| 1. |
- Aamodt, K., et al.
(författare)
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The ALICE experiment at the CERN LHC
- 2008
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Ingår i: Journal of Instrumentation. - 1748-0221. ; 3:S08002
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Forskningsöversikt (refereegranskat)abstract
- ALICE (A Large Ion Collider Experiment) is a general-purpose, heavy-ion detector at the CERN LHC which focuses on QCD, the strong-interaction sector of the Standard Model. It is designed to address the physics of strongly interacting matter and the quark-gluon plasma at extreme values of energy density and temperature in nucleus-nucleus collisions. Besides running with Pb ions, the physics programme includes collisions with lighter ions, lower energy running and dedicated proton-nucleus runs. ALICE will also take data with proton beams at the top LHC energy to collect reference data for the heavy-ion programme and to address several QCD topics for which ALICE is complementary to the other LHC detectors. The ALICE detector has been built by a collaboration including currently over 1000 physicists and engineers from 105 Institutes in 30 countries, Its overall dimensions are 16 x 16 x 26 m(3) with a total weight of approximately 10 000 t. The experiment consists of 18 different detector systems each with its own specific technology choice and design constraints, driven both by the physics requirements and the experimental conditions expected at LHC. The most stringent design constraint is to cope with the extreme particle multiplicity anticipated in central Pb-Pb collisions. The different subsystems were optimized to provide high-momentum resolution as well as excellent Particle Identification (PID) over a broad range in momentum, up to the highest multiplicities predicted for LHC. This will allow for comprehensive studies of hadrons, electrons, muons, and photons produced in the collision of heavy nuclei. Most detector systems are scheduled to be installed and ready for data taking by mid-2008 when the LHC is scheduled to start operation, with the exception of parts of the Photon Spectrometer (PHOS), Transition Radiation Detector (TRD) and Electro Magnetic Calorimeter (EMCal). These detectors will be completed for the high-luminosity ion run expected in 2010. This paper describes in detail the detector components as installed for the first data taking in the summer of 2008.
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| 2. |
- Kanth, R. K., et al.
(författare)
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Analysis, design and development of novel, low profile microstrip antenna for satellite navigation
- 2009
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Ingår i: Proc. NORCHIP. ; , s. 1-4
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Konferensbidrag (refereegranskat)abstract
- International Telecommunication Union Radio Communication Sector ( ITU-R) has assigned 1.176 GHz and 2.487 GHz respectively in L and S band to Regional Navigational Satellite System (RNSS) for satellite navigation purpose. In this paper attempt has been made to design a novel, low profile compact microstrip antenna which achieves required specification such as gain of -4 dBi up to ±50° and bandwidth of 30 MHz. The design of L band antenna was carried out using Ansoft Designer Version 2 software and was fabricated and measured the required performance of antenna in terms of its return loss, VSWR and gain radiation pattern. The return loss of the developed antenna was measured with the vector network analyzer and its gain radiation pattern in anechoic chamber and the performance of its measurements were compared with the analyzed results.
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| 3. |
- Kanth, R. K., et al.
(författare)
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Design of multiband fractal antenna for mobile and handheld terminals
- 2009
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Ingår i: 1st South Central Asian Himalayas Regional IEEE/IFIP International Conference on Internet, AH-ICI 2009. - 9781424445707 ; , s. 1-4
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Konferensbidrag (refereegranskat)abstract
- The main objective of this paper is to give detailed analysis of a Dual Band fractal antenna operating simultaneously at L and S Band. A L/S band Sierpinski fractal stacked multilayer patch antenna has been designed, and analyzed for achieving -4 dBi gain at ±50 degree using Ansoft Designer Tool. To evaluate the performance of this dual band antenna in comparison to two separate antennas, efforts are also made to design two separate triangular patch antennas resonating at individual L and S band frequencies. The analyzed performance of the antenna indicates two distinct frequency bands, meeting the VSWR requirement and its gain radiation pattern. The designed topology of the dual band fractal antenna can be employed for satellite navigation.
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