IPAC2018 - List of Authors (Ames, F.)

Paper	Title	Page
MOXGB2	ARIEL at TRIUMF: Science and Technology	6
	J.A. Bagger, F. Ames, Y. Bylinskii, A. Gottberg, O.K. Kester, S.R. Koscielniak, R.E. Laxdal, M. Marchetto, P. Schaffer TRIUMF, Vancouver, Canada M. Hayashi TRIUMF Innovations Inc., Vancouver, Canada
	The Advanced Rare Isotope Laboratory (ARIEL) is TRIUMF's flagship project to create isotopes for science, medicine and business. ARIEL will triple TRIUMF's rare isotope beam capability, enabling more and new experiments in materials science, nuclear physics, nuclear astrophysics, and fundamental symmetries, as well as the development of new isotopes for the life sciences. Beams from ARIEL's new 35 MeV, 100kW electron linear accelerator and from TRIUMF's original 500 MeV cyclotron will enable breakthrough experiments with the laboratory's suite of world-class experiments at the Isotope Separator and Accelerator (ISAC) facility. This invited talk will present an overview of TRIUMF, the ARIEL project, and the exciting science they enable.
	Slides MOXGB2 [65.004 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2018-MOXGB2
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THPAL116	Development and Installation of the CANREB RFQ Buncher at TRIUMF	3914
	B. Barquest, F. Ames, T. Au, L. Graham, M.R. Pearson, V. Zvyagintsev TRIUMF, Vancouver, Canada J. Bale, J. Dilling, R. Kruecken, Y. Lan UBC & TRIUMF, Vancouver, British Columbia, Canada G. Gwinner University of Manitoba, Manitoba, Canada N. Janzen, R.A. Simpson UW/Physics, Waterloo, Ontario, Canada R. Kanungo Saint Mary's University, Halifax, Canada
	Funding: TRIUMF receives federal funding via the National Research Council of Canada. CANREB is funded by the Canada Foundation for Innovation (CFI), the Provinces NS, MB and TRIUMF. Pure, intense rare isotope beams at a wide range of energies are crucial to the nuclear science programs at TRIUMF. The CANREB project will deliver a high resolution spectrometer (HRS) for beam purification, and a charge breeding system consisting of a radiofrequency quadrupole (RFQ) beam cooler and buncher, an electron beam ion source (EBIS), and a Nier-type spectrometer to prepare the beam for post-acceleration. Bunching the beam prior to charge breeding will significantly enhance the efficiency of the EBIS. The RFQ buncher will accept continuous §I{60}{keV} rare isotope beams from the ARIEL or ISAC production targets and efficiently deliver low emittance bunched beams. A pulsed drift tube (PDT) will adjust the energy of the bunched beam for injection into the EBIS to match the acceptance of the post-accelerating RFQ. Ion optical simulations were carried out to inform the design of the RFQ buncher and PDT. Simulations indicate that delivery of up to 10⁷~ions per bunch with high efficiency is possible. Experience with previous beam bunchers was also brought to bear in the design effort. Installation of the RFQ is under way, and tests with offline beam are expected to be performed in late 2018.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2018-THPAL116
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THPML025	Operation of an RF Modulated Thermionic Electron Source at TRIUMF	4705
	F. Ames, K. Fong, B. Humphries, S.R. Koscielniak, A. Laxdal, Y. Ma, T. Planche, S. Saminathan, E. Thoeng TRIUMF, Vancouver, Canada
	ARIEL (Advanced Rare IsotopE Laboratory) at TRIUMF will use a high-power electron beam to produce radioactive ion beams via photo-fission. The system has been designed to provide up to 10 mA of electrons at 30 MeV. The electron source delivers electron bunches with charge up to 16 pC at a repetition frequency of 650 MHz at 300 keV. The main components of the source are a gridded dispenser cathode (CPI - Y845) in an SF6 filled vessel and an in-air HV power supply. The beam is bunched by applying DC and RF fields to the grid. A macro pulse structure can be applied by additional low frequency modulation of the RF signal. This allows adjusting the average beam current by changing the duty factor of the macro pulsing. Unique features of the gun are its cathode/anode geometry to reduce field emission, and transmission of RF modulation via a dielectric (ceramic) waveguide through the SF6. The source has been installed and fully commissioned to a beam power up to 1 KW and tests with accelerated beams have been performed. Measurements of the beam properties and results from the commissioning and operational experiences of the source will be presented.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2018-THPML025
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THPML041	FEBIAD Ion Source Development at TRIUMF-ISAC	4730
	B.E. Schultz, F. Ames, O.K. Kester, P. Kunz, A. Mjøs, J.F. Sandor TRIUMF, Vancouver, Canada
	The ISOL facility TRIUMF-ISAC utilizes a number of different ion sources to produce radioactive ion beams. Most isotopes are ionized using surface or resonant laser ionization, but these techniques are prohibitively inefficient for species with high ionization energies, such as noble gases and molecules. For these cases, the Forced Electron Beam Induced Arc Discharge (FEBIAD) ion source can be used. The FEBIAD uses a hot cathode to produce electrons, which are accelerated through a potential (< 200 V) into the anode volume. Isotopes entering the resulting plasma undergo impact ionization and are extracted. Efforts are under way to better understand the physics and operation of the FEBIAD, using both theory and experiment. Recent measurements and simulations on the ISAC FEBIAD will be reported here.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2018-THPML041
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THPML080	Preliminary Results of a New High Brightness H⁻ Ion Source Developed at TRIUMF	4839
	K. Jayamanna, F. Ames, Y. Bylinskii, J.Y. Cheng, M. Lovera, M. Minato TRIUMF, Vancouver, Canada
	This paper describes the preliminary results of a high brightness ion source developed at TRIUMF, which is capable of producing a negative hydrogen ion beam (H⁻) of up to 5 mA of direct current. A 1.7 mm.mrad and 5 mm.mrad emittance(rms) is achieved for 500 uA and for 1 mA H-, respectively. Characteristics as well as a brief description regarding extraction issues of the source to date are also presented.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2018-THPML080
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Paper

