Beam tests of the 12 MHz RFQ RIB injector for ATLAS

• Main Authors: Kaye, R.A., Shepard, K.W., Clifft, B.E., Kedzie, M.
• Format: Conference Proceeding
• Language: English
• Subjects: 430100 - Particle Accelerators- Design, Development, & Operation; 430301 - Particle Accelerators- Ion Sources; ACCELERATORS; ATLAS SUPERCONDUCTING LINAC; BEAM INJECTION; BEAM TRANSPORT; BEAMS; CAVITY RESONATORS; ELECTRONIC EQUIPMENT; HEAVY ION ACCELERATORS; ION BEAMS; ISOTOPE SEPARATION; LINEAR ACCELERATORS; PARTICLE ACCELERATORS; RADIOACTIVE ION BEAMS; RESONATORS; RF SYSTEMS; SEPARATION PROCESSES; SUPERCONDUCTING CAVITY RESONATORS; SUPERCONDUCTING DEVICES
• ISSN: 0094-243X; 1551-7616

In recent tests without beam, the Argonne 12 MHz split-coaxial radio-frequency quadrupole (RFQ) achieved a cw intervane voltage of more than 100 kV, the design operating voltage for the device. This voltage is sufficient for the RFQ to function as the first stage of a RIB injector for the Argonne Tandem Linear Accelerator System (ATLAS). Previously reported beam dynamics calculations for the structure predict longitudinal emittance growth of only a few keV[center dot]ns for beams of mass 132 and above with transverse emittance of 0.27[pi] hthinsp;mm[center dot]mrad (normalized). Such beam quality is not typical of RFQ devices. The work reported here is preparation for tests with beams of mass up to 132. Beam diagnostic stations are being developed to measure the energy gain and beam quality of heavy ions accelerated by the RFQ using the Dynamitron accelerator facility at the ANL Physics Division as the injector. Beam diagnostic development includes provisions for performing the measurements with both a Si charged-particle detector and an electrostatic energy spectrometer system. [copyright] [ital 1999 American Institute of Physics.]