Abstract
Using a static mass spectrometer, we study the characteristics of multicharge plasma ions generated from solid targets under the action of a 15 nanosecond Nd:YAG laser radiation with maximal intensity 1011 W/cm2. We consider two-element solid targets with a mass of the heavy component ranging from 44.9 (Sc) to 174.9 (Lu) with main attention to the properties of oxygen ions. The time-of-flight measurements show that oxygen ions are obtained in the range of the energy E = 40–250 eV with maximal charge Zmax=2. The latter is independent on the target composition for the given intensity of the laser radiation. However, the properties of the energy spectra of oxygen ions strongly depend on the second component of the target, which is explained by the interaction between the light and heavy elements of the target.
Highlights
At present, there is a number of works devoted to the study of laser-produced plasma as a source of ions for the inertial confinement fusion [1–5] together with heavy ion accelerators and the systems on the base of powerful impulse of electrical charge, that is, Z-pinches
The properties of plasma ions show nonlinear dependence on the intensity of the laser radiation, we present here experimental results obtained for the maximal intensity of the laser radiation q = 1011 W/cm2
We note that maximal charge of both light and heavy components of ions does not depend on the nature of two-element targets for a given intensity of the laser radiation
Summary
There is a number of works devoted to the study of laser-produced plasma as a source of ions for the inertial confinement fusion [1–5] together with heavy ion accelerators and the systems on the base of powerful impulse of electrical charge, that is, Z-pinches. Laser ion source (LIS) has been recently designed [6] to load the Heidelberg electron beam ion trap with a pulsed beam of lowly charged ions from solid elements. Not much attention was given to the low intensity part of the laser radiation (109–1012 W/cm). Not much attention was given to the low intensity part of the laser radiation (109–1012 W/cm2) This regime was shown to be very useful for the material scientists in the fields of material preparation, for example, of thin films of high-Tc superconductors [8]. The laser pulsed-deposition technique shows considerable promise for the fabrication of such films
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