The Experts below are selected from a list of 50979 Experts worldwide ranked by ideXlab platform
E. M. Campbell - One of the best experts on this subject based on the ideXlab platform.
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subpercent scale control of 3d low modes of targets imploded in direct drive configuration on omega
Physical Review Letters, 2018Co-Authors: D T Michel, D. H. Edgell, V. N. Goncharov, Igor V. Igumenshchev, D H Froula, D Jacobsperkins, S P Regan, A Shvydky, A K Davis, E. M. CampbellAbstract:: Multiple self-emission x-ray images are used to measure tomographically target modes 1, 2, and 3 up to the end of the target acceleration in direct-drive implosions on OMEGA. Results show that the modes consist of two components: the first varies linearly with the Laser Beam-Energy balance and the second is static and results from physical effects including Beam mistiming, mispointing, and uncertainty in Beam energies. This is used to reduce the target low modes of low-adiabat implosions from 2.2% to 0.8% by adjusting the Beam-Energy balance to compensate these static modes.
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subpercent scale control of 3d low modes of targets imploded in direct drive configuration on omega
Physical Review Letters, 2018Co-Authors: D T Michel, D. H. Edgell, V. N. Goncharov, Igor V. Igumenshchev, D H Froula, D Jacobsperkins, S P Regan, A Shvydky, A K Davis, E. M. CampbellAbstract:: Multiple self-emission x-ray images are used to measure tomographically target modes 1, 2, and 3 up to the end of the target acceleration in direct-drive implosions on OMEGA. Results show that the modes consist of two components: the first varies linearly with the Laser Beam-Energy balance and the second is static and results from physical effects including Beam mistiming, mispointing, and uncertainty in Beam energies. This is used to reduce the target low modes of low-adiabat implosions from 2.2% to 0.8% by adjusting the Beam-Energy balance to compensate these static modes.
Sabine J Becker - One of the best experts on this subject based on the ideXlab platform.
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metal imaging on surface of micro and nanoelectronic devices by Laser ablation inductively coupled plasma mass spectrometry and possibility to measure at nanometer range
Journal of the American Society for Mass Spectrometry, 2009Co-Authors: Myroslav V Zoriy, Dirk Mayer, Sabine J BeckerAbstract:An analytical mass spectrometric method for the elemental analysis of nano-bioelectronic devices involved in bioengineering research was developed and applied for measurements of selected metals (Au, Ti, Pt, Cr, etc. ) on interdigitated electrode array chips (IDA-chip). An imaging Laser ablation inductively coupled plasma mass spectrometric (LA-ICP-MS) procedure was used to map the elements of interest on the surface of the analyzed sample. The obtained images of metals were in a good agreement and corresponded to the micro- and nanofabricated metal electrode pattern. For the analysis at nanometer resolution scale a NF-LA-ICP-MS (NF-near-field) procedure was applied, which utilize thin Ag needle to enhance Laser Beam Energy and improve spatial resolution of the method. The results show a ∼100× enhancement of analyte signal, when the needle was positioned in the “near-field region” to the sample surface and the Laser shot was performed. In addition, mass spectrometric studies of reproducibly for five separated NF-LA shots in different places of analyzed sample yielded an RSD of the measurement of 16%.
D T Michel - One of the best experts on this subject based on the ideXlab platform.
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subpercent scale control of 3d low modes of targets imploded in direct drive configuration on omega
Physical Review Letters, 2018Co-Authors: D T Michel, D. H. Edgell, V. N. Goncharov, Igor V. Igumenshchev, D H Froula, D Jacobsperkins, S P Regan, A Shvydky, A K Davis, E. M. CampbellAbstract:: Multiple self-emission x-ray images are used to measure tomographically target modes 1, 2, and 3 up to the end of the target acceleration in direct-drive implosions on OMEGA. Results show that the modes consist of two components: the first varies linearly with the Laser Beam-Energy balance and the second is static and results from physical effects including Beam mistiming, mispointing, and uncertainty in Beam energies. This is used to reduce the target low modes of low-adiabat implosions from 2.2% to 0.8% by adjusting the Beam-Energy balance to compensate these static modes.
