Pulsed proton prototype of a high current ion linac

The using of the spatial uniform quadrupole focusing at the initial stages of acceleration proposed approximately 10 years age turned out to be rather fruitful for linac techniques. The accelerators of such type are being designed in several scientific centers, where they are being called RFQ. That abbreviation is fairly convenient, though it is not completely strict because it may include general structures of other types. The practical application of the RFQ accelerating structure in the ITEP is tightly connected with design of a new proton synchrotron injector to replace the obsolescent linac I-2 which was put into operation as long ago as 1966. This will allow placing in the same building an injector with output energy of 40 to 50 MeV instead of the old 24.6 MeV injector and also improvement of the parameters of the proton synchrotron beam. There will be some more improvements in the new injector besides RFQ structure: Alvarez structure will operate with doubled frequency, permanent magnets will be used in drift tubes, linac control will be automatized, and will be connected with the synchrotron computer