Longitudinal emittance in high-current ion accelerators

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

DOI:https://doi.org/10.1109/PAC.1989.72913· OSTI ID:5990052

Wangler, T P; Bhatia, T S; Neuschaefer, G H; Pabst, M

The control of longitudinal emittance in an ion linear accelerator is important for minimizing both chromatic aberrations and beam halo. The root-mean-square (rms) longitudinal emittance grouth can result from either the nonlinear rf focusing fields or the nonlinear space-charge fields. We will present conclusions based on numerical beam-dynamics studies for both the radio-frequency quadrupole (RFQ), and the drift-tube linac (DTL). We will discuss the scaling of longitudinal emittance produced during the adiabatic bunching in an RFQ and will show the benefits of ramped DTL accelerating field designs to maintain high longitudinal focusing strength with increasing particle energy. 15 refs., 8 figs.

• Research Organization: Los Alamos National Lab., NM (USA)
• DOE Contract Number: W-7405-ENG-36
• OSTI ID: 5990052
• Report Number(s): LA-UR-89-1550; CONF-890335-176; ON: DE89012609
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
430200* -- Particle Accelerators-- Beam Dynamics
Field Calculations
& Ion Optics
ACCELERATORS
BEAM BUNCHING
BEAM DYNAMICS
BEAM EMITTANCE
LINEAR ACCELERATORS
MATHEMATICAL SPACE
PHASE SPACE
RF SYSTEMS
SPACE
SPACE CHARGE