排序方式: 共有43条查询结果,搜索用时 15 毫秒
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Anita Topkar S. Praveenkumar Bharti Aggarwal S. K. Kataria M. D. Ghodgaonkar 《Pramana》2007,69(6):1085-1088
A specific research and development program has been carried out by BARC in India to develop the technology for large area
silicon strip detectors for application in nuclear and high energy physics experiments. These strip detectors will be used
as pre-shower detector in the CMS experiment at LHC, CERN for π
0/λ rejection. The fabrication technology to produce silicon strip detectors with very good uniformity over a large area of ∼40
cm2, low leakage currents of the order of 10 nA/cm2 per strip and high breakdown voltage of >500 V has been developed by BARC. The production of detectors is already under way
to deliver 1000 detector modules for the CMS and 90% production is completed. In this paper, research and development work
carried out to develop the detector fabrication technology is briefly described. The performance of the silicon strip detectors
produced in India is presented. The present status of the detector technology is discussed.
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In recent years the use of monolithic polymers in separation science has greatly increased due to the advantages these materials present over particle-based stationary phases, such as their relative ease of preparation and good permeability. For these reasons, these materials present high potential as stationary phases for the separation and purification of large molecules such as proteins, peptides, nucleic acids and cells. An example of this is the wide range of commercial available polymer-based monolithic columns now present in the market. 相似文献
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炭化条件和铁系添加剂对炭分子筛性能影响的研究 总被引:2,自引:1,他引:2
炭分子筛(CarbonMolecularSieve,以下简称CMS)是具有特别发达的微孔结构的特种活性炭,在气体分离方面有广阔的应用前景[1]。目前作为变压吸附空气分离技术的首选吸附剂,在国内外被广泛用于中小规模的空气分离以制取富N2气体,制取CMS的原料多是椰子壳、果核、植物、石油沥青及各种煤等[2,3]。煤是一种具有较为发达的孔隙结构的物质,且价格低廉,来源广泛,是制取CMS的一种较为理想的原料。鸡西地区拥有丰富的煤炭资源,开发煤炭的深加工及高附加值产品具有十分重要的意义。本文以鸡西地区的烟煤为原料,制备空… 相似文献
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《Comptes Rendus Physique》2015,16(4):368-378
To present knowledge, all the physics at the Large Hadron Collider (LHC) can be described in the framework of the Standard Model (SM) of particle physics. Indeed the newly discovered Higgs boson with a mass close to 125 GeV seems to confirm the predictions of the SM. Thus, besides looking for direct manifestations of the physics beyond the SM, one of the primary missions of the LHC is to perform ever more stringent tests of the SM. This requires not only improved theoretical developments to produce testable predictions and provide experiments with reliable event generators, but also sophisticated analyses techniques to overcome the formidable experimental environment of the LHC and perform precision measurements. The present article proposes an overview of the present theoretical tools and of the experimental results in the field of strong and electroweak interactions. 相似文献
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《Comptes Rendus Physique》2015,16(4):379-393
The discovery of the Higgs boson at a mass around 125 GeV by the ATLAS and CMS experiments at the LHC collider in 2012 establishes a new landscape in high-energy physics. The analysis of the full data sample collected with pp collisions at centre-of-mass energies of 7 and 8 TeV has allowed for considerable progress since the discovery. A review of the latest results is presented. 相似文献
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Seema Sharma 《Pramana》2007,69(6):1069-1074
The performance of the CMS hadron calorimeter is studied using test beam facilities at CERN. Two wedges of brass-scintillator
calorimeter are exposed to negative and positive beams with momenta between 3 and 300 GeV/c. Light produced in the scintillators
are collected using wavelength shifting fibres and read out using hybrid photodiodes. Each of the wedges has 17 layers of
scintillators. In one of these wedges signal from all 17 layers are grouped together while in the other each layer is read
out separately. The response, energy resolution, longitudinal and lateral shower profiles are measured.
on behalf of the CMS Collaboration 相似文献