Title :
Comparison of beam simulations with measurements for the LEDA LEBT H+ beam
Author :
Smith, H. Vernon, Jr. ; Figueroa, Terry ; Hansborough, Lash D. ; Harrington, Margye ; Johnson, Kenneth ; Kerstiens, Debora ; Nath, Subrata ; Sherman, Joseph D. ; Stevens, Ralph R., Jr. ; Thuot, Michael ; Young, Lloyd M. ; Zaugg, Thomas J. ; Arvin, Adrian
Author_Institution :
Los Alamos Nat. Lab., NM, USA
Abstract :
The Low-Energy Demonstration Accelerator (LEDA) injector is designed to provide 75-keV, 110-mA, proton beams for the LEDA RFQ. After testing the LEDA injector using a 1.25-MeV, CW RFQ, we shortened the low-energy beam transport (LEBT) to 2.69 m, replaced the first LEBT solenoid with one that has a shorter length but the same focusing power, and installed and operated the LEDA injector in the beam tunnel. In this paper we use the TRACE, SCHAR, and PARMELA computer codes to model the proton beam for the as-installed LEBT and we compare the results of these simulations with the LEBT beam measurements. We use the computer code PARMTEQM to transport the SCHAR- and PARMELA- generated beams through the RFQ so that we can compare the predicted RFQ performance with the measured RFQ performance. For a 100-mA, 0.239-π-mm-mrad input beam, PARMTEQM predicts the LEDA RFQ transmission will be 92.2%
Keywords :
accelerator magnets; electromagnets; high energy physics instrumentation computing; linear accelerators; particle beam diagnostics; particle beam focusing; particle beam injection; proton accelerators; proton beams; 1.25 MeV; 100 mA; 110 mA; 2.69 m; 75 keV; CW RFQ; H; LEDA LEBT H+ beam; LEDA injector; Low-Energy Demonstration Accelerator; PARMELA code; PARMTEQM code; SCHAR code; TRACE code; beam measurements; beam simulations; focusing power; low-energy beam transport; proton beams; solenoid; Computational modeling; Fasteners; Hydrogen; Laboratories; Particle beam measurements; Particle beams; Phase measurement; Predictive models; Rivers; Solenoids;
Conference_Titel :
Particle Accelerator Conference, 1999. Proceedings of the 1999
Conference_Location :
New York, NY
Print_ISBN :
0-7803-5573-3
DOI :
10.1109/PAC.1999.794317
