Title :
RF amplifier choice for the ISAC superconducting linac
Author :
Bylinskii, I. ; Fong, K. ; Lu, J. ; Mitra, A.K. ; Owen, C.
Author_Institution :
TRIUMF, Vancouver
Abstract :
A superconducting linac is being commissioned at TRIUMF as an extension to the existing room temperature accelerator of exotic ions at ISAC. It will increase the isotope final energy from 1.5 to 6.5 MeV/u. Acceleration is accomplished in 40 bulk niobium quarter wave superconducting cavities operating at 106 and 141 MHz. Each cavity is energized from an independent RF amplifier with power rating up to 1 kW cw. Both vacuum tube and solid-state amplifiers were considered as a viable option for the drivers. The paper compares many important parameters of these 2 amplifiers such as reliability, serviceability, capital and maintenance costs, as well as operating characteristics: gain linearity, phase noise, phase drift and others. Test results of prototypes of both types of amplifiers and 1-year operational experience of 20 tube amplifiers are discussed. Based on that the amplifier design recommendations are formulated.
Keywords :
accelerator RF systems; accelerator cavities; linear accelerators; proton accelerators; prototypes; radiofrequency amplifiers; reliability; superconducting devices; vacuum tubes; ISAC superconducting linac; RF amplifier; TRIUMF; amplifier design recommendations; exotic ions; gain linearity; maintenance costs; niobium quarter wave superconducting cavity; phase drift; phase noise; prototypes; reliability; serviceability; solid-state amplifiers; temperature 293 K to 298 K; vacuum tube; Acceleration; Electron tubes; Ion accelerators; Isotopes; Linear particle accelerator; Niobium; Operational amplifiers; Radiofrequency amplifiers; Solid state circuits; Temperature;
Conference_Titel :
Particle Accelerator Conference, 2007. PAC. IEEE
Conference_Location :
Albuquerque, NM
Print_ISBN :
978-1-4244-0916-7
DOI :
10.1109/PAC.2007.4439910
