Model of a SNS Electrostatic LEBT with a Near-Ground Beam Chopper
- Spallation Neutron Source, Oak Ridge National Laboratory, Oak Ridge, TN 37831 (United States)
The low energy beam transport (LEBT) of the Spallation Neutron Source (SNS) accelerator consists of two electrostatic lenses, of which the second is split into four electrically-isolated segments. Adding fast pulsed voltages to the lens high voltage creates the transverse fields required for beam chopping. Electric sparks, however, create transients that enter the fast high-voltage switches, which are occasionally damaged and cause machine downtime. This work models a new configuration of the electrostatic LEBT, which chops the beam with four shielded, near-ground electrodes between the two lenses. The model shows that the new configuration can match the RFQ injection requirements and sufficiently deflect the beam in the phase-space using the same chopping voltages as in the baseline LEBT.
- OSTI ID:
- 21269123
- Journal Information:
- AIP Conference Proceedings, Vol. 1097, Issue 1; Conference: 1. international symposium on negative ions, beams and sources, Aix-en-Provence (France), 9-12 Sep 2008; Other Information: DOI: 10.1063/1.3112537; (c) 2009 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0094-243X
- Country of Publication:
- United States
- Language:
- English
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