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subpercent scale control of 3d low modes of targets imploded in direct drive configuration on omega
Physical Review Letters, 2018Co-Authors: D T Michel, D. H. Edgell, V. N. Goncharov, Igor V. Igumenshchev, D H Froula, D Jacobsperkins, S P Regan, A Shvydky, A K Davis, E. M. CampbellAbstract:: Multiple self-emission x-ray images are used to measure tomographically target modes 1, 2, and 3 up to the end of the target acceleration in direct-drive implosions on OMEGA. Results show that the modes consist of two components: the first varies linearly with the Laser Beam-Energy balance and the second is static and results from physical effects including Beam mistiming, mispointing, and uncertainty in Beam energies. This is used to reduce the target low modes of low-adiabat implosions from 2.2% to 0.8% by adjusting the Beam-Energy balance to compensate these static modes.
Myroslav V Zoriy - One of the best experts on this subject based on the ideXlab platform.
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metal imaging on surface of micro and nanoelectronic devices by Laser ablation inductively coupled plasma mass spectrometry and possibility to measure at nanometer range
Journal of the American Society for Mass Spectrometry, 2009Co-Authors: Myroslav V Zoriy, Dirk Mayer, Sabine J BeckerAbstract:An analytical mass spectrometric method for the elemental analysis of nano-bioelectronic devices involved in bioengineering research was developed and applied for measurements of selected metals (Au, Ti, Pt, Cr, etc. ) on interdigitated electrode array chips (IDA-chip). An imaging Laser ablation inductively coupled plasma mass spectrometric (LA-ICP-MS) procedure was used to map the elements of interest on the surface of the analyzed sample. The obtained images of metals were in a good agreement and corresponded to the micro- and nanofabricated metal electrode pattern. For the analysis at nanometer resolution scale a NF-LA-ICP-MS (NF-near-field) procedure was applied, which utilize thin Ag needle to enhance Laser Beam Energy and improve spatial resolution of the method. The results show a ∼100× enhancement of analyte signal, when the needle was positioned in the “near-field region” to the sample surface and the Laser shot was performed. In addition, mass spectrometric studies of reproducibly for five separated NF-LA shots in different places of analyzed sample yielded an RSD of the measurement of 16%.
Detlef Guenther - One of the best experts on this subject based on the ideXlab platform.
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Depth profile studies of ZrTiN coatings by Laser ablation inductively coupled plasma mass spectrometry
Analytical and Bioanalytical Chemistry, 2004Co-Authors: Viktor Kanický, Hans-rudolf Kuhn, Detlef GuentherAbstract:The feasibility of depth profiling was studied by using a 193-nm ArF* excimer Laser ablation system (GeoLas, MicroLas, Goettingen, Germany) with a lens array-based Beam homogenizer in combination with an ICP-QMS Agilent 7500. Two ablation cells (20 and 1.5 cm^3) were compared at the Laser repetition rate of 1 Hz, Laser Beam Energy of 135 mJ and the carrier gas flow rate 1.5 L min^−1 He + 0.78 L min^−1 Ar. The ablation cell dimensions are important parameters for signal tailing; however, very small cell volumes (e.g. 1.5 cm^3) may cause memory effects, which can be probably explained by dominant inertial losses of aerosol on cell walls with its delayed mobilization. The 20-cm^3 ablation cell seems to be appropriate for depth profiling by continuous single-hole drilling. The study of the influence of the pit diameter magnitude on the waning and emerging signals under small crater depth/diameter aspect ratios, which range between 0.75 and 0.0375 for the 3-μm-thick coatings and pit diameters 4–80 μm, revealed that the steady-state signals of pure coating and pure substrate (out of interface) were obtained at crater diameters between 20 and 40 μm. Depth resolution defined by means of slopes of tangents in the layer interface region depend on the pit diameter and has an optimum value between 20 and 40 μm and gives 0.6 μm for the 20-μm pit. In-depth variation of concentration of coating constituent (Ti) was proved to be almost identical with two different Laser/ICP systems.
