IMAGE PROCESSING TECHNIQUES
b) scintillator-photomultiplier combination which is used for recording secondary electrons. The secondary electrons are detected by a scintillator-photomultiplier combination which is known as the Everhart-Thornley detector. Its construction is shown in Fig. 1.1.2b which is taken form [1.1.2]. The secondary electrons are collected by a grid.
Download IMAGE PROCESSING TECHNIQUES
Information
Domain:
Source:
Link to this page:
Related documents
Time-of-Flight Mass Spectrometry - Agilent
www.agilent.comScintillator Figure 2. TOF detector with potentials shown for positive ion operation. The reason for this conversion of an electrical signal to an optical signal and back to an electrical signal is to electrically isolate the flight tube and the front of the detec-tor, which are at roughly –6,500 volts, from the PMT, whose signal output is at
Chapter 6: Basic radiation detectors
humanhealth.iaea.orgInorganic scintillator (light quantum) 25: Inorganic scintillator + PMT (electron) 100: Inorganic scintillator + Si diode (electron–hole pair) 35 ...
III. Scintillation Detectors
www-physics.lbl.govFor an ideal scintillator and low ionization density Luminescence ∝ Energy dissipated in scintillator or, in differential form The specific density of ionized and excited molecules along the particle track is Assume that a portion of the primary excitation is lost at high ionization density (ionization quenching) and introduce a quenching ...
X-ray detectors - Hamamatsu
www.hamamatsu.comScintillator detectors are widely used in these applications. These detectors use scintillators to convert X-rays into light and detect this light to detect X-rays indirectly. Especially in the medical field, the digital X-ray method, which uses X-ray detectors with large photosensitive area, is becoming mainstream, replacing the
Gamma Ray Spectroscopy - Department of Physics
www.phys.ufl.eduwith the scintillator; many do not interact at all and simply pass right through. More-over, there can be one or more interactions of a gamma and there may be multiple gam-mas emitted from a single nuclear decay. Usu-ally, all energy depositions in the scintillator from a single decay are effectively simultane-
Chapter 4 Scintillation Detectors
www.science.mcmaster.cascintillator in use. The average quantum efficiency over the emission spectrum of a typical scintillator is about 15 to 20 percent while the peak quantum efficiency is 25 ~ 30 %. The standard for quotation is the number of photoelectrons per keV energy loss …
The Decay of Muons - UCL
www.ucl.ac.ukThe scintillator and photomultiplier tube (PMT) were both installed inside a black anodized aluminium cylinder with measurements of ( ) diameter and ( ) height, as shown in Fig. (3). [9] Polyvinyltoluene served as the base material for the scintillator and was shaped as a cylinder of ( …