Results 1 - 10 of 1069
Results 1 - 10 of 1069. Search took: 0.045 seconds
|Sort by: date | relevance|
[en] A review of the archive’s documents on the main stages of the creation of the synchrocyclotron at the Hydrotechnical Laboratory (now known as the Dzhelepov Laboratory of Nuclear Problems) is presented. The review is based on minutes of the Special Committee and Scientific and Technical Council (NTS), which belongs to the First Chief Directorate (PGU) concerning the era of the Soviet atomic project (1945–1953). The analysis of these minutes has enabled us to prepare a chronicle of events that deal with the creation of the synchrocyclotron, as well as the discussion of the project and its place of construction, the research and development program, and so on. The minutes of two NTS meetings dated May 5 and 12, 1952 are devoted to discussing the results the research and development program in 1950–1951. The minutes of NTS meetings have not been published previously.
[en] In accelerators of the cyclotron types (cyclotron or synchrocylotron) the beam of charged particles emitted by a particle source located in the centre of such machines is subjected to the horizontal and vertical components of the high frequency electric field generated betwen the accelerator electrodes or 'Dees' of the accelerator, the vertical component of the H.F. electric field having a successively focusing and defocusing effect on the beam, depending on the phase in which the H.F. electric field is when the particles enter it. The hyper-frequency focusing system described in the invention makes it possible to modify in a proper manner the focusing and defocusing effect, in the vertical plane, of the H.F. electric field on the beam of particles adjacent to the particle source
[fr]Dans les accelerateurs du type cyclotron (cyclotrons ou synchrocyclotrons) le faisceau de particules chargees emis par une source de particules disposee au centre de ces appareils est soumis aux composantes horizontales et verticales du champ electrique haute-frequence cree entre les electrodes acceleratrices ou 'Dees' de l'accelerateur, la composante verticale du champ electrique H.F. ayant successivement un effet focalisant et defocalisant sur le faisceau suivant la phase dans laquelle se trouve le champ electrique H.F. lorsque les particules penetrent dans celui-ci. Le dispositif de focalisation hyperfrequence, objet de l'invention, permet de modifier de facon convenable l'effet de focalisation et defocalisation, dans le plan vertical, du champ electrique H.F. sur le faisceau de particules, au voisinage de la source de particules
[en] At the request of the House Committee on Science and Technology, GAO is reporting on the modernization and management of the Nevis Synchrocyclotron, a machine which accelerates charged particles and whose beams are created for experimental uses. The Foundation has informed Columbia that the synchrocyclotron's performance did not justify further support; Columbia has proposed to continue its research at other facilities. GAO recommends that the Director of the National Science Foundation terminate funding for the synchrocyclotron project