Measurements of stability limits for a space-charge-dominated ion beam in a long A. G. Transport channel

Conference · Tue Oct 01 00:00:00 EDT 1985 · IEEE Trans. Nucl. Sci.; (United States)

OSTI ID:6111831

Tiefenback, M G; Keefe, D

The Single Beam Transport Experiment at LBL consists of 82 electrostatic quadrupole lenses arranged in a FODO lattice. Five further lenses provide a matched beam from a high-current high-brightness cesium source for injection into the FODO channel. We call the transport conditions stable if both the emittance and current remain unchanged between the beginning and end of the channel, and unstable if either the emittance grows or the current decreases because of collective effects. We have explored the range of single-particle betatron phase advance per period from sigma/sub 0/ = 45/sup 0/ to 150/sup 0/ to determine the stability limits for the space-charge depressed phase advance, sigma. No lower limit for sigma (down to 7/sup 0/) has been found at sigma/sub 0/ = 60/sup 0/, whereas limits have clearly been identified and mapped in the region of sigma/sub 0/ above 90/sup 0/.

• Research Organization: Lawrence Berkeley Laboratory, University of California, Berkeley, CA
• OSTI ID: 6111831
• Report Number(s): CONF-850504-
• Journal Information: IEEE Trans. Nucl. Sci.; (United States), Vol. NS-32:5; Conference: Particle accelerator conference, Vancouver, Canada, 13 May 1985
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
ION BEAMS
BEAM TRANSPORT
INSTABILITY GROWTH RATES
SPACE CHARGE
BEAM CURRENTS
BEAM FOCUSING MAGNETS
BEAM INJECTION
CESIUM
ELECTROSTATIC LENSES
LINEAR ACCELERATORS
MEASURING METHODS
PARTICLE BEAMS
QUADRUPOLES
ACCELERATORS
ALKALI METALS
BEAMS
CURRENTS
ELECTRICAL EQUIPMENT
ELECTROMAGNETS
ELEMENTS
EQUIPMENT
LENSES
MAGNETS
METALS
MULTIPOLES
430200* - Particle Accelerators- Beam Dynamics
Field Calculations
& Ion Optics
430302 - Particle Accelerators- Injection & Extraction Systems