The KONUS IH-DTL proposal for the GSI UNILAC poststripper linac replacement

8th International Particle Accelerator Conference

Hähnel, H.^1 ; Ratzinger, U.^1 ; Tiede, R.^1

Institute of Applied Physics, Goethe University, Frankfurt, Germany^1

关键词: Cost effective;    Full transmissions;    Future energies;    Injection parameters;    Low emittance;    Magnetic quadrupoles;    Optimized designs;    RF amplifiers;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/874/1/012047/pdf
DOI  :  10.1088/1742-6596/874/1/012047

来源: IOP

【 摘 要 】

Motivated by the necessary replacement of the GSI UNILAC poststripper linac, a compact and efficient linac design based on IH-type cavities has been developed. Using KONUS beam dynamics, it was possible to design a linac consisting of only five cavities that can be operated by the existing UNILAC RF amplifier structure. The transversal focusing scheme is based on magnetic quadrupole triplet lenses. The optimized design provides full transmission and low emittance growth for the design current of 15 emA U28+, accelerating the beam from 1.4 MeV/u to 11.4 MeV/u. Extensive error studies were performed to define tolerances and verify the stability of the design with respect to misalignment and injection parameters. The design provides a compact and cost effective alternative to a new Alvarez linac. With a total length of just 22.8 meters it will leave room for future energy upgrades in the UNILAC tunnel.