6533b86efe1ef96bd12cb38b
RESEARCH PRODUCT
Simulation of H- ion source extraction systems for the Spallation Neutron Source with Ion Beam Simulator.
Robert F WeltonMartin P. StockliOlli TarvainenBaoxi HanTaneli Kalvassubject
Materials scienceIon beamta114Ion gunIon sourceComputational physicsIon beam depositionRadio-frequency quadrupolePhysics::Accelerator PhysicsNeutron sourceSpallationAtomic physicsInstrumentationSpallation Neutron Sourcedescription
A three-dimensional ion optical code IBSimu, which is being developed at the University of Jyväskylä, features positive and negative ion plasma extraction models and self-consistent space charge calculation. The code has been utilized for modeling the existing extraction system of the H(-) ion source of the Spallation Neutron Source. Simulation results are in good agreement with experimental data. A high-current extraction system with downstream electron dumping at intermediate energy has been designed. According to the simulations it provides lower emittance compared to the baseline system at H(-) currents exceeding 40 mA. A magnetic low energy beam transport section consisting of two solenoids has been designed to transport the beam from the alternative electrostatic extraction systems to the radio frequency quadrupole.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2012-03-03 | The Review of scientific instruments |