Beam halo in mismatched proton beams.

Conference · Tue Jan 01 04:00:00 EST 2002

OSTI ID:976400

Allen, C K ^[1]; Chan, D ^[2]; Crandall, K R ^[3]; Qiang, J ^[4]; Garnett, R W ^[5]; Lysenko, W P ^[6]; Gilpatrick, J D ^[7]; Schneider, J D ^[8]; Schulze, M E ^[9]; Sheffield, R L ^[10]; Smith, H V ^[11]

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1. Christopher K.
2. Dominic
3. Kenneth R.
4. Ji
5. Robert W.
6. Walter P.
7. John Douglas
8. J. David
9. Martin E.
10. Richard L.
11. Horace V.

Progress was made during the past decade towards a better understanding of halo formation caused by beam mismatch in high-intensity beams. To test these ideas an experiment was carried out at Los Alamos with proton beams in a 52-quadrupole focusing channel. Rms emittances and beam widths were obtained from measured beam profiles for comparison with the maximum emittance growth predictions of a free-energy model and the maximum haloamplitude predictions of a particle-core model. The experimental results are also compared with multiparticle simulations. In this paper we will present the experimental results and discuss the implications with respect to the validity of both the models and the simulations. Keywords: beam halo, emittance growth, beam profiles, simulations, space charge, mismatch

• Research Organization: Los Alamos National Laboratory
• Sponsoring Organization: DOE
• OSTI ID: 976400
• Report Number(s): LA-UR-02-6584
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
BEAM PROFILES
CHARGED PARTICLES
FOCUSING
FREE ENERGY
LOS ALAMOS
OPTICS
PARTICLE-CORE COUPLING MODEL
PROTON BEAMS
SPACE CHARGE