MeV with a beam current of 125 mA, CW. The installation of injector, RFQ, MEBT, D-Plate and LPBD for LIPAc with 8 coaxial high-power transmission lines and RF power system was just done in 2017 at Rokkasho, Japan. After that, the RF conditioning of RFQ for beam commissioning is underway. The beam commissioning of RFQ with H⁺/D⁺ and the acceleration demonstration up to 5 MeV-125 mA-0.1% duty cycle with D⁺ will be done.

Slides THP1WB01 [13.177 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-HB2018-THP1WB01

Export •

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

THP2WB04

Longitudinal Dynamics of Low Energy Superconducting Linac

cavity, linac, focusing, lattice

383

Z. Li
SCU, Chengdu, People's Republic of China

Funding: funded by NSFC(11375122, 11511140277)
The superconducting linac is composed of short independent cavities, and the cavity occupies only a small portion (1/4 to 1/6) of the machine compared with the normal conducting one. When phase advance per period is greater than 60 degrees, the smooth approximation is no longer valid and the longitudinal motion has to be described by time dependent system. With the help of Poincare map, the single particle nonlinear time dependent longitudinal motion is investigated. The study shows that when phase advance per period is less than 60 degrees, the system can be well described by smooth approximation, that means there is a clear boundary (separatrix) between stable and unstable area; when phase advance is greater than 60 degrees, the system shows a quite different dynamic structures and the phase acceptance is decreased significantly compared with the smooth approximation theory predicated, especially when phase advance per period is greater than 90 degrees. The results show that even for low current ma-chine, the zero current phase advance should be kept less than 90 degrees to make sure there is no particle loss because of the shrink of the longitudinal acceptance.

Slides THP2WB04 [1.061 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-HB2018-THP2WB04

Export •

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

THP2WC03

The Choosing of Magnetic Structure of Isochronous Cyclotron DC-130 for Applied Research

cyclotron, operation, heavy-ion, extraction

446

I.A. Ivanenko, J. Franko, G.G. Gulbekyan, I.V. Kalagin, N.Yu. Kazarinov
JINR, Dubna, Moscow Region, Russia

At the present time, the activities on creation of the new multipurpose isochronous cyclotron DC130 are carried out at the FLNR, JINR. The cyclotron DC130 is intended for microchip testing, production of track pore membranes and for applied physics. The cyclotron will accelerate the heavy ions with mass-to-charge ratio A/Z from 5 to 8 up to the fixed energies 2 and 4.5 MeV per nucleon. The main magnet and acceleration system of DC130 is based on the U200 cyclotron that now is under reconstruction. At the present paper the method of choosing of main magnet parameters of cyclotron is described.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-HB2018-THP2WC03

Export •

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