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The luminescent chamber and its use in high-energy physics experiments; La chambre a luminescence: son emploi dans les experiences de physique des hautes energies; Lyuminestsentnaya kamera i ee ispol'zovanie v ehksperimentakh, provodimykh v fizike vysokikh ehnergij; La camara luminiscente y su empleo en experimentos de fisica de elevada energia

Conference:

Abstract

A luminescent chamber has been employed for the first time in experiments in high-energy particle physics. At the Bevatron of the Lawrence Radiation Laboratory, particle tracks in activated sodium-iodide crystals were photographed using a cascade system of three-image intensifier tubes. In one experiment, elastic pion-proton scattering was studied using two arrays of scintillator, each 20 cm long, one to observe the scattered pion and the other the recoil proton from a liquid hydrogen target. Scintillation counters selected only nearly-coplanar events to be recorded; however the final criteria for elastic scattering were the kinematics of the recorded tracks. About 1000 elastic events were photographed at each of three incident pion moments up to 2.5 MeV/c. In a second experiment a single-scintillator array 10 x 10 x 20 cm{sup 3} was used to observe stopping recoil protons from inelastic pion scattering (single pion production) at three incident pion momenta. Again several thousand events were recorded. The range and angle of the recoil proton uniquely determined the momentum transfer and the centre-of-mass energy of the di-pion system which were the relevant kinematical parameters in this problem. In these experiments post-event triggering and five-microsecond time-resolution were achieved by gating the second image tube on  More>>
Authors:
Jones, L W; Perl, M L; [1]  Lawrence Radiation Laboratory, University of California, Berkeley, CA (United States)]
  1. Randall Laboratory of Physics, University of Michigan, Ann Arbor, MI (United States)
Publication Date:
Apr 15, 1962
Product Type:
Conference
Resource Relation:
Conference: Conference on Nuclear Electronics, Belgrade, Yugoslavia (Serbia), 15-20 May 1961; Other Information: 9 figs, 2 tabs, 8 refs; Related Information: In: Nuclear Electronics I. Proceedings of the Conference on Nuclear Electronics. Vol. I| 611 p.
Subject:
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; ACCURACY; BEVATRON; CENTER-OF-MASS SYSTEM; CRYSTALS; ELASTIC SCATTERING; HIGH ENERGY PHYSICS; HYDROGEN; IMAGE INTENSIFIERS; IMAGE TUBES; LUMINESCENT CHAMBERS; MEV RANGE; MOMENTUM TRANSFER; PARTICLE PRODUCTION; PARTICLE TRACKS; PHOTOGRAPHY; PION-PROTON INTERACTIONS; RECOILS; RELIABILITY; SCINTILLATION COUNTERS; SIGNALS; SODIUM IODIDES; SPARK CHAMBERS; TIME RESOLUTION
OSTI ID:
22028317
Research Organizations:
International Atomic Energy Agency, Vienna (Austria)
Country of Origin:
IAEA
Language:
English
Other Identifying Numbers:
Other: ISSN 0074-1884; TRN: XA12N1940116583
Submitting Site:
INIS
Size:
page(s) 165-181
Announcement Date:
Jan 24, 2013

Conference:

