Counter Cerenkov

Cerenkov radiation constitutes a very small fraction of the energy loss. It is important only because it has a particle application in the operation of Cerenkov counters (see Evans). Cerenkov radiation is visible electromagnetic radiation emitted by particles traveling in a medium, with speed greater than the speed of light in that medium. 

Introductory remarks. Many of the detectors employed by cosmic ray physicists and low energy nuclear physics have proved useful in high energy nuclear physics. In that there are an abundant number of texts on most of these techniques the sections below deal with the problems involved in employing only a few of the most useful of these detectors, namely scintillation counters, Cerenkov counters, photographic plates, bubble chambers and cloud chambers. 

The most promising types of Cerenkov detectors are those which are designed with an optical system that restricts the response of the detector to a narrow band of velocities. (See the section in Marshall s review on focusing Cerenkov counters".) If a Cerenkov detector with good velocity resolution is used in combination with a magnetic (momentum) analyzing system, it is possible to identify the mass of the particles being detected. An excellent example of the importance of velocity selective Cerenkov detectors is in the identification of... 

Fechtejr, and McIntyre). A Cerenkov counter is employed as a detector. The magnets are held constant to about 0.1%. 

RICH counter A ring imaging Cerenkov counter. When a high energy physics particles travels inside an aerogel, a radiation is emitted in a direction located on a cone which is observable as a ring... 

The silica aerogel thresliold Cerenkov counter using two cells with refractive indices of n 1.06 and n = 1.008 provides sufficient particle identification to achieve the physics goals of PEP-II. Figure 4.16 shows the probability [23] for detecting electrons, muons, pious, kaons and protons as a function of momentum. Solid curves correspond to the n = 1.06 cell, while dashed curves correspond to the n = 1.008 cell. False identifications... 

Figure 4.16. Detection probabilities for various particles in a two-cell silica aerogel threshold Cerenkov counter detector...

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