Mechanical design and fabrication of the transverse field focusing (TFF) matching/pumping section for negative ion based neutral beam systems
Abstract
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)
- Authors:
- Publication Date:
- Research Org.:
- Lawrence Berkeley Lab., CA (USA)
- OSTI Identifier:
- 6049841
- Report Number(s):
- LBL-19524; CONF-851102-80
ON: DE86005460
- DOE Contract Number:
- AC03-76SF00098
- Resource Type:
- Conference
- 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
- Subject:
- 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
Citation Formats
Purgalis, P, Anderson, O A, Koehler, G W, Maruyama, Y, Matuk, C A, Owren, H M, Paterson, J A, and Wandesforde, A H. Mechanical design and fabrication of the transverse field focusing (TFF) matching/pumping section for negative ion based neutral beam systems. United States: N. p., 1985.
Web.
Purgalis, P, Anderson, O A, Koehler, G W, Maruyama, Y, Matuk, C A, Owren, H M, Paterson, J A, & Wandesforde, A H. Mechanical design and fabrication of the transverse field focusing (TFF) matching/pumping section for negative ion based neutral beam systems. United States.
Purgalis, P, Anderson, O A, Koehler, G W, Maruyama, Y, Matuk, C A, Owren, H M, Paterson, J A, and Wandesforde, A H. 1985.
"Mechanical design and fabrication of the transverse field focusing (TFF) matching/pumping section for negative ion based neutral beam systems". United States. https://www.osti.gov/servlets/purl/6049841.
@article{osti_6049841,
title = {Mechanical design and fabrication of the transverse field focusing (TFF) matching/pumping section for negative ion based neutral beam systems},
author = {Purgalis, P and Anderson, O A and Koehler, G W and Maruyama, Y and Matuk, C A and Owren, H M and Paterson, J A and Wandesforde, A H},
abstractNote = {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)},
doi = {},
url = {https://www.osti.gov/biblio/6049841},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Fri Nov 01 00:00:00 EST 1985},
month = {Fri Nov 01 00:00:00 EST 1985}
}