R. VALDIVIEZ, D. BRUHN, J. D. GILPATRICK, H. HAAGENSTAD, R. LAFAVE, J. LEDFORD, F. MARTINEZ, N. PATTERSON (LOS ALAMOS NATIONAL LABORATORY), J. O'HARA (HONEYWELL)
The 6.7 MeV, 100 mA proton beam being produced in the Low Energy Demonstration Accelerator (LEDA) RFQ will be injected into a 52 magnet lattice in order to study the formation of beam halo. The LEDA RFQ beam has a rms size of 1mm. At nine longitudinal locations along the lattice wire scanner and halo scraper assemblies will be placed to probe the beam to measure the projected current-density profile of the beam. Each assembly consists of two axes, X and Y translatable frames. Each frame carries a wire that will be used to scan across the entire beam profile. Each frame also contains two scraping devices, one positioned on each side of the beam tube, that will be used to probe the outer portions of the beam profile in order to detect the beam halo. The peak beam power density that the scraper will need to withstand is 4600 watts/cm**2. This paper discusses the mechanical analyses, design, and testing of the beam profile measuring assembly.
*This work has been sponsored by the US Department of Energy.
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