Published April 1962
| Version v1
Book
A fast coincidence with slow scintillators
Description
As is well known, a time measurement may be obtained by using the zero crossing of a bipolar pulse linearly derived from the multiplier phototube. The bipolar pulse, coming from a double-line amplifier is sent to the coincidence channel and the amplitude measurement is made by means of the first part of the pulse. In order to reduce statistical spreading at the time of the zero crossing, the pulse is so shaped that the zero crossing has the statistical properties of the collection time of a small fraction of total photo-electrons. The circuit is derived from one recently developed by R. Chase, and is used both for amplitude and time-measurement. The systematic error of time measurement is a few nanoseconds for an amplitude-variation of a factor ten of the input bipolar pulse; the statistical spreading for pulses derived from 500-keV rays is six nanoseconds. (author)
Abstract (French)
On sait qu'il est possible d'obtenir une mesure de temps au moyen du recouvrement au point zero d'une impulsion bipolaire obtenue lineairement a partir du photomultiplicateur. L'impulsion bipolaire, provenant d'un amplificateur a double voie, est transmise au circuit de coincidence; la mesure de l'amplitude est effectuee au moyen de la premiere partie de l'impulsion. Pour limiter l'etalement statistique du recouvrement au point nul dans le temps, l'impulsion est mise en forme de maniere que le recouvrement au point nul ait les proprietes statistiques du temps de collection d'une petite fraction du nombre total de photoelectrons. Le circuit, construit sur le meme principe que celui qui a ete recemment mis au point par R. Chase, sert a mesurer, a la fois, l'amplitude et le temps. L'erreur systematique dans la mesure du temps est de quelques nanosecondes pour une variation d'amplitude de l'impulsion bipolaire d'entree correspondant a un facteur 10; l'etalement statistique pour les impulsions obtenues a partir de rayonnements de 500 keV est de 6 ns. (author)Abstract (Spanish)
Como es bien sabido, pueden hacerse mediciones de tiempo utilizando la interseccion de un impulso bipolar, derivado linealmente del fotomueltiplicador, con el eje cero. El impulso bipolar, proveniente de un amplificador de doble linea, se transmite al canal de coincidencia y la medicion de la amplitud se efectua por medio de la primera parte del impulso. Para reducir la dispersion estadistica en el tiempo de la interseccion con el eje cero, el impulso se conforma de tal modo que la interseccion tiene las propriedades estadisticas del tiempo de coleccion de una pequena fraccion del total de fotoelectrones. El circuito es una variante de otro recientemente ideado por R. Chase, y se utiliza para mediciones de amplitud y de tiempo. El error sistematico de la medicion de tiempo es de varios nanosegundos para un factor de variacion de la amplitud del impulso de entrada bipolar del orden de 10; la dispersion estadistica de los impulsos producidos por rayos de 500 keV es de 6 ns. (author)Abstract (Russian)
Kak khorosho izvestno, vremya mozhet byt' izmereno posredstvom ispol'zovaniya nulevogo peresecheniya dvukhpolyusnykh impul'sov, linejno vyvedennykh iz fotoehlektronnogo umnozhitelya. Dvukhpolyusnyj impul's, postupayushchij iz usilitelya s dvojnoj liniej, napravlyaetsya v kanal sovpadenij i pri pomoshchi pervoj chasti impul'sa izmeryaetsya ego amplituda. Dlya umen'sheniya statisticheskogo razbrosa nulevykh peresechenij vo vremeni, impul'su pridaetsya takaya forma, chto nulevoe peresechenie obladaet statisticheskimi svojstvami vremeni sobiraniya maloj doli obshchego chisla fotoehlektronov. EHta skhema yavlyaetsya vidoizmeneniem skhemy, nedavno vyrabotannoj g-nom R. CHejzom, i ona ispol'zuetsya kak dlya izmereniya amplitudy, tak i dlya izmereniya vremeni. Sistematicheskaya pogreshnost' pri izmerenii vremeni sostavlyaet vsego lish' neskol'ko nanosekund dlya desyatikratnogo izmeneniya amplitudy vkhodyashchego dvukhpolyusnogo impul'sa, statisticheskoe rasseyanie impul'sov, poluchaemykh iz luchej v 500 kehv, sostavlyaet shest' nanosekund. (author)Additional details
Additional titles
- Original title (English)
- Circuit de coincidence rapide a scintillateurs lents; Skhema bystrykh sovpadenij v medlennykh stsintillyatorakh; Coincidencia rapida con centelleadores lentos
Publishing Information
- Publisher
- Brueder Rosenbaum
- Imprint Place
- Vienna (International Atomic Energy Agency (IAEA))
- Imprint Title
- Nuclear Electronics III. Proceedings of the Conference on Nuclear Electronics. V. III
- Imprint Pagination
- 544 p.
- Series
- Proceedings Series
- Journal Page Range
- p. 105-114
- ISSN
- 0074-1884
Conference
- Title
- Conference on Nuclear Electronics
- Dates
- 15-20 May 1961
- Place
- Belgrade, Yugoslavia (Serbia)
INIS
- Country of Publication
- International Atomic Energy Agency (IAEA)
- Country of Input or Organization
- International Atomic Energy Agency (IAEA)
- INIS RN
- 44041827
- Subject category
- S46: INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY;
- Resource subtype / Literary indicator
- Conference
- Descriptors DEI
- AMPLIFIERS; KEV RANGE 100-1000; PLASTIC SCINTILLATORS; PULSES; SIGNALS; TIME MEASUREMENT
- Descriptors DEC
- ELECTRONIC EQUIPMENT; ENERGY RANGE; EQUIPMENT; KEV RANGE; PHOSPHORS
Optional Information
- Notes
- 6 figs, 10 refs Imprint:In three volumes
- Secondary number(s)
- STI/PUB--42(Vol.3)