Citation Formats

Jones, L W, Perl, M L, and Lawrence Radiation Laboratory, University of California, Berkeley, CA (United States)]. The luminescent chamber and its use in high-energy physics experiments; La chambre a luminescence: son emploi dans les experiences de physique des hautes energies; Lyuminestsentnaya kamera i ee ispol'zovanie v ehksperimentakh, provodimykh v fizike vysokikh ehnergij; La camara luminiscente y su empleo en experimentos de fisica de elevada energia. IAEA: N. p., 1962. Web.
Jones, L W, Perl, M L, & Lawrence Radiation Laboratory, University of California, Berkeley, CA (United States)]. The luminescent chamber and its use in high-energy physics experiments; La chambre a luminescence: son emploi dans les experiences de physique des hautes energies; Lyuminestsentnaya kamera i ee ispol'zovanie v ehksperimentakh, provodimykh v fizike vysokikh ehnergij; La camara luminiscente y su empleo en experimentos de fisica de elevada energia. IAEA.
Jones, L W, Perl, M L, and Lawrence Radiation Laboratory, University of California, Berkeley, CA (United States)]. 1962. "The luminescent chamber and its use in high-energy physics experiments; La chambre a luminescence: son emploi dans les experiences de physique des hautes energies; Lyuminestsentnaya kamera i ee ispol'zovanie v ehksperimentakh, provodimykh v fizike vysokikh ehnergij; La camara luminiscente y su empleo en experimentos de fisica de elevada energia." IAEA.
@misc{etde_22028317,
title = {The luminescent chamber and its use in high-energy physics experiments; La chambre a luminescence: son emploi dans les experiences de physique des hautes energies; Lyuminestsentnaya kamera i ee ispol'zovanie v ehksperimentakh, provodimykh v fizike vysokikh ehnergij; La camara luminiscente y su empleo en experimentos de fisica de elevada energia}
author = {Jones, L W, Perl, M L, and Lawrence Radiation Laboratory, University of California, Berkeley, CA (United States)]}
abstractNote = {A luminescent chamber has been employed for the first time in experiments in high-energy particle physics. At the Bevatron of the Lawrence Radiation Laboratory, particle tracks in activated sodium-iodide crystals were photographed using a cascade system of three-image intensifier tubes. In one experiment, elastic pion-proton scattering was studied using two arrays of scintillator, each 20 cm long, one to observe the scattered pion and the other the recoil proton from a liquid hydrogen target. Scintillation counters selected only nearly-coplanar events to be recorded; however the final criteria for elastic scattering were the kinematics of the recorded tracks. About 1000 elastic events were photographed at each of three incident pion moments up to 2.5 MeV/c. In a second experiment a single-scintillator array 10 x 10 x 20 cm{sup 3} was used to observe stopping recoil protons from inelastic pion scattering (single pion production) at three incident pion momenta. Again several thousand events were recorded. The range and angle of the recoil proton uniquely determined the momentum transfer and the centre-of-mass energy of the di-pion system which were the relevant kinematical parameters in this problem. In these experiments post-event triggering and five-microsecond time-resolution were achieved by gating the second image tube on a signal from the scintillation-counter electronics. The design and successful execution of these experiments are discussed in this paper, with particular reference to the relevant details of the image tubes, the scintillation counters and the electronic systems. Experience has also been gained in the analysis of the track photographs, particularly regarding the accuracy obtainable and reliability of the physics thus obtained. In conclusion, the future evolution of the luminescent chamber is explored, considering the image intensifier tubes and scintillators under current development. The role of the luminescent chamber in future highenergy experiments is analysed in relation to the spark chamber and other detectors. (author) [French] Pour la premiere fois, une chambre a luminescence a ete utilisee dans des experiences sur la physique des particules de haute energie. Au bevatron du Lawrence Radiation Laboratory, des trajectoires de particules dans des cristaux d'iodure de sodium active ont ete photographiees a l'aide d'un systeme compose de trois tubes renforcateurs d'image disposes en cascade. Au cours d'une premiere experience, les auteurs ont etudie la diffusion elastique pion-proton au moyen de deux dispositifs de 20 cm de long vus chacun par un scintillateur et servant a observer l'un le pion diffuse, l'autre, le proton de recul d'une cible d'hydrogene liquide. Les compteurs a scintillations ne selectionnaient, aux fins d'enregistrement, que les evenements quasi coplanaires; cependant, les criteres de diffusion elastique etaient les donnees cinematiques des trajectoires enregistrees. Pres de 1000 evenements elastiques ont ete photographies pour chacune des trois valeurs de la quantite de mouvement des mesons incidents, jusqu'a 2,5 MeV/c. Au cours d'une seconde experience, on n'a utilise qu'un seul dispositif de 10 x 10 x 20 cm vu par un scintillateur, pour observer les protons de recul qui s'arretent lors de la diffusion inelastique des pions (production d'un pion unique) pour trois quantites de mouvements differents du pion incident. On a, ici encore, enregistre plusieurs milliers d'evenements. Le parcours et l'angle du proton de recul ont permis de determiner le transfert de la quantite de mouvement et l'energie dans le centre de masse du systeme pion-pion, qui constituaient dans ce cas les deux parametres cinematiques determinants. Dans ces experiences, on a pu realiser le declenchement conditionne par la production de l'evenement et obtenir un temps de resolution de 5 microsecondes, en faisant en sorte que le second tube a rayons cathodiques se declenche lorsqu'un signal est donne par la partie electronique du compteur a scintillations. Les auteurs exposent les travaux de preparation et