[PDF] Development Of Floating Strip Micromegas Detectors eBook

Author : Jonathan Bortfeldt
Publisher : Springer
Page : 267 pages
File Size : 43,18 MB
Release : 2015-06-05
Category : Science
ISBN : 3319188933

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This book discusses a novel and high-rate-capable micro pattern gaseous detector of the Micromegas (MICRO-MEsh GAS detector) type. It provides a detailed characterization of the performance of Micromegas detectors on the basis of measurements and simulations, along with an in-depth examination of analysis and reconstruction methods. The accurate and efficient detection of minimum ionizing particles in high-rate background environments is demonstrated. The excellent performance determined here for these lightweight detectors will make possible the live medical imaging of a patient during ion-beam treatment.

Author : Jonathan Bortfeldt
Publisher :
Page : pages
File Size : 43,60 MB
Release : 2015
Category :
ISBN : 9783319188942

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This book discusses a novel and high-rate-capable micro pattern gaseous detector of the Micromegas (MICRO-MEsh GAS detector) type. It provides a detailed characterization of the performance of Micromegas detectors on the basis of measurements and simulations, along with an in-depth examination of analysis and reconstruction methods. The accurate and efficient detection of minimum ionizing particles in high-rate background environments is demonstrated. The excellent performance determined here for these lightweight detectors will make possible the live medical imaging of a patient during ion-beam treatment.

Author : Thorwald Klapdor-Kleingrothaus
Publisher :
Page : pages
File Size : 46,49 MB
Release : 2018
Category :
ISBN :

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Abstract: Im Zuge der Upgrades des LHC und des ATLAS Detektors in den kommenden Jahren wird ein Teil des ATLAS Myonspektrometers, das Small Wheel, durch ein leistungsfähigeres ersetzt. Dieses New Small Wheel (NSW) wird mit zwei verschiedenen Gasdetektortypen bestückt: MicroMegas (MM) und small-strip Thin Gap Chambers. Es wird ein konstantes Antwortverhalten der MM im Betrieb des NSW gefordert, jedoch kann der Arbeitspunkt der MM durch die Gasdichte und -zusammensetzung sowie die angelegte Hochspannung beinflußt werden. Diese Dissertation untersucht das Antwortverhalten in Abhängigkeit von Feuchtigkeit im Prozessgas und dessen Druck experimentell mittels Messungen an zwei MM Prototypen und durch aufwendige Simulationen. Mit den Simulationen werden die Gaseigenschaften wie Driftgeschwindigkeit, Townsend-Koeffizient und die Signalentstehung im Detektor und deren Abhängigkeiten von Druck und Feuchtigkeit untersucht. Das Ergebnis soll eine Parametrisierung zur Kompensation der untersuchten Einflüsse mittels der Hochspannung sein, um so ein konstantes Antwortverhalten durch automatische Anpassung der Hochspannung im NSW zu ermöglichen. Diese Parametrisierung wird in dem, im zweiten Teil der Arbeit entwickelten, Detector Control System (DCS) verwendet und die automatische Anpassung der Hochspannung in Abhängigkeit der Änderung der Gasparameter realisiert. Dieses in dieser Arbeit speziell entwickelte DCS für die Hochspannung des NSW beinhaltet zusätzlich die Visualisierung des Status der Hochspannung der Detektorkammern, sowie eine komplexe Zuordnung der Hochspannungskanäle zu den Detektorlagen des NSW.

Author : Fabio Sauli
Publisher : World Scientific
Page : 364 pages
File Size : 13,60 MB
Release : 2020-11-25
Category : Science
ISBN : 9811222231

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As a continuation of the author's earlier work (Gaseous Radiation Detectors: Fundamental and Applications, Cambridge University Press 2014), this book describes in detail the recent developments and applications of advanced micro-pattern gaseous devices. Across different chapters, readers will learn of the most basic observations, measurements and applications of this novel technology within particle physics, astrophysics, medicine, cultural heritage studies and more. The content is based richly on a pool of information distilled from a large number of papers and reports on the subject, as well as presentations at topical Conferences and Symposia.The author, Fabio Sauli, is an expert with several hundreds of publications in the field. He is also the inventor of one of the major technologies described — the Gas Electron Multiplier — widely used in particle physics and other applied fields.

Author : Mounir Hamid
Publisher : LAP Lambert Academic Publishing
Page : 108 pages
File Size : 16,77 MB
Release : 2013
Category :
ISBN : 9783659396915

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Recent years have seen the development of many fields of gas detectors. The Multi-Wire Proportional Chamber (MWPC) and MICROMEGAS (Micro-Mesh Gas Structure) appeared successively as the very promising detectors. They are major families of position detectors in High Energy Physics, detect and localize energy deposit by charged particles over large area. In this work, MATLAB simulations of This Detectors are represented. The aim of this work is to simulate the potential and electric field distribution in (MWPC), to clarify the phenomenon of induction of signals in the electrodes. Initially, we focus on electronic and ionic currents induced, then; we will calculate the total charge induced. We choose Argon-isobutane(Ar-iC4H10) and Argon-dimethyl-ether (DME) gas mixture, using 55Fe radioactive 5.9keV X-rays Source. In the normal condition, (T=298k, p=1atm), we simulate the temporal structure of the current signal, and the contribution of the total charge induced. The pre-amplified signal is evaluated. These results are compared to other results published. We remark the dependence of the output signal of MICROMEGAS detector and improving the performance of this detector.