3,694 research outputs found
Design and Studies of Micro-Strip Stacked Module Prototypes for Tracking and Trigger at the SLHC
No full textPrototype silicon microstrip modules meant to generate Level 1 trigger information in future tracker implementations at super-high luminosity accelerators have been built using spare components from the current CMS Tracker and tested on a 120 GeV muon beam at the CERN SPS North Area. Tracking information from a silicon microstrip beam telescope has also been used in order to precisely reconstruct tracks and incidence angles. Data has been collected from prototypes with different geometries and interconnection schemes and at different angles of beam incidence, simulating the effect of a solenoidal magnetic field on particles of different transverse momentum p(perpendicular to)
Results with microstrip detectors produced by STMicroelectronics for the CMS tracker
No full textThe paper presents the results of an extensive set of measurements performed on silicon microstrip sensors produced by STMicroelectronics for the CMS Tracker, 5" and 6" technologies were used to process several series of detector prototypes. Detectors 300 m thick were produced on 5" wafers and fully characterized. A new design on 500 m thick wafers with 6" technology has been recently implemented. The performance of three different layouts has been investigated in terms of macroscopic electrical parameters and radiation resistance. (C) 2002 Elsevier Science B.V. All rights reserved
Test results on heavily irradiated silicon detectors
No full textThe performance of silicon micro-strip detectors after heavy irradiation have been investigated using a muon beam. Large-area sensors have been irradiated with neutrons and protons, read-out with fast shaping time electronics, and operated at low temperature. The paper presents a study of the charge collection efficiency, signal-to-noise ratio and hit reconstruction: efficiency of these silicon devices
Characterization and simulation of CMS-type silicon microstrip detectors
No full textThis paper describes the expected performance for the single-sided silicon detectors of the barrel tracker of CMS. We present results obtained on;P-side test structures for different detector design geometries (strip pitch and width) and two readout schemes (every strip or every second strip). We show measurements on devices irradiated by fast neutrons, operated at very high bias voltage well above the depletion. We use an analytical model to evaluate the charge collection efficiency, noise, and signal-to-noise ratio in realistic experimental conditions
Author, publisher and bookseller : a tripartite synergy in Nigerian book industry
No full textThis work is about the roles of Author, Publisher and Bookseller in Book development in
Nigeria. The paper started by delving into the history of Book Publishing in Nigeria after
which it proceeded by defining who an author, a publisher, and a bookseller is and
expatiated on the indispensable roles of these key actors in Nigerian Book Industry and in
the emerging Information Society. Furthermore, the various constraints to book
development were identified while the paper advised on how the Book Industry can be
further promoted in Nigeria. However, the paper concluded and made recommendations
on how the Book sector can help in enhancing scholarship in the country
Design and development of micro-strip stacked module prototypes to measure flying particle directions
No full textExperience at high luminosity hadron collider experiments shows that tracking information enhances the trigger rejection capabilities while retaining high efficiency for interesting physics events [1]. The design of a tracking based trigger for Super LHC (S-LHC), the already envisaged high luminosity upgrade of the LHC collider [2], is an extremely challenging task, and requires the identification of high-momentum particle tracks as a part of the Level 1 Trigger. Simulation studies show that this can be achieved by correlating hits on two closely spaced silicon strip sensors. This work focuses on the design and development of micro-strip stacked prototype modules and will also discuss the technical challenges in the construction and final detector performance. Studies of possible sensor spacing and wire-bonding techniques will be also presented. The prototypes have been built with the silicon sensors and electronics used to equip the present CMS Tracker [3, 4]. Correlation of signals collected from sensors are processed off detector. We will present the results of tests performed on the prototype modules in terms of the noise performance of the proposed stack geometry. Preliminary results in terms of signal over noise and tracking performance with cosmic rays will also be shown
Author's reply: Comments on delay-dependent robust H-infinity control for uncertain systems with a state-delay
No full textIn the above-mentioned comment, the authors point out a technical problem with the paper [Lee, Y. S., Moon, Y. S., Kwon, W. H., & Park, P. G. (2004). Delay-dependent robust H-infinity control for uncertain systems with a state-delay. Automatica, 40(1), 65-72]. We show this technical problem can be solved by changing the proof of Theorem 3.1. (C) 2007 Elsevier Ltd. All rights reserved.X115sciescopu
An Econometric model for the evolution of the Romanian Interbank Bid Rate (ROBID) in the context of the international financial crisis
No full textThe paper presents the econometric modeling of overnight inter-banking interest rates (ROBID) in our country, the analyzed period is between 1999-2010. The international financial crises had a great impact on the level of inter-banking interest rates after 2007 and it reflects the new level of risk for the Romanian system banking. The econometric model used in modeling the interest rates is an autoregressive moving average (ARMA) model, the ARMA model is typically applied to time series data; the paper propose several ARMA models, applies econometric tests and based on them the analyzed series (the inter-banking interest rates) forecast will be made.ROBID, ARIMA model, financial crisis, forecast.
High-voltage operation of silicon devices for LHC experiments
No full textHigh-voltage operation can be a solution to obtain full charge collection in strongly irradiated silicon detectors. The maximum bias voltage which can be applied is limited by the breakdown point of the junction. We show how multiguard structures can enhance the breakdown voltage in p(+)-n silicon devices designed for applications in the LHC environment. (C) 1998 Elsevier Science B.V. All rights reserved
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