Cyclotrons2016 - List of Authors (Bylinskii, I.V.)

Paper	Title	Page
TUA04	Recent Improvements in Beam Delivery with the TRIUMF's 500 MeV Cyclotron	133
	I.V. Bylinskii, R.A. Baartman, K. Jayamanna, T. Planche, Y.-N. Rao TRIUMF, Canada's National Laboratory for Particle and Nuclear Physics, Vancouver, Canada
	TRIUMF's 500 MeV H⁻ Cyclotron, despite its 44 years age is under continuous development. Many aspects of beam delivery have been improved over the last few years. Regular 3-week cusp source filament exchange cycle has advanced to multi-months due to greatly improved filament life time. Fine source tuning allowed beam intensity rise in support of routine extraction of 300 uA of protons. The injection line model has been fully correlated with online measurements that enabled its tuning and matching to the emittance defining slits and the cyclotron entrance. Cyclotron routinely produces 3 simultaneous high intensity beams (~100 uA each). Multiple techniques have been developed to maintain extracted beams intensity stability within ± 1%. Record extraction foil life times in excess of 500 mA-hours have been demonstrated with highly-oriented pyrolytic graphite foil material and improvements in foil holder. Beam rastering on ISOL target allowed higher yields. A single user extraction at 100 MeV was achieved by applying phase slip and deceleration inside the cyclotron.
	Slides TUA04 [2.911 MB]
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TUP10	A New Concept of High Current Power Supply for the Main Cyclotron Magnet at TRIUMF	186
	S. Carrozza, F. Burini, E. Ferrari, M.P. Pretelli, G.T. Taddia OCEM, Valsamoggia, Italy M.C. Bastos, G. Hudson, Q. King, G. Le Godec CERN, Geneva, Switzerland I.V. Bylinskii, W. L. Louie, R.B. Nussbaumer TRIUMF, Canada's National Laboratory for Particle and Nuclear Physics, Vancouver, Canada
	A sophisticated power supply was studied and de-signed to supply a high current to the main magnet of the TRIUMF cyclotron. The power supply will be operated with a current up to 20000 A in DC mode. It has been designed using a modular approach, with a 12-pulse input rectifier and two DC link which feeds sixteen DC/DC chopper modules in parallel connection. The conceived power supply integrates a sophisticated control and a precise current measurement chain devel-oped at CERN for the Large Hadron Collider (LHC). This paper presents the solution described in the de-sign report, the choice of the main purchased components which will lead to a final assembly and test before the end of 2016.
	Poster TUP10 [1.076 MB]
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WEA03	Space-charge Simulation of TRIUMF 500 MeV Cyclotron	254
	T. Planche, R.A. Baartman, I.V. Bylinskii, Y.-N. Rao TRIUMF, Canada's National Laboratory for Particle and Nuclear Physics, Vancouver, Canada
	Funding: TRIUMF also receives federal funding via a contribution agreement through the National Research Council of Canada. We present a method to improve computation efficiency of space charge simulations in cyclotrons. This method is particularly efficient for simulating long bunches where length is large compared to both transverse size and turn separation. We show results of application to space charge effects in the TRIUMF 500 MeV cyclotron.
	Slides WEA03 [3.145 MB]
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THP03	Operation and Maintenance of RF System of 520 MeV TRIUMF Cyclotron	307
	N.V. Avreline, T. Au, C.D. Bartlett, I.V. Bylinskii, B. Jakovljevic, V. Zvyagintsev TRIUMF, Canada's National Laboratory for Particle and Nuclear Physics, Vancouver, Canada C.D. Bartlett University of Victoria, Victoria BC, Canada
	1 MW CW 23 MHz RF system of the TRIUMF 520 MeV Cyclotron has been in operation for over 40 years. Continuous development of the RF power amplifiers, the waveguide system and of the measurement and protection devices provides reliable operation and improves the performance of the RF System. In this article, operation and maintenance procedure of this RF system are analyzed and recent as well as future upgrades are being analyzed and discussed. In particular, we discuss the improvements of the transmission line's VSWR monitor and their effect on the protection of the RF system against RF breakdowns and sparks. We discuss the new version of input circuit that was installed, tested and is currently used in the final stage of RF power amplifier. We analyze various schematics and configurations of the Intermediate Power Amplifier (IPA) to be used in the future. The thermo-condition improvements of the Dee voltage probe's rectifiers are described.
	Poster THP03 [2.215 MB]
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THD03	Recirculating Electron Beam Photo-converter for Rare Isotope Production	383
	A. Laxdal, R.A. Baartman, I.V. Bylinskii, F.W. Jones, T. Planche, A. Sen TRIUMF, Canada's National Laboratory for Particle and Nuclear Physics, Vancouver, Canada G. Ganesh UW/Physics, Waterloo, Ontario, Canada
	Funding: TRIUMF receives federal funding via a contribution agreement through the National Research Council of Canada. ARIEL & e-linac construction are funded by BCKDF and CFI. 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 where they make multiple passes through a thin internal photo-conversion target, eventually depositing their remaining energy in a central core absorber which can be independently cooled. We discuss 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, and electron loss control.
	Slides THD03 [6.773 MB]
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Paper

