The Experts below are selected from a list of 2136 Experts worldwide ranked by ideXlab platform
Latina Andrea - One of the best experts on this subject based on the ideXlab platform.
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Simulations of Beam-Beam Interactions With RF-Track for the AWAKE Primary Beam Lines
2017Co-Authors: Schmidt Janet, Latina AndreaAbstract:The AWAKE project at CERN will use a high-energy proton beam at 400 GeV/c to drive wakefields in a plasma. The amplitude of these wakefields will be probed by injecting into the plasma a low-energy electron beam (10-20 MeV/c), which will be accelerated to several GeV. Upstream of the plasma cell the two beams will either be transported coaxially or with an offset of few millimetres for about 6 m. The interaction between the two beams in this beam line has been investigated in the past, with a dedicated simulation code tracking particles under the influence of direct space-charge effects. These simulations have recently been crosschecked with a new simulation code called RF-Track, developed at CERN to simulate low energy accelerators. RF-Track can track Multiple-Specie beams at arbitrary energies, taking into account the full electromagnetic particle-to-particle inter-action. For its characteristics RF-Track seems an ideal tool to study the AWAKE two-beam interaction. The results of these studies are presented in this paper and compared to the previous results. The implications for the facility performance are discussed
Schmidt Janet - One of the best experts on this subject based on the ideXlab platform.
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Simulations of Beam-Beam Interactions With RF-Track for the AWAKE Primary Beam Lines
2017Co-Authors: Schmidt Janet, Latina AndreaAbstract:The AWAKE project at CERN will use a high-energy proton beam at 400 GeV/c to drive wakefields in a plasma. The amplitude of these wakefields will be probed by injecting into the plasma a low-energy electron beam (10-20 MeV/c), which will be accelerated to several GeV. Upstream of the plasma cell the two beams will either be transported coaxially or with an offset of few millimetres for about 6 m. The interaction between the two beams in this beam line has been investigated in the past, with a dedicated simulation code tracking particles under the influence of direct space-charge effects. These simulations have recently been crosschecked with a new simulation code called RF-Track, developed at CERN to simulate low energy accelerators. RF-Track can track Multiple-Specie beams at arbitrary energies, taking into account the full electromagnetic particle-to-particle inter-action. For its characteristics RF-Track seems an ideal tool to study the AWAKE two-beam interaction. The results of these studies are presented in this paper and compared to the previous results. The implications for the facility performance are discussed
Ecological Hotspots - One of the best experts on this subject based on the ideXlab platform.
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Infrastructure’s Effect on Ecology Novel Ecologies
2016Co-Authors: Ecological HotspotsAbstract:a multifunctional dam designed for Multiple Species by matthew blansit Auburn University master of landscape architecture 2014 multifunctional dam designed for Multiple Specie
Costa M:j - One of the best experts on this subject based on the ideXlab platform.
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DNA barcoding: an effective tool to overcome morphological identification constraints in the assessment of the ecological quality
CIbio- Inbio: Community Ecology for 21th Century (Genes to Ecosystems), 2016Co-Authors: Medeiros J.p., Weisberg S. B., Alves M.j., Stein E., Gillett D., Chainho P., Costa J.l., Adão H, Costa M:jAbstract:DNA barcoding has the potential to overcome taxonomic challenges in biological community assessments. However, fulfilling that potential requires successful amplification of a large and unbiased portion of the community. In this study, we attempted to identify mitochondrial gene cytochrome c oxidase I (COI) barcodes from 1024 benthic invertebrate specimens belonging to 54 taxa from low salinity environments of the Mira estuary and Torgal riverside (SW Portugal). Up to 17 primer pairs and several reaction conditions were attempted among specimens from all taxa, with amplification success defined as a single band of approximately 658 bp visualized on a pre-cast agarose gel, starting near the 5' end of the COI gene and suitable for sequencing. Amplification success was achieved for 99.6% of the 54 taxa, though no single primer was successful for more than 88.9% of the taxa. However, only 68.5% of the specimens within these taxa successfully amplified. Inhibition factors resulting from a non-purified DNA extracted and inexistence of Species-specific primers for COI were pointed as the main reasons for an unsuccessful amplification. These results suggest that DNA barcoding can be an effective tool for application in low salinity environments where taxa such as chironomids and oligochaetes are challenging for morphological identification. Nevertheless, its implementation is not simple, as methods are still being standardized and Multiple Specie
Medeiros J.p. - One of the best experts on this subject based on the ideXlab platform.
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DNA barcoding: an effective tool to overcome morphological identification constraints in the assessment of the ecological quality
CIbio- Inbio: Community Ecology for 21th Century (Genes to Ecosystems), 2016Co-Authors: Medeiros J.p., Weisberg S. B., Alves M.j., Stein E., Gillett D., Chainho P., Costa J.l., Adão H, Costa M:jAbstract:DNA barcoding has the potential to overcome taxonomic challenges in biological community assessments. However, fulfilling that potential requires successful amplification of a large and unbiased portion of the community. In this study, we attempted to identify mitochondrial gene cytochrome c oxidase I (COI) barcodes from 1024 benthic invertebrate specimens belonging to 54 taxa from low salinity environments of the Mira estuary and Torgal riverside (SW Portugal). Up to 17 primer pairs and several reaction conditions were attempted among specimens from all taxa, with amplification success defined as a single band of approximately 658 bp visualized on a pre-cast agarose gel, starting near the 5' end of the COI gene and suitable for sequencing. Amplification success was achieved for 99.6% of the 54 taxa, though no single primer was successful for more than 88.9% of the taxa. However, only 68.5% of the specimens within these taxa successfully amplified. Inhibition factors resulting from a non-purified DNA extracted and inexistence of Species-specific primers for COI were pointed as the main reasons for an unsuccessful amplification. These results suggest that DNA barcoding can be an effective tool for application in low salinity environments where taxa such as chironomids and oligochaetes are challenging for morphological identification. Nevertheless, its implementation is not simple, as methods are still being standardized and Multiple Specie
