Title :
Charge stripper and MEBT for the 3He RFQ accelerator
Author :
Bieniosek, F.M. ; Anderson, K. ; Pasquinelli, R.J. ; Popovic, M. ; Schmidt, C.W. ; Webber, R. ; Larson, D.J. ; Young, P.
Author_Institution :
Fermilab, Batavia, IL, USA
Abstract :
The 3He RFQ linac for production of positron-emitting radioactive isotopes accelerates singly-ionized 3He+ ions to an energy of 1 MeV in a 212.5-MHz RFQ. The ions are then stripped to form doubly-ionized 3He++ in a gas-jet stripping cell, and transported by the MEBT to the 425-MHz RFQ string for acceleration to 10.5 MeV. The stripper cell utilizes a mechanical injector to provide gas pulses to a nozzle. The directed gas jet passes across the beam into a scavenge section which pumps away the gas. The MEBT is an achromatic, isochronous transport section based on two 270-degree bend magnets. It provides bunched and focused beam to the 425-MHz RFQ string
Keywords :
beam handling equipment; ion accelerators; linear accelerators; 3He RFQ accelerator; RFQ string; achromatic isochronous transport section; bend magnets; charge stripper; directed gas jet; focused beam; gas pulses; gas-jet stripping cell; mechanical injector; positron-emitting radioactive isotopes; scavenge section; singly-ionized 3He+ ions; stripper cell; Acceleration; Electrons; Helium; Ion accelerators; Ion sources; Isotopes; Laser excitation; Particle beams; Positron emission tomography; Radio frequency;
Conference_Titel :
Particle Accelerator Conference, 1997. Proceedings of the 1997
Conference_Location :
Vancouver, BC
Print_ISBN :
0-7803-4376-X
DOI :
10.1109/PAC.1997.753432
