Beam Halo formation and loss induced by image-charge effects in a small-aperture alternating-gradient focusing system

Conference · Thu May 01 00:00:00 EDT 2003

OSTI ID:815519

Zhou, J; Qian, B L; Chen, C; Henestroza, E; Eylon, S; Yu, S

Effects of image charges on beam halo formation and beam loss in small-aperture alternating-gradient focusing systems are studied analytically, computationally, and experimentally. Nonlinear image-charge fields result in chaotic particle motion and the ejection of particles from the beam core into a halo. Detailed chaotic particle motion and structure of the particle phase space is studied, and the beam loss rate is computed for a long transport channel. Image-charge effects are also studied for a short transport channel, and compared with the Neutralized Transport Experiment (NTX) at LBNL.

• Research Organization: Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
• Sponsoring Organization: USDOE Director, Office of Science. Fusion Energy Sciences (US)
• DOE Contract Number: AC03-76SF00098
• OSTI ID: 815519
• Report Number(s): LBNL-53082; HIFAN 1249; R&D Project: Z46010; TRN: US0304645
• Resource Relation: Conference: Particle Accelerator Conference PAC 03, Portland, OR (US), 05/12/2003--05/16/2003; Other Information: PBD: 1 May 2003
• Country of Publication: United States
• Language: English

Related Subjects

32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
43 PARTICLE ACCELERATORS
ACCELERATORS
FOCUSING
PHASE SPACE
TRANSPORT