IPAC2017 - List of Authors (Baartman, R.A.)

Paper	Title	Page
MOPIK028	Simulation Study of Halo Collimation in the TRIUMF Ariel Proton Beam Line	557
	F.W. Jones, R.A. Baartman, I.V. Bylinskii, Y.-N. Rao TRIUMF, Vancouver, Canada
	Funding: Funded under a contribution agreement with NRC (National Research Council of Canada). Capital funding from CFI (Canada Foundation for Innovation). The TRIUMF 500 MeV H⁻ cyclotron uses stripping foil extraction to drive several proton beam lines serving different experimental programs. As part of TRIUMF's Ariel facility now under construction, a new proton beam line 4-North will be installed to transport up to 100 microamps of 480 MeV protons to an ISOL target station for rare isotope beam production. This beam line has been designed for low-loss (< 1nA/m) operation and provides space for a collimator to remove the beam halo produced by large-angle scattering in the cyclotron extraction foil. We have studied proton loss patterns and collimation efficiency using simulation codes: the older REVMOC program and a fully 3D simulation based on Geant4, with all particle interactions in matter included. Scattering in the foil is treated by a separate iterated single-scatter model. Using these tools we arrive at a prototype design for an effective collimator.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2017-MOPIK028
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MOPIK056	On the Ariel Pre-Separator	648
	S. Saminathan, R.A. Baartman TRIUMF, Vancouver, Canada
	Funding: Funded under a contribution agreement with NRC (National Research Council Canada) and Capital funding from CFI (Canada Foundation for Innovation). Two new independent target ion sources with dedicated pre-separators will be built in the ARIEL facility to triple the radioactive ion beam production at TRIUMF. A compact Nier-Johnson type of pre-separator has been designed to achieve a mass resolving power of 300 in order to minimize the undesired radioactive species contaminating the downstream beamlines. It consists of a 112 degree magnetic and a 90 degree toroidal electrostatic dipole with deflection in opposite direction. It also contains electrostatic quadrupole elements in between the dipoles. The electrostatic dipole compensates the energy dispersion of the magnetic dipole. This allows an achromatic mode of operation resulting in a high mass resolving power downstream to the electrostatic deflector even for beams with a high energy spread. We present the result of beam optics calculations for the ARIEL pre-separator.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2017-MOPIK056
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WEOBB1	Recirculated Electron Beam Photo-Converter for Rare Isotope Production	2526
	A. Laxdal, R.A. Baartman, I.V. Bylinskii, S. Ganesh, A. Gottberg, F.W. Jones, P. Kunz, L.A. Lopera, T. Planche, A. Sen TRIUMF, Vancouver, Canada
	The TRIUMF 50 MeV electron linac has the potential to drive cw beams of up to 0.5 MW to the ARIEL photo-fission facility for rare isotope science. Due to the cooling requirements, the use of a thick Bremsstrahlung target for electron to photon conversion is a difficult technical challenge in this intensity regime. Here we present a different concept in which electrons are injected into a small storage ring to make multiple passes through a thin internal photo-conversion target, eventually depositing their remaining energy in a cooled central core absorber. We discuss the design requirements and propose a set of design parameters for the Fixed Field Alternating Gradient (FFAG) ring. Using particle simulation models, we estimate various beam properties, as well as the MPS for the electron loss.
	Slides WEOBB1 [4.650 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2017-WEOBB1
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Paper

Title

Page

Simulation Study of Halo Collimation in the TRIUMF Ariel Proton Beam Line

557

F.W. Jones, R.A. Baartman, I.V. Bylinskii, Y.-N. Rao
TRIUMF, Vancouver, Canada

Funding: Funded under a contribution agreement with NRC (National Research Council of Canada). Capital funding from CFI (Canada Foundation for Innovation).
The TRIUMF 500 MeV H⁻ cyclotron uses stripping foil extraction to drive several proton beam lines serving different experimental programs. As part of TRIUMF's Ariel facility now under construction, a new proton beam line 4-North will be installed to transport up to 100 microamps of 480 MeV protons to an ISOL target station for rare isotope beam production. This beam line has been designed for low-loss (< 1nA/m) operation and provides space for a collimator to remove the beam halo produced by large-angle scattering in the cyclotron extraction foil. We have studied proton loss patterns and collimation efficiency using simulation codes: the older REVMOC program and a fully 3D simulation based on Geant4, with all particle interactions in matter included. Scattering in the foil is treated by a separate iterated single-scatter model. Using these tools we arrive at a prototype design for an effective collimator.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2017-MOPIK028

Export •

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

MOPIK056

On the Ariel Pre-Separator

648

S. Saminathan, R.A. Baartman
TRIUMF, Vancouver, Canada

Funding: Funded under a contribution agreement with NRC (National Research Council Canada) and Capital funding from CFI (Canada Foundation for Innovation).
Two new independent target ion sources with dedicated pre-separators will be built in the ARIEL facility to triple the radioactive ion beam production at TRIUMF. A compact Nier-Johnson type of pre-separator has been designed to achieve a mass resolving power of 300 in order to minimize the undesired radioactive species contaminating the downstream beamlines. It consists of a 112 degree magnetic and a 90 degree toroidal electrostatic dipole with deflection in opposite direction. It also contains electrostatic quadrupole elements in between the dipoles. The electrostatic dipole compensates the energy dispersion of the magnetic dipole. This allows an achromatic mode of operation resulting in a high mass resolving power downstream to the electrostatic deflector even for beams with a high energy spread. We present the result of beam optics calculations for the ARIEL pre-separator.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2017-MOPIK056

Export •

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

WEOBB1

Recirculated Electron Beam Photo-Converter for Rare Isotope Production

2526

A. Laxdal, R.A. Baartman, I.V. Bylinskii, S. Ganesh, A. Gottberg, F.W. Jones, P. Kunz, L.A. Lopera, T. Planche, A. Sen
TRIUMF, Vancouver, Canada

The TRIUMF 50 MeV electron linac has the potential to drive cw beams of up to 0.5 MW to the ARIEL photo-fission facility for rare isotope science. Due to the cooling requirements, the use of a thick Bremsstrahlung target for electron to photon conversion is a difficult technical challenge in this intensity regime. Here we present a different concept in which electrons are injected into a small storage ring to make multiple passes through a thin internal photo-conversion target, eventually depositing their remaining energy in a cooled central core absorber. We discuss the design requirements and propose a set of design parameters for the Fixed Field Alternating Gradient (FFAG) ring. Using particle simulation models, we estimate various beam properties, as well as the MPS for the electron loss.

Slides WEOBB1 [4.650 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2017-WEOBB1

Export •

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