Energy Modulation of an Electron Beam by a Hyperfrequency Cavity for the Measurement of the Lifetimes of Excited Levels in the Picosecond Region (thesis); MODULATION EN ENERGIE D'UN FAISCEAU D'ELECTRONS PAR UNE CAVITE HYPERFREQUENCE, EN VUE DE LA MESURE DES DUREES DE VIE DE NIVEAUX EXCITES DANS LE DOMAINE DE LA PICOSECONDE (these)
A preliminary study on the development of a device for the measurement of the lifetimes in the picosecond region is reported. The method proposed consists essentially of adjusting the phase corresponding to the instant of formation of an excited level and that corresponding to its deexcitation by emission of electromagnetic radiation on a hyperfrequency wave. The energy modulation and the detection of the instant of zero phase by spectrometry were the areas studied in this preliminary investigation. Beta spectrometry was possible with high resolution with junction detectors. The hyperfrequency modulation cavity with high shunt resistance was fabricated. The theoretical and experimental studies have shown that the determination of time intervals with a precision of 9.5 x 10/sup -11/ sec is possible. It thus appears possible to study levels with a lifetime of the order of 10/sup -10/ sec. (J.S.R.)
- Research Organization:
- Lyon. Universite
- NSA Number:
- NSA-18-014162
- OSTI ID:
- 4078429
- Report Number(s):
- NP-13607
- Resource Relation:
- Other Information: Orig. Receipt Date: 31-DEC-64
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
Similar Records
Measurement of the (p-*gamma/) Angular Correlation in the Reaction Ca*SUP 40/(d,p)Ca*SUP 41*/ (1.95 Mev) with the Object of Examining the Validity of the Distorted Wave Theory. Study with a Magnetic Analyzer and Application to Nuclear Reactions (thesis); MESURE DE LA CORRELATION ANGULAIRE (p-*gamma/) DE LA REACTION Ca*SUP 40/(d,p)Ca*SUP 41*/ (1,95 Mev) EN VUE DE L'EXAMEN DE LA VALIDITE DE LA THEORIE DES ONDES DEFORMEES. ETUDE D'UN ANALYSEUR MAGNETIQUE ET APPLICATION AUX REACTIONS NUCLEAIRES (THESES)
ETUDE DE LA FOCALISATION D'UN FAISCEAU D'ELECTRONS ULTRA-RELATIVISTES DANS UN ACCELERATEUR LINEAIRE. APPLICATION A L'ACCELERATEUR LINEAIRE D'ORSAY. (Study of Focusing a Beam of Ultrarelativistic Electrons in a Linear Accelerator. Application to the Orsay Linear Accelerator).
Related Subjects
BETA SPECTROMETERS
CAVITY RESONATORS
CIRCUITS
DENSITY
DETECTION
DISTRIBUTION
ELECTRIC CHARGES
ELECTRIC CONDUCTIVITY
ELECTROMAGNETIC WAVES
ELECTRON BEAMS
ELECTRONIC EQUIPMENT
ELECTRONS
EMISSION
ENERGY
EXCITATION
FLUID FLOW
FREQUENCY
IONOSPHERE
IONS
MAGNETOHYDRODYNAMICS
MATHEMATICS
MAXWELL DISTRIBUTION
MEASURED VALUES
MICROWAVES
MODULATION
MOTION
OSCILLATIONS
PLASMA
RESOLUTION
RESONANCE
SATELLITES
SEMICONDUCTORS
SPECTROMETERS
TEMPERATURE
VELOCITY