Title :
Characterization of the proton beam from the 6.7 MeV LEDA RFQ
Author :
Schulze, M.E. ; Allen, C.K. ; Colestock, P.L. ; Gilpatrick, J.D. ; Lysenko, W. ; Rybarcyk, L.J. ; Schneider, J.D. ; Sheffield, R.L. ; Smith, H.V. ; Wangler, T.P. ; Crandall, K.R.
Author_Institution :
Gen. Atomics, Los Alamos, NM, USA
Abstract :
The present configuration of the Low-Energy Demonstration Accelerator (LEDA) consists of a 75-keV proton injector, a 6.7-MeV 350-MHz cw radio-frequency quadrupole (RFQ) with associated high-power and low level rf systems, a 52-magnet periodic lattice followed by a short high-energy beam transport (HEBT) and high-power (670-kW cw) beam stop. The rms beam emittance was measured prior to the installation of the 52-magnet lattice, based on wire-scanner measurements of the beam profile at a single location in the HEBT. New measurements with additional diagnostic hardware have been performed to determine the rms transverse beam properties of the beam at the output of the 6.7-MeV LEDA RFQ. The 52-magnet periodic lattice also includes ten beam position monitors (BPMs) evenly spaced in pairs of two. The BPMs provide a measure of the bunched beam current that exhibits nulls at different locations in the lattice. Model predictions of the locations of the nulls and the strength of the bunched beam current are made to determine what information this data can provide regarding the longitudinal beam emittance
Keywords :
accelerator RF systems; accelerator magnets; electromagnets; high energy physics instrumentation computing; linear accelerators; particle beam bunching; particle beam diagnostics; particle beam injection; proton accelerators; proton beams; 350 MHz; 6.7 MeV; 670 kW; 75 keV; BPM; HEBT; LEDA RFQ; Low-Energy Demonstration Accelerator; RFQ; beam emittance; beam position monitors; beam profile; beam stop; bunched beam current; diagnostic hardware; high-energy beam transport; high-power rf systems; low level rf systems; periodic lattice magnet; proton beam; proton injector; radiofrequency quadrupole; transverse beam properties; wire-scanner measurements; Current measurement; Lattices; Linear particle accelerator; Magnetic field measurement; Magnets; Particle beam injection; Particle beams; Phase measurement; Predictive models; Space charge;
Conference_Titel :
Particle Accelerator Conference, 2001. PAC 2001. Proceedings of the 2001
Conference_Location :
Chicago, IL
Print_ISBN :
0-7803-7191-7
DOI :
10.1109/PAC.2001.987577