d'execution qui ont ete necessaires pour mener ces experiences a bonne fin; ils donnent, en particulier, les details voulus sur les tubes a rayons cathodiques, les compteurs a scintillations et les systemes electroniques utilises. L'analyse de photographies de trajectoires leur a permis d'etudier, notamment, le degre de precision qui peut etre atteint et la valeur des resultats physiques qui peuvent etre obtenus. Enfin, ils explorent les possibilites de developpement qui s'offrent a la chambre a luminescence, compte tenu des tubes renforcateurs d'image et des scintillateurs actuellement a l'etude. Ils analysent le role que la chambre a luminescence est appelee a jouer a l'avenir dans les experiences du domaine des grandes energies en comparaison avec la chambre a etincelles et les autres detecteurs. (author) [Spanish] Por primera vez se ha empleado una camara luminescente en experimentos de fisica con particulas de elevada energia. En el Bevatron del Lawrence Radiation Laboratory se fotografiaron trazas de particulas en cristales de yoduro sodico activado por medio de un sistema en cascada de tres tubos intensificadores de imagen. En un experimento se estudio la dispersion elastica pion-proton utilizando dos conjuntos de centelladores, cada uno de 20 cm de longitud. Uno para observar el pion dispersado y, el otro, el proton de retroceso procedente de un blanco de hidrogeno liquido. Los contadores de centelleo seleccionaban unicamente los sucesos casi coplanares que habian de ser registrados; no obstante, respecto de la dispersion inelastica, el criterio definitivo era la cinematica de las trazas registradas. Se fotografiaron alrededor de 1000 sucesos elasticos correspondientes cada uno a tres cantidades de movimiento del pion incidente hasta 2,5 MeV/c. En un segundo experimento se utilizo unicamente un conjunto de centelleadores de 10 x 10 x 20 cm{sup 3} para observar el frenado de los protones de retroceso procedentes de la dispersion inelastica de piones (produccion de piones aislados) en tres cantidades de movimiento correspondientes a piones incidentes. En este caso se registraron tambien varios millares de sucesos. El alcance y el angulo del proton de retroceso determinaron exclusivamente la transferencia de cantidad de movimiento y la energia del centro de masa del sistema di-pion, que fueron los parametros cinematicos de interes en este problema. En estos experimentos se logro un disparo despues de cada suceso y un tiempo de resolucion de 5 {mu}s, desbloqueando el segundo tubo de imagenes al recibir una senal del circuito electronico del contador de centelleo. Los autores estudian la preparacion y la ejecucion con exito de estos experimentos, sobre todo las caracteristicas mas interesantes de los tubos de imagenes de los contadores de centelleo y de los sistemas electronicos. Se ha adquirido tambien experiencia en el analisis de fotografias de trazas, en particular respecto de la precision alcanzable y la exactitud de los datos fisicos obtenidos. Por ultimo examinan la evolucion futura de las camaras luminiscentes, en especial de los tubos intensificadores de imagenes y los centelleadores en desarrollo actualmente. Tambien analizan el papel que la camara luminiscente podra desempenar en los futuros experimentos con particulas de elevada energia, en comparacion con las camaras de chispa y otros detectores. (author) [Russian] Vpervye v ehksperimentakh v oblasti fiziki chastits vysokikh ehnergij byla ispol'zovana lyuminestsentnaya kamera. Na bevatrone radiatsionnoj laboratorii im. Lourensa s pomoshch'yu kaskadnoj sistemy trekh usilitelej yarkosti izobrazheniya byli sfotografirovany sledy chastits v aktivirovannykh jodisto-natrievykh kristallakh. Pri odnom ehksperimente uprugoe rasseyanie pi-mezonov na protonakh izuchalos' s pomoshch'yu dvukh blokov stsintillyatorov, kazhdyj iz kotorykh imel dlinu 20 sm, prichem odin ispol'zovalsya dlya nablyudeniya rasseyannogo pi-mezona, a drugoj - dlya nablyudeniya protona otdachi, poluchennogo v rezul'tate bombardirovaniya misheni, pokrytoj zhidkim vodorodom. Stsintillyatsionnye schetchiki otbirali dlya zapisi lish' pochti koplanarnye yavleniya, odnako okonchatel'nymi kriteriyami uprugogo rasseyaniya byli kinematicheskie dannye zapisyvaemykh sledov. V kazhdom iz trekh sluchajnykh pi-mezonnykh momentov moshchnost'yu do 2,5 MeV/c bylo sfotografirovano do 1000 sluchaev uprugogo rasseyaniya. Vo vtorom ehksperimente dlya nablyudeniya ostanovki protonov otdachi, voznikayushchikh v rezul'tate neuprugogo rasseyaniya pi-mezona (poluchenie odnogo pi-mezona) v trekh sluchajnykh momentakh dvizheniya pi-mezona, ispol'zovalsya odin blok stsintillyatorov razmerom 10 x 10 x 20 kubicheskikh santimetrov. I zdes' bylo zapisano neskol'ko tysyach yavlenij. Diapazon i ugol rasseyaniya protona otdachi pozvolili opredelit' moment peredachi i tsentr massy ehnergii sistemy di-pi-mezona, kotorye v dannom sluchae predstavlyali srotvetstvuyushchie kinematicheskie parametry. Pri provedenii ehtikh ehksperimentov za schet propuskaniya cherez vtoruyu trubku s perenosom izobrazheniya signala, iskhodyashchego iz ehlektronnogo stsintillyatsionnogo schetchika, byli dostignuty p u s k posle yavleniya i vremennaya razreshayushchaya sposobnost' v techenii pyati mikrosekund. V dannom doklade obsuzhdayutsya ideya i uspeshnoe vypolnenie ehtikh ehksperimentov, prichem osoboe vnimanie udelyaetsya sootvetstvuyushchim detalyam trubok s perenosom izobrazheniya, stsintillyatsionnym schetchikam i ehlektronnym sistemam. Nakoplen takzhe opyt po analizu fotografij sledov i, osobenno, opyt v otnoshenii vozmozhnoj tochnosti i nadezhnosti poluchaemykh takim obrazom fizicheskikh dannykh. V zaklyuchenie rassmatrivaetsya dal'nejshee razvitie lyuminestsentnoj kamery s uchetom tekushchej raboty, kotoraya provoditsya s usilitelyami yarkosti izobrazheniya i stsintillyatorami. Analiziruetsya rol' lyuminestsentnoj kamery v budushchikh ehksperimentakh s vysokimi ehnergiyami po sravneniyu s iskrovoj kameroj i drugimi detektorami. (author)}
place = {IAEA}
year = {1962}
month = {Apr}
}