PAC2013 - List of Authors (Storey, D.W.)

Paper	Title	Page
THPBA01	Beam Dynamics Driven Requirements on the ARIEL e-linac SRF Separator Cavity	1223
	D.W. Storey Victoria University, Victoria, B.C., Canada Y.-C. Chao, L. Merminga TRIUMF, Canada's National Laboratory for Particle and Nuclear Physics, Vancouver, Canada
	Funding: Natural Sciences and Engineering Research Council of Canada A possible future extension to TRIUMF's ARIEL e-linac is the addition of a recirculation path for an Energy Recovery Linac (ERL), which will drive an Infrared Free Electron Laser (FEL). The ERL electron beam will be interleaved with the single-pass beam bound for Rare Isotope Beam (RIB) production in the ARIEL facilities, allowing for simultaneous beam delivery to both FEL and RIB users. A superconducting RF separator will separate the beams at the exit of the linac at a frequency of 650MHz in CW mode. After a second pass through the linac, the energy recovered ERL beam will pass through the separator cavity out of phase with the deflecting fields, and at a much lower energy, before continuing to a beam dump. Using the General Particle Tracer software, three-dimensional simulations of the beam dynamics of the passing beams have been performed to determine the requirements on the SRF separator's deflecting field uniformity. Operation of the FEL requires minimal emittance dilution of the ERL beam from the separator. This contribution describes the results of these studies and the requirements imposed on the SRF beam separator.

THPBA02	Feasibility of an RF Dipole Cavity for the ARIEL e-linac SRF Separator	1226
	D.W. Storey Victoria University, Victoria, B.C., Canada R.E. Laxdal, L. Merminga, V. Zvyagintsev TRIUMF, Canada's National Laboratory for Particle and Nuclear Physics, Vancouver, Canada
	Funding: Natural Sciences and Engineering Research Council of Canada A megawatt class CW e-linac is being designed and constructed at TRIUMF with the main goal of producing neutron rich isotopes for TRIUMF's Rare Isotope Beam (RIB) program. A possible extension of the beam-line will allow recirculation of the beam for an Energy Recovery Linac (ERL) to operate in tandem with the RIB user program. A superconducting cavity with RF dipole geometry is being considered for separation of the ERL and RIB beams at the end of the linac to provide simultaneous beams to both the ERL and RIB programs. This contribution describes optimization studies performed on the RF dipole design to determine if this geometry will meet the requirements of the ARIEL e-linac. The resulting 650 MHz structure has compact cavity dimensions, low peak fields, and high transverse shunt impedance. Due to the large aperture beam-line and stringent requirement on preserving beam quality, extensive focus has been placed on transverse uniformity of the deflecting fields.

Paper

Title

Page

Beam Dynamics Driven Requirements on the ARIEL e-linac SRF Separator Cavity

1223

D.W. Storey
Victoria University, Victoria, B.C., Canada
Y.-C. Chao, L. Merminga
TRIUMF, Canada's National Laboratory for Particle and Nuclear Physics, Vancouver, Canada

Funding: Natural Sciences and Engineering Research Council of Canada
A possible future extension to TRIUMF's ARIEL e-linac is the addition of a recirculation path for an Energy Recovery Linac (ERL), which will drive an Infrared Free Electron Laser (FEL). The ERL electron beam will be interleaved with the single-pass beam bound for Rare Isotope Beam (RIB) production in the ARIEL facilities, allowing for simultaneous beam delivery to both FEL and RIB users. A superconducting RF separator will separate the beams at the exit of the linac at a frequency of 650MHz in CW mode. After a second pass through the linac, the energy recovered ERL beam will pass through the separator cavity out of phase with the deflecting fields, and at a much lower energy, before continuing to a beam dump. Using the General Particle Tracer software, three-dimensional simulations of the beam dynamics of the passing beams have been performed to determine the requirements on the SRF separator's deflecting field uniformity. Operation of the FEL requires minimal emittance dilution of the ERL beam from the separator. This contribution describes the results of these studies and the requirements imposed on the SRF beam separator.

THPBA02

Feasibility of an RF Dipole Cavity for the ARIEL e-linac SRF Separator

1226

D.W. Storey
Victoria University, Victoria, B.C., Canada
R.E. Laxdal, L. Merminga, V. Zvyagintsev
TRIUMF, Canada's National Laboratory for Particle and Nuclear Physics, Vancouver, Canada

Funding: Natural Sciences and Engineering Research Council of Canada
A megawatt class CW e-linac is being designed and constructed at TRIUMF with the main goal of producing neutron rich isotopes for TRIUMF's Rare Isotope Beam (RIB) program. A possible extension of the beam-line will allow recirculation of the beam for an Energy Recovery Linac (ERL) to operate in tandem with the RIB user program. A superconducting cavity with RF dipole geometry is being considered for separation of the ERL and RIB beams at the end of the linac to provide simultaneous beams to both the ERL and RIB programs. This contribution describes optimization studies performed on the RF dipole design to determine if this geometry will meet the requirements of the ARIEL e-linac. The resulting 650 MHz structure has compact cavity dimensions, low peak fields, and high transverse shunt impedance. Due to the large aperture beam-line and stringent requirement on preserving beam quality, extensive focus has been placed on transverse uniformity of the deflecting fields.