CANCELLED Microwave Ion Source and Beam Injection for anAccelerator-Driven Neut ron Source
An over-dense microwave driven ion source capable of producing deuterium (or hydrogen) beams at 100-200 mA/cm{sup 2} and with atomic fraction > 90% was designed and tested with an electrostatic low energy beam transport section (LEBT). This ion source was incorporated into the design of an Accelerator Driven Neutron Source (ADNS). The other key components in the ADNS include a 6 MeV RFQ accelerator, a beam bending and scanning system, and a deuterium gas target. In this design a 40 mA D{sup +} beam is produced from a 6 mm diameter aperture using a 60 kV extraction voltage. The LEBT section consists of 5 electrodes arranged to form 2 Einzel lenses that focus the beam into the RFQ entrance. To create the ECR condition, 2 induction coils are used to create {approx} 875 Gauss on axis inside the source chamber. To prevent HV breakdown in the LEBT a magnetic field clamp is necessary to minimize the field in this region. Matching of the microwave power from the waveguide to the plasma is done by an autotuner. They observed significant improvement of the beam quality after installing a boron nitride liner inside the ion source. The measured emittance data are compared with PBGUNS simulations.
- Research Organization:
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
- Sponsoring Organization:
- USDOE. Administrator for National Nuclear Security AdminNonproliferation and National Security Program Direction
- DOE Contract Number:
- DE-AC02-05CH11231
- OSTI ID:
- 932684
- Report Number(s):
- LBNL-62514-Ext.-Abs.; R&D Project: Z2IS10 AND Z2IS14; TRN: US0803732
- Resource Relation:
- Conference: Proceedings of the PAC07, Albuquerque, NM,06/25-29/2007
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ACCELERATORS
APERTURES
BEAM INJECTION
BEAM TRANSPORT
BENDING
BORON NITRIDES
BREAKDOWN
DESIGN
DEUTERIUM
ELECTRODES
ELECTROSTATICS
HYDROGEN
INDUCTION
ION SOURCES
LENSES
LINERS
MAGNETIC FIELDS
NEUTRON SOURCES
WAVEGUIDES
_Ion Source External RF-antenna Planar inductive source Plasmasource