IPAC2012 - List of Authors (McIntyre, P.M.)

Paper

Title

Page

Thorium Energy Futures

29

S. Peggs, W. Horak, T. Roser
BNL, Upton, Long Island, New York, USA
V.B. Ashley, R.F. Ashworth
Jacobs Engineering, Pasadena, USA
R.J. Barlow, R. Cywinski, R. Seviour
University of Huddersfield, Huddersfield, United Kingdom
J.-L. Biarrotte
IPN, Orsay, France
S. Henderson
Fermilab, Batavia, USA
A. Hutton
JLAB, Newport News, Virginia, USA
J. Kelly
Thor Energy, Oslo, Norway
M. Lindroos
ESS, Lund, Sweden
P.M. McIntyre
Texas A&M University, College Station, Texas, USA
A. Norlin
IThEO, Sweden
H.L. Owen
STFC/DL/ASTeC, Daresbury, Warrington, Cheshire, United Kingdom
G.T. Parks
University of Cambridge, Cambridge, United Kingdom

The potential for thorium as an alternative or supplement to uranium in fission power generation has long been recognised, and several reactors, of various types, have already operated using thorium-based fuels. Accelerator Driven Subcritical (ADS) systems have benefits and drawbacks when compared to conventional critical thorium reactors, for both solid and molten salt fuels. None of the four options – liquid or solid, with or without an accelerator – can yet be rated as better or worse than the other three, given today's knowledge. We outline the research that will be necessary to lead to an informed choice.

Slides MOOBA01 [3.887 MB]

MOPPD033

Strong-focusing Cyclotron - High-current Applications

436

P.M. McIntyre, S. Assadi, K.E. Badgley, C. Collins, J. Comeaux, R. Garrison, J.N. Kellams, T.L. Mann, A.D. McInturff, N. Pogue, A. Sattarov
Texas A&M University, College Station, Texas, USA

Funding: This work is supported by grants from the State of Texas (ASE) and from the Mitchell Family Foundation.
Quadrupole focusing channels are integrated into the pole faces of a superconducting sector cyclotron, to enable control of the betatron tunes for all orbits. This provision makes it possible to lock the tunes to desired values for all orbits, thereby eliminating resonance crossing and facilitating local orbit bumps for injection and extraction. Optical control is of particular importance for applications where higher beam current is desired, for ADS fission drivers, for spallation neutron sources, and for medical isotope production.

MOPPD034

Flux-coupled Stacking of Cyclotrons for a High-power ADS Fission Driver

439

A. Sattarov, S. Assadi, K.E. Badgley, J.N. Kellams, T.L. Mann, A.D. McInturff, P.M. McIntyre, N. Pogue
Texas A&M University, College Station, Texas, USA

Funding: This work is funded by grants from the State of Texas (ASE) and the Mitchell Family Foundation.
The sector magnets for an isochronous cyclotron are configured as a flux-coupled stack of apertures, each forming an independent cyclotron, separated sufficiently to accommodate independent superconducting rf cavities. The stack strategy makes it possible to deliver any amount of proton beam power consistent with the limitations of each individual cyclotron, and to deliver the aggregate power to a number of spallation targets as dictated by optimum coupling for accelerator-driven subcritical (ADS) fission and by limitations in target transfer.

TUPPD047

Injection Sequence for High-power Isochronous Cyclotrons for ADS Fission

1509

S. Assadi, K.E. Badgley, C. Collins, J. Comeaux, R. Garrison, P.M. McIntyre, A. Sattarov
Texas A&M University, College Station, Texas, USA

Funding: This work is supported by grants from the State of Texas (ASE) and the Mitchell Family Foundation.
A high-current injector sequence is being developed for use in a flux-coupled stack of high-current cyclotrons for accelerator-driven subcritical (ADS) fission. The design includes an ECR ion source, LEBT, RF quadrupole, and multi-stage chopper. A first cyclotron then accelerates the beams to 100 MeV for injection to the sector isochronous cyclotron. Provisions for control of emittance and bunch tails are described.

WEPPC063

Superconducting RF Cavity for High-current Cyclotrons

2354

N. Pogue, P.M. McIntyre, A. Sattarov
Texas A&M University, College Station, Texas, USA

Funding: This work is supported by grants from the State of Texas (ASE) and the Mitchell Family Foundation.
A novel superconducting cavity is presented for applications in cyclotrons. The cavity is in effect an extrusion of a 2-D double-quarter-wave structure, in which the ends of the extrusion are wrapped around and joined so that the cavity has no end perturbations. Power is applied to a linear array of input coupling loops, so that rf sheet current is launched in a laminar flow that matches the power coupled to the orbits of the cyclotron. Each loop is driven by an independent solid-state rf source. A strategy is presented for using to advantage the independent control of phase and amplitude to suppress transient phenomena. Longitudinal modes can be strongly suppressed. These provisions are of importance to suppress phenomena that can limit beam current.

