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CONSTANT FRACTION DISCRIMINATOR [1 record]
Record 1 - internal organization data 2011-11-24
Record 1, English
Record 1, Subject field(s)
- Scientific Instruments
- Radiological Physics (Theory and Application)
Record 1, Main entry term, English
- constant fraction discriminator
1, record 1, English, constant%20fraction%20discriminator
correct
Record 1, Abbreviations, English
- CFD 2, record 1, English, CFD
correct
Record 1, Synonyms, English
Record 1, Textual support, English
Record number: 1, Textual support number: 1 DEF
A discriminator [used] to minimize time walk errors encountered [thereby] triggering constant rise time and varying amplitude signals. 3, record 1, English, - constant%20fraction%20discriminator
Record number: 1, Textual support number: 1 OBS
In a CFD, the unipolar input signal is turned into a bipolar signal by an appropriate electronic chain. This is done by splitting the input signal with different ratio. One of the signals experiences a certain delay and gets inverted, while the other gets attenuated. Finally both signals are again added to form the CFD bipolar signal. 4, record 1, English, - constant%20fraction%20discriminator
Record 1, Key term(s)
- constant-fraction discriminator
Record 1, French
Record 1, Domaine(s)
- Instruments scientifiques
- Physique radiologique et applications
Record 1, Main entry term, French
- discriminateur à fraction constante
1, record 1, French, discriminateur%20%C3%A0%20fraction%20constante
correct, masculine noun
Record 1, Abbreviations, French
- DFC 2, record 1, French, DFC
correct, masculine noun
Record 1, Synonyms, French
Record 1, Textual support, French
Record number: 1, Textual support number: 1 CONT
Le discriminateur à fraction constante. Pour une fenêtre d’énergie réglée, soit sur 1,28 MeV [mégaélectronvolt], soit sur 511 keV [kiloélectronvolts], il génère une impulsion logique suivant le principe de discrimination à fraction constante pour dater la détection du gamma indépendamment de la forme de l’impulsion envoyée par le photomultiplicateur. Plus précisément, le signal de sortie du photomultiplicateur est divisé en deux parties; la première est retardée et inversée et la deuxième est atténuée d’une fraction constante. Les deux signaux sont ensuite additionnés pour former un signal bipolaire caractérisé par un passage à zéro temporellement indépendant de l’amplitude du signal initial. 3, record 1, French, - discriminateur%20%C3%A0%20fraction%20constante
Record 1, Spanish
Record 1, Textual support, Spanish
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