ECRIS2024 - List of Authors (Ames, F.)

Paper	Title	Page
MOB2	ECRIS operation and developments at TRIUMF	10
	F. Ames, J.A. Adegun, C.R.J. Charles, K. Jayamanna, O.K. Kester, B.E. Schultz TRIUMF, Vancouver, Canada
	Rare isotope beams are used at the ISAC facility at TRIUMF for studies mainly in nuclear and astrophysics, but also for applications ranging from material science to medicine. The isotopes are produced via the ISOL technique and ionized via a set of different ion sources depending on the application. In cases where highly charged ions are needed, charge state breeding is done with a 14.5 GHz PHOENIX ECR ion source from PANTECHNIK. The source has been operational for more than a decade providing a wide range of ions from Na to U at A/Q <7 for post-acceleration. A second ECR ion source, a SUPERNANOGAN also from PANTECHNIK is used to provide highly charged ions from stable isotopes either for set-up and calibration for the rare isotope beams or for nuclear reaction studies with stable ions. The presentation will give a summary of results and will describe the challenges and improvements to the original sources. For the charge state breeding this is mainly increasing the efficiency and the purity of the delivered beams. In the case of the SUPERNANOGAN special emphasis is put on operational aspects to cover a wide range of elements and easy switchover. The latest in this series of improvements is the implementation of two frequency plasma heating in both ion sources.
	Slides MOB2 [2.008 MB]
DOI •	reference for this paper ※ doi:10.18429/JACoW-ECRIS2024-MOB2
About •	Received ※ 15 September 2024 — Revised ※ 25 November 2024 — Accepted ※ 29 January 2025 — Issued ※ 29 March 2025
Cite •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

TUA1	Design of a new iron plug for the TRIUMF ECRIS charge state booster	68
	J.A. Adegun, F. Ames, O.K. Kester TRIUMF, Vancouver, Canada
	Funding: Natural Sciences and Engineering Research Council of Canada (NSERC) and TRIUMF This paper presents an innovative solution to address the issue of asymmetric dipole fields in the injection region of the TRIUMF electron cyclotron resonance ion source charge state booster. The asymmetric fields arise from a wide gap in the booster’s injection soft iron plug, which allows the connection of the RF waveguide to the plasma chamber. Simulations have revealed that singly charged ions, injected for charge breeding, experience deflection and get lost due to the asymmetric magnetic fields instead of being effectively captured by the plasma, thereby diminishing the efficiency of the charge state booster. To rectify this problem, a novel iron plug with an enlarged inner diameter, which allows the RF waveguide to connect to the plasma chamber with no gap was designed. Furthermore, this new design necessitates alterations to the injection electrodes and plasma chamber of the booster. Additionally, the waveguide and gas-inlet windows were repositioned to ensure better RF coupling into the plasma cavity. By eliminating the gap and implementing these design changes, it is anticipated that the TRIUMF charge state booster will operate at the same overall efficiency as other PHOENIX boosters.
	Slides TUA1 [5.636 MB]
DOI •	reference for this paper ※ doi:10.18429/JACoW-ECRIS2024-TUA1
About •	Received ※ 17 September 2024 — Revised ※ 07 October 2024 — Accepted ※ 29 May 2025 — Issued ※ 23 June 2025
Cite •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

Paper

Title

Page

ECRIS operation and developments at TRIUMF

10

F. Ames, J.A. Adegun, C.R.J. Charles, K. Jayamanna, O.K. Kester, B.E. Schultz
TRIUMF, Vancouver, Canada

Rare isotope beams are used at the ISAC facility at TRIUMF for studies mainly in nuclear and astrophysics, but also for applications ranging from material science to medicine. The isotopes are produced via the ISOL technique and ionized via a set of different ion sources depending on the application. In cases where highly charged ions are needed, charge state breeding is done with a 14.5 GHz PHOENIX ECR ion source from PANTECHNIK. The source has been operational for more than a decade providing a wide range of ions from Na to U at A/Q <7 for post-acceleration. A second ECR ion source, a SUPERNANOGAN also from PANTECHNIK is used to provide highly charged ions from stable isotopes either for set-up and calibration for the rare isotope beams or for nuclear reaction studies with stable ions. The presentation will give a summary of results and will describe the challenges and improvements to the original sources. For the charge state breeding this is mainly increasing the efficiency and the purity of the delivered beams. In the case of the SUPERNANOGAN special emphasis is put on operational aspects to cover a wide range of elements and easy switchover. The latest in this series of improvements is the implementation of two frequency plasma heating in both ion sources.

Slides MOB2 [2.008 MB]

DOI •

reference for this paper ※ doi:10.18429/JACoW-ECRIS2024-MOB2

About •

Received ※ 15 September 2024 — Revised ※ 25 November 2024 — Accepted ※ 29 January 2025 — Issued ※ 29 March 2025

Cite •

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

TUA1

Design of a new iron plug for the TRIUMF ECRIS charge state booster

68

J.A. Adegun, F. Ames, O.K. Kester
TRIUMF, Vancouver, Canada

Funding: Natural Sciences and Engineering Research Council of Canada (NSERC) and TRIUMF
This paper presents an innovative solution to address the issue of asymmetric dipole fields in the injection region of the TRIUMF electron cyclotron resonance ion source charge state booster. The asymmetric fields arise from a wide gap in the booster’s injection soft iron plug, which allows the connection of the RF waveguide to the plasma chamber. Simulations have revealed that singly charged ions, injected for charge breeding, experience deflection and get lost due to the asymmetric magnetic fields instead of being effectively captured by the plasma, thereby diminishing the efficiency of the charge state booster. To rectify this problem, a novel iron plug with an enlarged inner diameter, which allows the RF waveguide to connect to the plasma chamber with no gap was designed. Furthermore, this new design necessitates alterations to the injection electrodes and plasma chamber of the booster. Additionally, the waveguide and gas-inlet windows were repositioned to ensure better RF coupling into the plasma cavity. By eliminating the gap and implementing these design changes, it is anticipated that the TRIUMF charge state booster will operate at the same overall efficiency as other PHOENIX boosters.

Slides TUA1 [5.636 MB]

DOI •

reference for this paper ※ doi:10.18429/JACoW-ECRIS2024-TUA1

About •

Received ※ 17 September 2024 — Revised ※ 07 October 2024 — Accepted ※ 29 May 2025 — Issued ※ 23 June 2025

Cite •

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