Title

Page

Recent Improvements in Beam Delivery with the TRIUMF's 500 MeV Cyclotron

133

I.V. Bylinskii, R.A. Baartman, K. Jayamanna, T. Planche, Y.-N. Rao
TRIUMF, Canada's National Laboratory for Particle and Nuclear Physics, Vancouver, Canada

TRIUMF's 500 MeV H⁻ Cyclotron, despite its 44 years age is under continuous development. Many aspects of beam delivery have been improved over the last few years. Regular 3-week cusp source filament exchange cycle has advanced to multi-months due to greatly improved filament life time. Fine source tuning allowed beam intensity rise in support of routine extraction of 300 uA of protons. The injection line model has been fully correlated with online measurements that enabled its tuning and matching to the emittance defining slits and the cyclotron entrance. Cyclotron routinely produces 3 simultaneous high intensity beams (~100 uA each). Multiple techniques have been developed to maintain extracted beams intensity stability within ± 1%. Record extraction foil life times in excess of 500 mA-hours have been demonstrated with highly-oriented pyrolytic graphite foil material and improvements in foil holder. Beam rastering on ISOL target allowed higher yields. A single user extraction at 100 MeV was achieved by applying phase slip and deceleration inside the cyclotron.

Slides TUA04 [2.911 MB]

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TUP10

A New Concept of High Current Power Supply for the Main Cyclotron Magnet at TRIUMF

186

S. Carrozza, F. Burini, E. Ferrari, M.P. Pretelli, G.T. Taddia
OCEM, Valsamoggia, Italy
M.C. Bastos, G. Hudson, Q. King, G. Le Godec
CERN, Geneva, Switzerland
I.V. Bylinskii, W. L. Louie, R.B. Nussbaumer
TRIUMF, Canada's National Laboratory for Particle and Nuclear Physics, Vancouver, Canada

A sophisticated power supply was studied and de-signed to supply a high current to the main magnet of the TRIUMF cyclotron. The power supply will be operated with a current up to 20000 A in DC mode. It has been designed using a modular approach, with a 12-pulse input rectifier and two DC link which feeds sixteen DC/DC chopper modules in parallel connection. The conceived power supply integrates a sophisticated control and a precise current measurement chain devel-oped at CERN for the Large Hadron Collider (LHC). This paper presents the solution described in the de-sign report, the choice of the main purchased components which will lead to a final assembly and test before the end of 2016.

Poster TUP10 [1.076 MB]

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WEA03

Space-charge Simulation of TRIUMF 500 MeV Cyclotron

254

T. Planche, R.A. Baartman, I.V. Bylinskii, Y.-N. Rao
TRIUMF, Canada's National Laboratory for Particle and Nuclear Physics, Vancouver, Canada

Funding: TRIUMF also receives federal funding via a contribution agreement through the National Research Council of Canada.
We present a method to improve computation efficiency of space charge simulations in cyclotrons. This method is particularly efficient for simulating long bunches where length is large compared to both transverse size and turn separation. We show results of application to space charge effects in the TRIUMF 500 MeV cyclotron.

Slides WEA03 [3.145 MB]

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THP03

Operation and Maintenance of RF System of 520 MeV TRIUMF Cyclotron

307

N.V. Avreline, T. Au, C.D. Bartlett, I.V. Bylinskii, B. Jakovljevic, V. Zvyagintsev
TRIUMF, Canada's National Laboratory for Particle and Nuclear Physics, Vancouver, Canada
C.D. Bartlett
University of Victoria, Victoria BC, Canada

1 MW CW 23 MHz RF system of the TRIUMF 520 MeV Cyclotron has been in operation for over 40 years. Continuous development of the RF power amplifiers, the waveguide system and of the measurement and protection devices provides reliable operation and improves the performance of the RF System. In this article, operation and maintenance procedure of this RF system are analyzed and recent as well as future upgrades are being analyzed and discussed. In particular, we discuss the improvements of the transmission line's VSWR monitor and their effect on the protection of the RF system against RF breakdowns and sparks. We discuss the new version of input circuit that was installed, tested and is currently used in the final stage of RF power amplifier. We analyze various schematics and configurations of the Intermediate Power Amplifier (IPA) to be used in the future. The thermo-condition improvements of the Dee voltage probe's rectifiers are described.

Poster THP03 [2.215 MB]

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THD03

Recirculating Electron Beam Photo-converter for Rare Isotope Production

383

A. Laxdal, R.A. Baartman, I.V. Bylinskii, F.W. Jones, T. Planche, A. Sen
TRIUMF, Canada's National Laboratory for Particle and Nuclear Physics, Vancouver, Canada
G. Ganesh
UW/Physics, Waterloo, Ontario, Canada

Funding: TRIUMF receives federal funding via a contribution agreement through the National Research Council of Canada. ARIEL & e-linac construction are funded by BCKDF and CFI.
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 where they make multiple passes through a thin internal photo-conversion target, eventually depositing their remaining energy in a central core absorber which can be independently cooled. We discuss 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, and electron loss control.

Slides THD03 [6.773 MB]

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