Title :
Study of space charge compensated LEBT for ESS
Author :
Lakatos, A. ; Pozimski, J. ; Meusel, O. ; Jakob, A. ; Klein, H.
Author_Institution :
Inst. fur Angewandte Phys., Frankfurt Univ., Germany
Abstract :
To fulfil the requirements of ESS on beam transmission and emittance growth a detailed knowledge of the physics of beam formation as well as the interaction of the H with the residual gas is substantial. Space charge compensated beam transport using solenoids for ion optics is in favour for the Low Energy Beam Transport (LEBT) between ion source and the first RFQ. Space charge compensation reduces the electrical self fields and beam radii and therefore emittance growth due to aberrations and redistribution. Transport of H near the ion source is negatively influenced by the dipole fields required for beam extraction and e-dumping and the high gas pressure. The destruction of the rotational symmetry together with the space charge forces causes emittance growth and particle losses within the extraction system. High residual gas pressure near the extractor together with cross section for stripping will influence the transmission as well as space charge compensation
Keywords :
beam handling equipment; beam handling techniques; ion optics; neutron sources; particle beam extraction; space charge; ESS; Low Energy Beam Transport; beam extraction; beam formation; beam radii; beam transmission; dipole fields; electrical selffields; emittance growth; ion optics; particle losses; residual gas; space charge compensated LEBT; Electronic switching systems; Filters; Ion beams; Ion sources; Magnetic separation; Particle beams; Plasma displays; Plasma sources; Solenoids; Space charge;
Conference_Titel :
Particle Accelerator Conference, 1999. Proceedings of the 1999
Conference_Location :
New York, NY
Print_ISBN :
0-7803-5573-3
DOI :
10.1109/PAC.1999.795524
