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High Temperature Material Processes (An International Quarterly of High-Technology Plasma Processes)

An International Journal

ISSN for PRINT: 1093-3611

Institutional price:	$604.00
Issues per year:	4

Best Paper Award Selection - Editorial Board Site

2002, Volume6

125 pages

Issue price - $144.00

INFLUENCE OF LIGHT CONTAMINANTS ON PROPERTIES OF AN ION BEAM EMITTED FROM LASER-PRODUCED HIGH-Z PLASMA

J. Wolowski
Institute of Plasma Physics and Laser Microfusion, 23 Eery St (23), 00-908 Warsaw, Poland

J. Badziak
Institute of Plasma Physics and Laser Microfusion, 23 Eery St (23), 00-908 Warsaw, Poland

P. Parys
Institute of Plasma Physics and Laser Micro fusion, 23 Eery St (23), 00-908 Warsaw, Poland

E. Woryna
Institute of Plasma Physics and Laser Micro fusion, 23 Eery St (23), 00-908 Warsaw, Poland

J. Krasa
Joint Research Laboratory PALS of the Institute of Plasma Physics, Academy of Science of the Czech Republic, Za Slovankom 3, 182 21 Prague 8, Czech Republik

L. Laska
Joint Research Laboratory PALS of the Institute of Plasma Physics, Academy of Science of the Czech Republic, Za Slovankom 3, 182 21 Prague 8, Czech Republik

K. Rohlena
Joint Research Laboratory PALS of the Institute of Physics and Institute of Plasma Physics, Acad. Sci. CR, Za Slovankou 3,182 21 Praha 8, Czech Republic

L. Ando
INFN-Laboratori Nazionale del Sud, Catania, Italy

S. Gammino
INFN-Laboratori Nazionale del Sud, Via S.Sofia 44, 95123, Catania, Italy

ABSTRACT

The results of investigation of light contaminant ions emission from tungsten target, irradiated with a medium laser intensity (∼5 × 10¹¹ W/cm²) are presented. The ion measurements were based on the time-of-flight method and were performed with the use of ion collectors and an electrostatic ion-energy analyzer. Ion collector signals show two groups of ions (thermal and fast ions) the existence of which corresponds to different ion species. The faster ion group contains only light contaminants, mainly H⁺, С⁺, О⁺, С²⁺, and О²⁺. The slower ion group contains W ions only. The 1^st laser shot on a fresh target surface generates a large amount of contaminant ions and it should be treated as a laser cleaning shot It was estimated that a number of successive laser shots onto the target under our experimental conditions does not essentially change the properties of the ion beam.