Mechanical design and fabrication of the transverse field focusing (TFF) matching/pumping section for negative ion based neutral beam systems

Conference · Fri Nov 01 00:00:00 EST 1985

OSTI ID:6049841

Purgalis, P; Anderson, O A; Koehler, G W; Maruyama, Y; Matuk, C A; Owren, H M; Paterson, J A; Wandesforde, A H

A negative ion based neutral beam injection system is under development as proof-of-principle demonstration of a radiation-hardened beamline. The beamline consists of a source, a pre-accelerator, a matching/pumping (M/P) section, and an accelerator. The function of the M/P section is to provide vacuum pumping, to remove electrons, to provide beam edge confinement, to compress the beam thickness to match the requirements of the accelerator, and to transport the 1A, 80 keV, 25 cm high H ribbon beam to the accelerator entrance. Details of the design and fabrication of the M/P section are presented. The M/P section has eight separate, high voltage electrodes forming an ''S'' shaped beam path. Electrons are removed by the electron trap in this path. Beam edge confinement and thickness compression is accomplished by the curvature and face contour of the electrodes. Design heat loads are described. Electrode fabrication is discussed, and the cryopumps used are described. (LEW)

• Research Organization: Lawrence Berkeley Lab., CA (USA)
• DOE Contract Number: AC03-76SF00098
• OSTI ID: 6049841
• Report Number(s): LBL-19524; CONF-851102-80; ON: DE86005460
• Resource Relation: Conference: 11. symposium on engineering problems in fusion research, Austin, TX, USA, 18 Nov 1985; Other Information: Portions of this document are illegible in microfiche products
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
ACCELERATORS
BEAM SHAPING
CRYOPUMPS
COOLING LOAD
ELECTRODES
ELECTRONS
FABRICATION
HYDROGEN IONS 1 MINUS
NEUTRAL ATOM BEAM INJECTION
ANIONS
BEAM INJECTION
CHARGED PARTICLES
ELEMENTARY PARTICLES
EQUIPMENT
FERMIONS
HYDROGEN IONS
IONS
LABORATORY EQUIPMENT
LEPTONS
PUMPS
VACUUM PUMPS
430302* - Particle Accelerators- Injection & Extraction Systems