Beam Neutralization in the Scaled Final Focus Experiment
نویسندگان
چکیده
A series of implicit, electrostatic, twoand threedimensional, particle-in-cell simulations are used to model heavy ion beam neutralization and focusing in the Scaled Final Focus Experiment at the Lawrence Berkeley National Laboratory. The simulations confirm the charge neutralizing effect of electrons introduced into the beam path as the beam is focused and exiting the accelerator.
منابع مشابه
Preliminary Results from a Scaled Final Focus Experiment for Heavy Ion Inertial Fusion
Vacuum ballistic focusing may be a straightforward method to obtain the heavy ion beam spot size necessary to drive an inertial confinement fusion target. Proper scaling of particle energy, mass, beam current, beam emittance, and magnetic field replicates the dynamics of a full driver beam in a small laboratory experiment. By expanding the beam and then focusing to a very small spot, the effect...
متن کاملLbnl-54472 Scientific Issues in Future Induction Linac Accelerators for Heavy Ion Fusion
The worldwide heavy ion fusion effort has made a large amount of progress over almost three decades of research on the intense beam physics and concepts needed for an inertial fusion driver. In the 1970’s, ‘80’s, and ‘90’s in the U.S., most experiments used driver parameters scaled to low energy and low line charge density in order to study, most often with a single beam, the physics of high-pe...
متن کاملA Scaled Beam-combining Experiment for Heavy Ion Inertial Fusion
Transverse beam combining is a cost-saving option employed in many designs for induction linac heavy ion fusion drivers. The resultant transverse emittance increase, due predominantly to anharmonic space charge forces, must be kept minimal so that the beam remains focusable at the target. A prototype combining experiment has been built and preliminary results are presented. Four sources each pr...
متن کاملPolarized Positrons at a Future Linear Collider and the Final Focus Test Beam
Having both the positron and electron beams polarized in a future linear e+e−collider is a decisive improvement for many physics studies at such a machine. The motivation for polarized positrons, and a demonstration experiment for the undulator-based production of polarized positrons are reviewed. This experiment (‘E-166’) uses the 50 GeV Final Focus Test electron beam at SLAC with a 1 m-long h...
متن کاملECR Plasma Source for Heavy Ion Beam Charge Neutralization*
Philip C. Efthimion, Erik Gilson, Larry Grisham, Pavel Kolchin and Ronald C. Davidson Plasma Physics Laboratory Princeton University, Princeton, New Jersey, 08543, USA Simon Yu and B. Grant Logan Lawrence Berkeley National Laboratory University of California, Berkeley, California, 94720, USA Highly ionized plasmas are being considered as a medium for charge neutralizing heavy ion beams in order...
متن کامل