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Gaseous Radiation Detectors: Fundamentals and Applications by Fabio Sauli

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By Fabio Sauli

Generic in high-energy and particle physics, gaseous radiation detectors are present process non-stop improvement. the 1st a part of this publication presents an excellent heritage for figuring out the fundamental techniques resulting in the detection and monitoring of charged debris, photons, and neutrons. carrying on with then with the advance of the multi-wire proportional chamber, the e-book describes the layout and operation of successive generations of gas-based radiation detectors, in addition to their use in experimental physics and different fields. Examples are supplied of purposes for advanced occasions monitoring, particle identity, and impartial radiation imaging. obstacles of the units are mentioned intimately. together with an in depth selection of information and references, this publication is perfect for researchers and experimentalists in nuclear and particle physics.

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22 (Sharma and Sauli, 1992). 4 Outline of the book 23 Within a few ns from the start of the multiplication process, all electrons in the avalanche have reached the anode; their collection contributes to the formation of the detected signal. The time taken by ions to reach the cathode, where they are neutralized, is tens to hundreds of µs, depending on the detector geometry and field strength. In their motion, particularly during the initial fast drift in the high field close to the anodes, ions induce charge signals in all electrodes; the (negative) charge induced by ions on the anode constitutes in fact the largest fraction of the detected signal.

By kind permission of IOP Publishing. HEED, available on-line, allows one to compute the energy loss processes in a wide range of conditions (Smirnov, 2012). 13, providing the energy loss for pions and electrons, in the region of the relativistic rise, as a function of the particle velocity and for several model calculations. , 1991). Attempts have been devised to exploit the primary ionization information, a method named cluster counting, that would allow one to improve considerably the particle identification resolution (Walenta, 1981).

The rate capability of MWPCs is also limited to a few kHz/mm2 by the build-up of a positive ion space charge, dynamically modifying the electric fields. In 1988 at the Institute Laue-Langevin (ILL) in Grenoble, Anton Oed developed a new detector concept named micro-strip gas counter (MSGC), which promised to improve both the multi-track resolution and the rate capability by at least one order of magnitude (Oed, 1988). The MSGC structure consists of thin parallel metallic strips engraved on a glass substrate and alternately connected as anodes and cathodes.

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