Actions for A low-frequency RFQ for a low-charge-state injector for ATLAS [electronic resource].

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A low-frequency RFQ for a low-charge-state injector for ATLAS [electronic resource].

Published
Washington, D.C. : United States. Dept. of Energy. Office of Energy Research, 1996.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy.
Physical Description
5 pages : digital, PDF file
Additional Creators
Argonne National Laboratory, United States. Department of Energy. Office of Energy Research, and United States. Department of Energy. Office of Scientific and Technical Information
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Summary
A design for a split-coaxial, normally-conducting, 12 MHz RFQ structure is being developed to accelerate singly charged ions of mass 132 and heavier to a velocity v/c = 0.008, suitable for injection into the ATLAS superconducting heavy-ion linac. Numerical studies have shown that a transverse (normalized) acceptance of 0.25 π mm-mrad can be achieved while maintaining a longitudinal emittance as small as a few keV-nsec. A novel feature is the use of drift-tubes at the entrance and exit of the RFQ which make use of the voltage offsets intrinsic to the split-coaxial structure to increase the voltage gain by about 30%. A half-scale model of the RFQ has been built and tested. The model, with no provision for cooling, was not operable cw but was pulsed to vane-vane voltages as high as 59 kV for periods of several milliseconds. The achieved level, limited by arcing in an rf feedthrough and so not a fundamental limit for the structure, corresponds to 1.2 times the (frequency and gap dependent) Kilpatrick limit. Assuming the model results scale, a 2 meter long 12 MHz RFQ, with 8 mm minimum aperture radius, will operate at 100 kV intervane voltage with an RF input of slightly less than 25 kW. Design and construction status of a full-scale prototype is discussed.
Report Numbers
E 1.99:anl/phy/cp--90694
E 1.99: conf-9608123--50
conf-9608123--50
anl/phy/cp--90694
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Note
Published through SciTech Connect.
12/31/1996.
"anl/phy/cp--90694"
" conf-9608123--50"
"DE97000687"
18. international linac conference, Geneva (Switzerland), 26-30 Aug 1996.
Shepard, K.W.; Sellyey, W.C.
Funding Information
W-31109-ENG-38
View MARC record | catkey: 14692699