PAC2013 - List of Authors (Vorobiev, L.G.)

Paper	Title	Page
MOPAC26	Beam Brightness Booster with Ionization Cooling of Superintense Circulating Beams	123
	V.G. Dudnikov, C.M. Ankenbrandt, R.P. Johnson, L.G. Vorobiev Muons, Inc, Illinois, USA
	An increase of intensity and brightness of proton beam by means of charge exchange injection and devices developed for this experiment are considered. First observation of e-p instability, explanation and damping by feed back are discussed. Discovery of “cesiation effect” leading to multiple increase of negative ion emission from gas discharges and development of surface-plasma sources for intense high brightness negative ion beams production are considered. By these developments were prepared a possibility for production of stable “superintense” circulating beam with intensity and brightness fare above space charge limit. A beam brightness booster (BBB) for significant increase of accumulated beam brightness is discussed. New opportunity for simplification of the superintense beam production is promised by developing of nonlinear close to integrable focusing system with broad spread of betatron tune and the broad bend feed back system for e-p instability suppression. Effects of ionization cooling can be used for suppression of the beam particle scattering in the stripping target

MOPBA12	Mitigation of Numerical Noise for Space Charge Calculations in Tracking Codes	198
	L.G. Vorobiev, C.M. Ankenbrandt, T.J. Roberts Muons, Inc, Illinois, USA F. Schmidt CERN, Geneva, Switzerland
	Modern tracking codes have very high requirements to space charge calculations. They should combine the speed of calculations, to be able to track particles for very many turns (LHC accelerator chain, storage rings, etc), and a numerical accuracy and a physical symplecticity. Grid solvers and the modified Green's function algorithms were considered, compared, and the upgrades were suggested.

Paper

Title

Page

Beam Brightness Booster with Ionization Cooling of Superintense Circulating Beams

123

V.G. Dudnikov, C.M. Ankenbrandt, R.P. Johnson, L.G. Vorobiev
Muons, Inc, Illinois, USA

An increase of intensity and brightness of proton beam by means of charge exchange injection and devices developed for this experiment are considered. First observation of e-p instability, explanation and damping by feed back are discussed. Discovery of “cesiation effect” leading to multiple increase of negative ion emission from gas discharges and development of surface-plasma sources for intense high brightness negative ion beams production are considered. By these developments were prepared a possibility for production of stable “superintense” circulating beam with intensity and brightness fare above space charge limit. A beam brightness booster (BBB) for significant increase of accumulated beam brightness is discussed. New opportunity for simplification of the superintense beam production is promised by developing of nonlinear close to integrable focusing system with broad spread of betatron tune and the broad bend feed back system for e-p instability suppression. Effects of ionization cooling can be used for suppression of the beam particle scattering in the stripping target

MOPBA12

Mitigation of Numerical Noise for Space Charge Calculations in Tracking Codes

198

L.G. Vorobiev, C.M. Ankenbrandt, T.J. Roberts
Muons, Inc, Illinois, USA
F. Schmidt
CERN, Geneva, Switzerland

Modern tracking codes have very high requirements to space charge calculations. They should combine the speed of calculations, to be able to track particles for very many turns (LHC accelerator chain, storage rings, etc), and a numerical accuracy and a physical symplecticity. Grid solvers and the modified Green's function algorithms were considered, compared, and the upgrades were suggested.