2011 Particle Accelerator Conference - List of Authors (Abell, D.T.)

Paper	Title	Page
WEP254	Simulation of H⁻ Beam Chopping in a Solenoid-Based Low-Energy Beam Transport (LEBT)	1957
	D.T. Abell, D.L. Bruhwiler, Y. Choi, S. Mahalingam, P. Stoltz Tech-X, Boulder, Colorado, USA B. Han ORNL RAD, Oak Ridge, Tennessee, USA M.P. Stockli ORNL, Oak Ridge, Tennessee, USA
	Funding: This work is supported by the US DOE Office of Science, Office of Basic Energy Sciences, including grant No. DE-SC0000844. The H^- linac for the Spallation Neutron Source (SNS) includes an electrostatic low-energy beam transport (LEBT) subsystem. The ion source group at SNS is developing a solenoid-based LEBT, which will include MHz frequency chopping of the partly-neutralized, 65~keV, 60~mA H^- beam. Particle-in-cell (PIC) simulations using the parallel VORPAL framework are being used to explore the possibility of beam instabilities caused by the cloud of neutralizing ions generated from the background gas, or by other dynamical processes that could increase the emittance of the H^- beam before it enters the radio-frequency quadrupole (RFQ) accelerator.

Paper

Title

Page

Simulation of H⁻ Beam Chopping in a Solenoid-Based Low-Energy Beam Transport (LEBT)

1957

D.T. Abell, D.L. Bruhwiler, Y. Choi, S. Mahalingam, P. Stoltz
Tech-X, Boulder, Colorado, USA
B. Han
ORNL RAD, Oak Ridge, Tennessee, USA
M.P. Stockli
ORNL, Oak Ridge, Tennessee, USA

Funding: This work is supported by the US DOE Office of Science, Office of Basic Energy Sciences, including grant No. DE-SC0000844.
The H^- linac for the Spallation Neutron Source (SNS) includes an electrostatic low-energy beam transport (LEBT) subsystem. The ion source group at SNS is developing a solenoid-based LEBT, which will include MHz frequency chopping of the partly-neutralized, 65~keV, 60~mA H^- beam. Particle-in-cell (PIC) simulations using the parallel VORPAL framework are being used to explore the possibility of beam instabilities caused by the cloud of neutralizing ions generated from the background gas, or by other dynamical processes that could increase the emittance of the H^- beam before it enters the radio-frequency quadrupole (RFQ) accelerator.