Title

Page

ARIEL at TRIUMF: Science and Technology

6

J.A. Bagger, F. Ames, Y. Bylinskii, A. Gottberg, O.K. Kester, S.R. Koscielniak, R.E. Laxdal, M. Marchetto, P. Schaffer
TRIUMF, Vancouver, Canada
M. Hayashi
TRIUMF Innovations Inc., Vancouver, Canada

The Advanced Rare Isotope Laboratory (ARIEL) is TRIUMF's flagship project to create isotopes for science, medicine and business. ARIEL will triple TRIUMF's rare isotope beam capability, enabling more and new experiments in materials science, nuclear physics, nuclear astrophysics, and fundamental symmetries, as well as the development of new isotopes for the life sciences. Beams from ARIEL's new 35 MeV, 100kW electron linear accelerator and from TRIUMF's original 500 MeV cyclotron will enable breakthrough experiments with the laboratory's suite of world-class experiments at the Isotope Separator and Accelerator (ISAC) facility. This invited talk will present an overview of TRIUMF, the ARIEL project, and the exciting science they enable.

Slides MOXGB2 [65.004 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2018-MOXGB2

Export •

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

THPAL116

Development and Installation of the CANREB RFQ Buncher at TRIUMF

3914

B. Barquest, F. Ames, T. Au, L. Graham, M.R. Pearson, V. Zvyagintsev
TRIUMF, Vancouver, Canada
J. Bale, J. Dilling, R. Kruecken, Y. Lan
UBC & TRIUMF, Vancouver, British Columbia, Canada
G. Gwinner
University of Manitoba, Manitoba, Canada
N. Janzen, R.A. Simpson
UW/Physics, Waterloo, Ontario, Canada
R. Kanungo
Saint Mary's University, Halifax, Canada

