CYCLOTRONS2022 - List of Keywords (bunching)

Paper	Title	Other Keywords	Page
MOPO003	Sawtooth Wave Buncher Upgrade for SFC Cyclotron	cyclotron, ECR, injection, operation	51
	R. Zhang, X.M. Su, X.W. Wang, Z. Xu IMP/CAS, Lanzhou, People’s Republic of China
	To increase extracted beam intensity, the SFC cyclotron requires that the sawtooth wave buncher on its injection line provide the effective voltage up to 2.5kV and cover a wide frequency range of six times. We develope a multi-harmonic synthesis method by combining a broadband amplifier and impedance transformer, which provide a high-voltage single-gap buncher at limited space and cost. With this method, the maximum voltage of the new buncher exceeds 2.5kV and the beam intensity increases by a factor of 6.7.
	Poster MOPO003 [1.092 MB]
DOI •	reference for this paper ※ doi:10.18429/JACoW-CYCLOTRONS2022-MOPO003
About •	Received ※ 04 December 2022 — Revised ※ 12 February 2023 — Accepted ※ 22 February 2023 — Issue date ※ 25 August 2023
Cite •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

TUAO04	Design of a Multi-Harmonic Buncher for TRIUMF 500 MeV Cyclotron	injection, cyclotron, simulation, space-charge	118
	S. Saminathan, R.A. Baartman, Y. Bylinskii, M. Ilagan, P.M. Jung, O. Law, R.E. Laxdal, M. Marchetto, T. Planche, V. Zvyagintsev TRIUMF, Vancouver, Canada
	The TRIUMF 500 MeV cyclotron injection system consists of a 40 m long beamline to transport the 300 keV H⁻ ion beams into the cyclotron. Part of the original beamline, the vertical injection section, was replaced in 2011 and, while the remaining horizontal injection section is being redesigned for replacement. As part of the horizontal injection beamline upgrade, the present buncher system will be replaced with a new one. Presently, the injection system consists of two double gap bunchers. The first buncher operates at the cyclotron RF frequency (23.06 MHz) while the second operates at the second harmonic frequency (46.12 MHz). The proposed new buncher is based on a two-electrode multi-harmonic system, which will be operated by up to three harmonics. The beam dynamics studies have been performed, including the space-charge effects using the particle-in-cell code WARP. Simulation results of longitudinal beam dynamics are presented for transporting beam intensity up to 1 mA.
	Slides TUAO04 [2.473 MB]
DOI •	reference for this paper ※ doi:10.18429/JACoW-CYCLOTRONS2022-TUAO04
About •	Received ※ 03 January 2023 — Revised ※ 11 February 2023 — Accepted ※ 13 February 2023 — Issue date ※ 05 March 2023
Cite •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

Paper

Title

Other Keywords

Page

MOPO003

Sawtooth Wave Buncher Upgrade for SFC Cyclotron

cyclotron, ECR, injection, operation

51

R. Zhang, X.M. Su, X.W. Wang, Z. Xu
IMP/CAS, Lanzhou, People’s Republic of China

To increase extracted beam intensity, the SFC cyclotron requires that the sawtooth wave buncher on its injection line provide the effective voltage up to 2.5kV and cover a wide frequency range of six times. We develope a multi-harmonic synthesis method by combining a broadband amplifier and impedance transformer, which provide a high-voltage single-gap buncher at limited space and cost. With this method, the maximum voltage of the new buncher exceeds 2.5kV and the beam intensity increases by a factor of 6.7.

Poster MOPO003 [1.092 MB]

DOI •

reference for this paper ※ doi:10.18429/JACoW-CYCLOTRONS2022-MOPO003

About •

Received ※ 04 December 2022 — Revised ※ 12 February 2023 — Accepted ※ 22 February 2023 — Issue date ※ 25 August 2023

Cite •

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

TUAO04

Design of a Multi-Harmonic Buncher for TRIUMF 500 MeV Cyclotron

injection, cyclotron, simulation, space-charge

118

S. Saminathan, R.A. Baartman, Y. Bylinskii, M. Ilagan, P.M. Jung, O. Law, R.E. Laxdal, M. Marchetto, T. Planche, V. Zvyagintsev
TRIUMF, Vancouver, Canada

The TRIUMF 500 MeV cyclotron injection system consists of a 40 m long beamline to transport the 300 keV H⁻ ion beams into the cyclotron. Part of the original beamline, the vertical injection section, was replaced in 2011 and, while the remaining horizontal injection section is being redesigned for replacement. As part of the horizontal injection beamline upgrade, the present buncher system will be replaced with a new one. Presently, the injection system consists of two double gap bunchers. The first buncher operates at the cyclotron RF frequency (23.06 MHz) while the second operates at the second harmonic frequency (46.12 MHz). The proposed new buncher is based on a two-electrode multi-harmonic system, which will be operated by up to three harmonics. The beam dynamics studies have been performed, including the space-charge effects using the particle-in-cell code WARP. Simulation results of longitudinal beam dynamics are presented for transporting beam intensity up to 1 mA.

Slides TUAO04 [2.473 MB]

DOI •

reference for this paper ※ doi:10.18429/JACoW-CYCLOTRONS2022-TUAO04

About •

Received ※ 03 January 2023 — Revised ※ 11 February 2023 — Accepted ※ 13 February 2023 — Issue date ※ 05 March 2023

Cite •

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