The beam bunching and transport system of the Argonne positive ion injector

Conference · Sun Jan 01 04:00:00 EST 1989

OSTI ID:6156920

Den Hartog, P K; Bogaty, J M; Bollinger, L M; Clifft, B E; Pardo, R C; Shepard, K W

A new positive ion injector (PII) is currently under construction at Argonne that will replace the existing 9-MV tandem electrostatic accelerator as an injector into ATLAS. It consists of an electron-cyclotron resonance-ion source on a 350-kV platform injecting into a superconducting linac optimized for very slow (..beta.. less than or equal to .007 c) ions. This combination can potentially produce even higher quality heavy-ion beams than are currently available from the tandem since the emittance growth within the linac is largely determined by the quality of the bunching and beam transport. The system we have implemented uses a two-stage bunching system, composed of a 4-harmonic gridded buncher located on the ECR high-voltage platform and a room temperature spiral-loaded buncher of novel design. A sinusoidal beam chopper is used for removal of tails. The beam transport is designed to provide mass resolution of M/..delta..M > 250 and a doubly-isochronous beamline is used to minimize time spread due to path length differences. 4 refs., 2 figs.

• Research Organization: Argonne National Lab., IL (USA)
• DOE Contract Number: W-31109-ENG-38
• OSTI ID: 6156920
• Report Number(s): CONF-890335-47; ON: DE89009775
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
430301 -- Particle Accelerators-- Ion Sources
430302* -- Particle Accelerators-- Injection & Extraction Systems
ACCELERATORS
ATLAS SUPERCONDUCTING LINAC
BEAM BUNCHING
BEAM DYNAMICS
BEAM INJECTION
BEAM OPTICS
BEAM TRANSPORT
HEAVY ION ACCELERATORS
ION SOURCES
LINEAR ACCELERATORS
PERFORMANCE