Paper	Title	Page
MOOBA01	Thorium Energy Futures	29
	S. Peggs, W. Horak, T. Roser BNL, Upton, Long Island, New York, USA V.B. Ashley, R.F. Ashworth Jacobs Engineering, Pasadena, USA R.J. Barlow, R. Cywinski, R. Seviour University of Huddersfield, Huddersfield, United Kingdom J.-L. Biarrotte IPN, Orsay, France S. Henderson Fermilab, Batavia, USA A. Hutton JLAB, Newport News, Virginia, USA J. Kelly Thor Energy, Oslo, Norway M. Lindroos ESS, Lund, Sweden P.M. McIntyre Texas A&M University, College Station, Texas, USA A. Norlin IThEO, Sweden H.L. Owen STFC/DL/ASTeC, Daresbury, Warrington, Cheshire, United Kingdom G.T. Parks University of Cambridge, Cambridge, United Kingdom
	The potential for thorium as an alternative or supplement to uranium in fission power generation has long been recognised, and several reactors, of various types, have already operated using thorium-based fuels. Accelerator Driven Subcritical (ADS) systems have benefits and drawbacks when compared to conventional critical thorium reactors, for both solid and molten salt fuels. None of the four options – liquid or solid, with or without an accelerator – can yet be rated as better or worse than the other three, given today's knowledge. We outline the research that will be necessary to lead to an informed choice.
	Slides MOOBA01 [3.887 MB]

MOPPD033	Strong-focusing Cyclotron - High-current Applications	436
	P.M. McIntyre, S. Assadi, K.E. Badgley, C. Collins, J. Comeaux, R. Garrison, J.N. Kellams, T.L. Mann, A.D. McInturff, N. Pogue, A. Sattarov Texas A&M University, College Station, Texas, USA
	Funding: This work is supported by grants from the State of Texas (ASE) and from the Mitchell Family Foundation. Quadrupole focusing channels are integrated into the pole faces of a superconducting sector cyclotron, to enable control of the betatron tunes for all orbits. This provision makes it possible to lock the tunes to desired values for all orbits, thereby eliminating resonance crossing and facilitating local orbit bumps for injection and extraction. Optical control is of particular importance for applications where higher beam current is desired, for ADS fission drivers, for spallation neutron sources, and for medical isotope production.

MOPPD034	Flux-coupled Stacking of Cyclotrons for a High-power ADS Fission Driver	439
	A. Sattarov, S. Assadi, K.E. Badgley, J.N. Kellams, T.L. Mann, A.D. McInturff, P.M. McIntyre, N. Pogue Texas A&M University, College Station, Texas, USA
	Funding: This work is funded by grants from the State of Texas (ASE) and the Mitchell Family Foundation. The sector magnets for an isochronous cyclotron are configured as a flux-coupled stack of apertures, each forming an independent cyclotron, separated sufficiently to accommodate independent superconducting rf cavities. The stack strategy makes it possible to deliver any amount of proton beam power consistent with the limitations of each individual cyclotron, and to deliver the aggregate power to a number of spallation targets as dictated by optimum coupling for accelerator-driven subcritical (ADS) fission and by limitations in target transfer.

TUPPD047	Injection Sequence for High-power Isochronous Cyclotrons for ADS Fission	1509
	S. Assadi, K.E. Badgley, C. Collins, J. Comeaux, R. Garrison, P.M. McIntyre, A. Sattarov Texas A&M University, College Station, Texas, USA
	Funding: This work is supported by grants from the State of Texas (ASE) and the Mitchell Family Foundation. A high-current injector sequence is being developed for use in a flux-coupled stack of high-current cyclotrons for accelerator-driven subcritical (ADS) fission. The design includes an ECR ion source, LEBT, RF quadrupole, and multi-stage chopper. A first cyclotron then accelerates the beams to 100 MeV for injection to the sector isochronous cyclotron. Provisions for control of emittance and bunch tails are described.

WEPPC063	Superconducting RF Cavity for High-current Cyclotrons	2354
	N. Pogue, P.M. McIntyre, A. Sattarov Texas A&M University, College Station, Texas, USA
	Funding: This work is supported by grants from the State of Texas (ASE) and the Mitchell Family Foundation. A novel superconducting cavity is presented for applications in cyclotrons. The cavity is in effect an extrusion of a 2-D double-quarter-wave structure, in which the ends of the extrusion are wrapped around and joined so that the cavity has no end perturbations. Power is applied to a linear array of input coupling loops, so that rf sheet current is launched in a laminar flow that matches the power coupled to the orbits of the cyclotron. Each loop is driven by an independent solid-state rf source. A strategy is presented for using to advantage the independent control of phase and amplitude to suppress transient phenomena. Longitudinal modes can be strongly suppressed. These provisions are of importance to suppress phenomena that can limit beam current.