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1. WO2012067954 - MULTIPLIER TUBE NEUTRON DETECTOR

Publication Number WO/2012/067954
Publication Date 24.05.2012
International Application No. PCT/US2011/060303
International Filing Date 11.11.2011
IPC
G01T 3/00 2006.01
GPHYSICS
01MEASURING; TESTING
TMEASUREMENT OF NUCLEAR OR X-RADIATION
3Measuring neutron radiation
G01V 5/04 2006.01
GPHYSICS
01MEASURING; TESTING
VGEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
5Prospecting or detecting by the use of nuclear radiation, e.g. of natural or induced radioactivity
04specially adapted for well-logging
CPC
G01T 1/28
GPHYSICS
01MEASURING; TESTING
TMEASUREMENT OF NUCLEAR OR X-RADIATION
1Measuring X-radiation, gamma radiation, corpuscular radiation, or cosmic radiation
16Measuring radiation intensity
28with secondary-emission detectors
G01T 3/00
GPHYSICS
01MEASURING; TESTING
TMEASUREMENT OF NUCLEAR OR X-RADIATION
3Measuring neutron radiation
G01V 5/04
GPHYSICS
01MEASURING; TESTING
VGEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS
5Prospecting or detecting by the use of nuclear radiation, e.g. of natural or induced radioactivity
04specially adapted for well-logging
G01V 5/107
GPHYSICS
01MEASURING; TESTING
VGEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS
5Prospecting or detecting by the use of nuclear radiation, e.g. of natural or induced radioactivity
04specially adapted for well-logging
08using primary nuclear radiation sources or X-rays
10using neutron sources
107and detecting reflected or back-scattered neutrons
H01J 47/1205
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
JELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
47Tubes for determining the presence, intensity, density or energy of radiation or particles
12Neutron detector tubes, e.g. BF3 tubes
1205using nuclear reactions of the type (n, alpha) in solid materials, e.g. Boron-10 (n,alpha) Lithium-7, Lithium-6 (n, alpha)Hydrogen-3
Applicants
  • SCHLUMBERGER CANADA LIMITED [CA]/[CA] (CA)
  • SERVICES PETROLIERS SCHLUMBERGER [FR]/[FR] (FR)
  • SCHLUMBERGER HOLDINGS LIMITED [GB]/[GB] (JP, NL)
  • SCHLUMBERGER TECHNOLOGY B.V. [NL]/[NL] (AL, AM, AU, AZ, BF, BG, BJ, BY, CF, CG, CI, CM, CO, CZ, DE, DK, GA, GN, GQ, GR, GW, HU, ID, IE, IL, IT, KG, KP, KR, KZ, LT, MD, ML, MR, MX, MY, NE, NO, NZ, OM, PL, RO, RU, SI, SK, SN, TD, TG, TH, TJ, TM, TN, TR, TT, UZ, ZA)
  • PRAD RESEARCH AND DEVELOPMENT LIMITED [GB]/[GB] (AE, AG, AL, AO, AT, BA, BB, BE, BH, BR, BW, BZ, CH, CL, CN, CR, CU, CY, DM, DO, DZ, EC, EE, EG, ES, FI, GD, GE, GH, GM, GT, HN, HR, IN, IS, KE, KM, KN, LA, LC, LK, LR, LS, LU, LV, LY, MA, MC, ME, MG, MK, MN, MT, MW, MZ, NA, NG, NI, PE, PG, PH, PT, RS, SC, SD, SE, SG, SL, SM, ST, SV, SY, SZ, TZ, UA, UG, VC, VN, ZM, ZW)
  • STEPHENSON, Ken [US]/[US] (UsOnly)
  • STOLLER, Christian [US]/[US] (UsOnly)
  • PHILIP, Olivier G. [FR]/[US] (UsOnly)
Inventors
  • STEPHENSON, Ken
  • STOLLER, Christian
  • PHILIP, Olivier G.
Agents
  • FONSECA, Darla
Priority Data
61/413,81315.11.2010US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) MULTIPLIER TUBE NEUTRON DETECTOR
(FR) DÉTECTEUR DE NEUTRONS À TUBE MULTIPLICATEUR
Abstract
(EN)
A neutron detecting device using a neutron-reactive material as the source of charged particles to feed conventional dynode-based electron multiplier which not gas-filled (i.e., with 3He). The detector comprises a neutron-reacting material that produces charged particles, coupled with an electron multiplier that is known for use in photomultipliers. The neutron-reacting material is deposited on a substrate at the entrance to the electron multiplier. Charged particles from the neutron-reacting material impinge on the first dynode of the electron multiplier, where, in turn, electrons are generated. The secondary electrons are collected by a second dynode, and the charge so collected is amplified in each succeeding dynode stage in a cascade effect. The charge pulse from the anode is processed by subsequent pulse processing electronics and counting electronics to provide a count rate that is proportional to the neutron flux incident on the neutron-reacting material.
(FR)
La présente invention concerne un dispositif de détection de neutrons, qui utilise un matériau réactif aux neutrons en tant que source de particules chargées pour alimenter un multiplicateur d'électrons classique à base de dynode qui n'est pas rempli de gaz (c'est-à-dire de 3He). Le détecteur comprend un matériau réactif aux neutrons qui produit des particules chargées, accouplé à un multiplicateur d'électrons qui est connu pour être utilisé dans des photomultiplicateurs. Le matériau réactif aux neutrons est déposé sur un substrat à l'entrée du multiplicateur d'électrons. Des particules chargées provenant du matériau réactif aux neutrons agissent sur la première dynode du multiplicateur d'électrons, où des électrons sont alors produits. Les électrons secondaires sont recueillis par une seconde dynode, et la charge ainsi recueillie est amplifiée à chaque étage successif de la dynode dans un effet cascade. L'impulsion de charge provenant de l'anode est traitée par des systèmes électroniques de traitement et de comptage à impulsions subséquents, pour fournir un taux de comptage qui est proportionnel au flux de neutrons incident sur le matériau réactif aux neutrons.
Also published as
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