Funding: TRIUMF receives federal funding via the National Research Council of Canada. CANREB is funded by the Canada Foundation for Innovation (CFI), the Provinces NS, MB and TRIUMF.
Pure, intense rare isotope beams at a wide range of energies are crucial to the nuclear science programs at TRIUMF. The CANREB project will deliver a high resolution spectrometer (HRS) for beam purification, and a charge breeding system consisting of a radiofrequency quadrupole (RFQ) beam cooler and buncher, an electron beam ion source (EBIS), and a Nier-type spectrometer to prepare the beam for post-acceleration. Bunching the beam prior to charge breeding will significantly enhance the efficiency of the EBIS. The RFQ buncher will accept continuous §I{60}{keV} rare isotope beams from the ARIEL or ISAC production targets and efficiently deliver low emittance bunched beams. A pulsed drift tube (PDT) will adjust the energy of the bunched beam for injection into the EBIS to match the acceptance of the post-accelerating RFQ. Ion optical simulations were carried out to inform the design of the RFQ buncher and PDT. Simulations indicate that delivery of up to 10⁷~ions per bunch with high efficiency is possible. Experience with previous beam bunchers was also brought to bear in the design effort. Installation of the RFQ is under way, and tests with offline beam are expected to be performed in late 2018.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2018-THPAL116

Export •

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

THPML025

Operation of an RF Modulated Thermionic Electron Source at TRIUMF

4705

F. Ames, K. Fong, B. Humphries, S.R. Koscielniak, A. Laxdal, Y. Ma, T. Planche, S. Saminathan, E. Thoeng
TRIUMF, Vancouver, Canada

ARIEL (Advanced Rare IsotopE Laboratory) at TRIUMF will use a high-power electron beam to produce radioactive ion beams via photo-fission. The system has been designed to provide up to 10 mA of electrons at 30 MeV. The electron source delivers electron bunches with charge up to 16 pC at a repetition frequency of 650 MHz at 300 keV. The main components of the source are a gridded dispenser cathode (CPI - Y845) in an SF6 filled vessel and an in-air HV power supply. The beam is bunched by applying DC and RF fields to the grid. A macro pulse structure can be applied by additional low frequency modulation of the RF signal. This allows adjusting the average beam current by changing the duty factor of the macro pulsing. Unique features of the gun are its cathode/anode geometry to reduce field emission, and transmission of RF modulation via a dielectric (ceramic) waveguide through the SF6. The source has been installed and fully commissioned to a beam power up to 1 KW and tests with accelerated beams have been performed. Measurements of the beam properties and results from the commissioning and operational experiences of the source will be presented.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2018-THPML025

Export •

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

THPML041

FEBIAD Ion Source Development at TRIUMF-ISAC

4730

B.E. Schultz, F. Ames, O.K. Kester, P. Kunz, A. Mjøs, J.F. Sandor
TRIUMF, Vancouver, Canada

The ISOL facility TRIUMF-ISAC utilizes a number of different ion sources to produce radioactive ion beams. Most isotopes are ionized using surface or resonant laser ionization, but these techniques are prohibitively inefficient for species with high ionization energies, such as noble gases and molecules. For these cases, the Forced Electron Beam Induced Arc Discharge (FEBIAD) ion source can be used. The FEBIAD uses a hot cathode to produce electrons, which are accelerated through a potential (< 200 V) into the anode volume. Isotopes entering the resulting plasma undergo impact ionization and are extracted. Efforts are under way to better understand the physics and operation of the FEBIAD, using both theory and experiment. Recent measurements and simulations on the ISAC FEBIAD will be reported here.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2018-THPML041

Export •

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

THPML080

Preliminary Results of a New High Brightness H⁻ Ion Source Developed at TRIUMF

4839

K. Jayamanna, F. Ames, Y. Bylinskii, J.Y. Cheng, M. Lovera, M. Minato
TRIUMF, Vancouver, Canada

This paper describes the preliminary results of a high brightness ion source developed at TRIUMF, which is capable of producing a negative hydrogen ion beam (H⁻) of up to 5 mA of direct current. A 1.7 mm.mrad and 5 mm.mrad emittance(rms) is achieved for 500 uA and for 1 mA H-, respectively. Characteristics as well as a brief description regarding extraction issues of the source to date are also presented.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2018-THPML080

Export •

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