PAC2013 - List of Authors (Zvyagintsev, V.)

Paper	Title	Page
THPAC01	Longitudinal Emittance Measurement System for the ARIEL Electron Linac	1139
	A.R. Vrielink, Y.-C. Chao, C. Gong, R.E. Laxdal, V. Zvyagintsev TRIUMF, Canada's National Laboratory for Particle and Nuclear Physics, Vancouver, Canada
	As part of the ARIEL e-LINAC project at TRIUMF, a 1.3 GHz single-cell, room-temperature deflecting cavity has been developed to study the temporal distribution of an electron beam from a 300 kV thermionic gun. Beam bunches on the order of 100-200 ps long are produced from a biased grid with a 650MHz RF voltage superimposed to periodically allow release of electrons. The RF deflector operates in a TM110-like mode, deflecting the electrons vertically with a magnitude dependent on their arrival phase. The cavity RF performance has been characterized through signal level and beam testing. The deflector is installed as part of a longitudinal emittance measurement system with beam collimation, a 90 degree analyzing magnet, the deflecting cavity and a final view screen. Initial beam bunch length measurements using this RF cavity, conducted in conjunction with the initial commissioning using a 100kV electron-gun and a 1.3GHz buncher, are presented. The beam bunch length was extracted by comparing data collected at a screen downstream of the deflector to an analytical model based on linear time-invariant system theory and 3D simulation results using General Particle Tracer.

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

Longitudinal Emittance Measurement System for the ARIEL Electron Linac

1139

A.R. Vrielink, Y.-C. Chao, C. Gong, R.E. Laxdal, V. Zvyagintsev
TRIUMF, Canada's National Laboratory for Particle and Nuclear Physics, Vancouver, Canada

As part of the ARIEL e-LINAC project at TRIUMF, a 1.3 GHz single-cell, room-temperature deflecting cavity has been developed to study the temporal distribution of an electron beam from a 300 kV thermionic gun. Beam bunches on the order of 100-200 ps long are produced from a biased grid with a 650MHz RF voltage superimposed to periodically allow release of electrons. The RF deflector operates in a TM110-like mode, deflecting the electrons vertically with a magnitude dependent on their arrival phase. The cavity RF performance has been characterized through signal level and beam testing. The deflector is installed as part of a longitudinal emittance measurement system with beam collimation, a 90 degree analyzing magnet, the deflecting cavity and a final view screen. Initial beam bunch length measurements using this RF cavity, conducted in conjunction with the initial commissioning using a 100kV electron-gun and a 1.3GHz buncher, are presented. The beam bunch length was extracted by comparing data collected at a screen downstream of the deflector to an analytical model based on linear time-invariant system theory and 3D simulation results using General Particle Tracer.

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.