Laser plasma ablation of carbon

Dollinger, G.; Frey, C.M.; Maier-Komor, P.

doi:10.1016/0168-9002(93)90546-t

Cited by 18 publications

(13 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Thus, carbon foils should be best suited for this application. The highest possible homogenous density [13,14] combined to practically amorphous structure [15] is presented by foils prepared by laser plasma ablation. Laser plasma carbon foils not really have an amorphous structure but the randomly oriented nanocrystals consist only of a few atoms.…”

Section: Application Of Thick Carbon Stripper Foilsmentioning

confidence: 99%

“…By using an empirical formula from the measurements of Ref. [6] the deposition time T (min) as a function of carbon layer thickness t (mg=cm 2 ) defines the laser power density L (GW=cm 2 ). Of coarse the deposition rate depends also on the source to substrate distance d (cm) according to…”

Section: Laser and The Optical Systemmentioning

confidence: 99%

“…They were not done to improve the quality of the stripper foils, which is determined by the random orientation of the nanocrystals and thus is already at an optimum, but in order to improve the production of the laser plasma ablation carbon foils (lpa carbon foils). In 1992 an ultrahigh vacuum apparatus was developed for serial production [6]. During the routine work for lpa carbon stripper foils, several improvements could be implemented which proved their reproducibility and everyday qualification by the feedback of many users around the world.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Preparation and investigation of thick carbon foils prepared by laser plasma ablation deposition

Maier-Komor

Dollinger

Krücken

2006

Nuclear Instruments and Methods in Physics Research Section A:

Self Cite

View full text Add to dashboard Cite

Section: Application Of Thick Carbon Stripper Foilsmentioning

confidence: 99%

Section: Laser and The Optical Systemmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Preparation and investigation of thick carbon foils prepared by laser plasma ablation deposition

Maier-Komor

Dollinger

Krücken

2006

Nuclear Instruments and Methods in Physics Research Section A:

Self Cite

View full text Add to dashboard Cite

“…In the former case pure graphite was irradiated by a 30 GW/cm 2 Nd: YAG laser for about 10 ns. 40,41 The ablated single C atoms with an average energy of a few eV were collected on a thin betaine film which had a fine crystallinelike structure that acted as a replica for the graphite film and guaranteed a high mechanical stability. For a detailed description of the rather sophisticated preparation of the selfsupporting foils we refer to Ref.…”

Section: The Graphite Targetsmentioning

confidence: 99%

Anisotropy of the electron momentum density of graphite studied by(γ,eγ)and(e,2e)spectroscopy

et al. 2001

Self Cite

View full text Add to dashboard Cite

The electron momentum density ͑EMD͒ of two different modifications of graphite has been measured and the results of the measurements have been compared with theoretical calculations from three different theories: a full potential linear muffin-tin orbital, a modified augmented plane wave, and a pseudopotential calculation. Experimental results have been obtained by two different methods. The complete three-dimensional EMD is determined by inelastic photon-electron scattering, i.e., by the so-called (␥,e␥) experiment, and by electronelectron scattering, the (e,2e) experiment, cuts in the spectral electron momentum density are studied. For the (␥,e␥) experiment 180 keV synchrotron radiation from the PETRA storage ring at the Deutsches Elektronen-Synchrotron has been used with coincident detection of the recoil electrons. The (e,2e) experiments were carried out at the new (e,2e) spectrometer at the Australian National University using 40 keV primary electron energy and simultaneous detection of the outgoing electrons in an equal energy sharing mode. As samples we have prepared approximately 20 nm thin self-supporting graphite foils either by thermal evaporation ͑TE͒ or by laser plasma ablation ͑LPA͒. They are thin enough to suppress in essence electron multiple scattering. Electron diffraction analysis revealed that the LPA foil contains graphitic basal planes with a random distribution of c axes, whereas the TE foil was strongly c-axis oriented in the sense that the basal planes were parallel to the foil surface. In the analysis of the results special attention was devoted to anisotropies in the EMD revealed by comparison of TE and LPA foils. The (e,2e) measurements showed furthermore a strong orientation dependence of the intensity of and states ͑here we have for comparison additionally measured highly oriented pyrolytic graphite͒. The EMD's obtained by both techniques show anisotropies in the momentum distribution of graphite and are discussed in view of the theoretical results.

show abstract

“…[5][6][7][8][9][10][11][12] However, the underlying physics and chemistry of the processes such as carbon cluster formation or their dissociation are less than well understood. Further, the details of the dynamics of laser interaction with materials are extremely important in the context of optimizing the conditions for depositing good quality thin films.…”

Section: Introductionmentioning

confidence: 99%

Emission characteristics and dynamics of C2 from laser produced graphite plasma

Harilal

Issac

Bindhu

et al. 1997

Journal of Applied Physics

View full text Add to dashboard Cite

The emission features of laser ablated graphite plume generated in a helium ambient atmosphere have been investigated with time and space resolved plasma diagnostic technique. Time resolved optical emission spectroscopy is employed to reveal the velocity distribution of different species ejected during ablation. At lower values of laser fluences only a slowly propagating component of C2 is seen. At high fluences emission from C2 shows a twin peak distribution in time. The formation of an emission peak with diminished time delay giving an energetic peak at higher laser fluences is attributed to many body recombination. It is also observed that these double peaks get modified into triple peak time of flight distribution at distances greater than 16 mm from the target. The occurrence of multiple peaks in the C2 emission is mainly due to the delays caused from the different formation mechanism of C2 species. The velocity distribution of the faster peak exhibits an oscillating character with distance from the target surface.

show abstract

Laser plasma ablation of carbon

Cited by 18 publications

References 8 publications

Preparation and investigation of thick carbon foils prepared by laser plasma ablation deposition

Preparation and investigation of thick carbon foils prepared by laser plasma ablation deposition

Anisotropy of the electron momentum density of graphite studied by(γ,eγ)and(e,2e)spectroscopy

Emission characteristics and dynamics of C2 from laser produced graphite plasma

Contact Info

Product

Resources

About