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Title: Neutral atomic jet generation by laser ablation of copper targets

This work aimed the obtainment of a neutral atomic jet departing from a plume generated by laser ablation of copper targets. A pair of electrodes together with a transducer pressure sensor was used to study the ablated plume charge composition and also to measure the ion extraction from the plasma plume. The neutral beam was produced with this setup and the relative abundance of neutrals in the plasma was measured, it decreases from 30% to 8% when the laser fluence is varied from 20 J/cm{sup 2} to 32 J/cm{sup 2}. The necessary voltage to completely remove the ions from the plume varied from 10 V to 230 V in the same fluence range. TOF analysis resulted in center of mass velocities between 3.4 and 4.6 km/s, longitudinal temperature in the range from 1 × 10{sup 4} K to 2.4 × 10{sup 4} K and a Mach number of M = 2.36, calculated using purely hydrodynamic expansion approximation.
Authors:
;  [1] ; ;  [2]
  1. Department of Physics, Technological Institute for Aeronautics – ITA/DCTA, São José dos Campos, P.O. Box 6050, 12.228-900 Sao Paulo (Brazil)
  2. Photonics Division, Institute for Advanced Studies – IEAv/DCTA, São José dos Campos, P.O. Box 6044, 12.231-970 Sao Paulo (Brazil)
Publication Date:
OSTI Identifier:
22314657
Resource Type:
Journal Article
Resource Relation:
Journal Name: Review of Scientific Instruments; Journal Volume: 85; Journal Issue: 8; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; ABLATION; ABUNDANCE; ATOMIC BEAMS; CENTER-OF-MASS SYSTEM; COPPER; ELECTRIC POTENTIAL; ELECTRODES; HYDRODYNAMICS; LASER BEAM MACHINING; MACH NUMBER; PLASMA; PLUMES; SENSORS; TRANSDUCERS