Beam dynamics of a double-gap acceleration cell for ion implantation with multiple atomic species
- Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States)
- Eaton Corporation, Semiconductor Equipment Operation, 108 Cherry Hill Drive, Beverly, Massachusetts 01915 (United States)
As a result of our work on ion implantation, we derived equations for the beam dynamics of a two-gap-resonator cavity for accelerating and bunching various ion species of varying energies with the cavity designed for one particular ion species of a given energy (the design-reference particle). A two gap structure is useful at low resonant frequencies where lumped circuit elements (inductors) can be used and the structure kept small. A single gap structure has the advantage that each gap can be independently phased to produce the desired beam dynamics behavior for various ion species and ion energies. However at low frequencies, single gap resonant structures can be large. We find that the two-gap structure, where the phase difference between gaps, for the design reference particle, is fixed at {pi} radians can give acceptable performance provided that the individual two gap cells in the entire accelerator are optimized for the ion species having the largest mass to charge ratio and having the maximum required output energy. Our equations show how to adjust the cavity phases and electric fields to obtain equivalent first-order accelerator performance for various ion species and energies. These equations allow for the effective evaluation of various accelerator concepts and can facilitate the tuning of a linac when changing energies and ion species. Extensive simulations have confirmed the efficacy of our equations. {copyright} {ital 1997 American Institute of Physics.}
- Sponsoring Organization:
- USDOE
- OSTI ID:
- 570250
- Report Number(s):
- CONF-961110-; ISSN 0094-243X; TRN: 98:003614
- Journal Information:
- AIP Conference Proceedings, Vol. 392, Issue 1; Conference: 14. international conference on the application of accelerators in research and industry, Denton, TX (United States), 6-9 Nov 1996; Other Information: PBD: Feb 1997
- Country of Publication:
- United States
- Language:
- English
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