摘要:

Recent progress and the present status of the multi‐stage Indiana University Cyclotron Facility are described. Some of the problems which have been encountered and their consequences and solutions will be discussed.Emphasis has been placed on work which has proceeded since the 1969 International Cyclotron Conference in Oxford.

ISSN:0094-243X    

DOI:10.1063/1.2946361

出版商:AIP    

年代:1972

数据来源: AIP

摘要:

This paper reviews future trends in cyclotron design, first briefly from the point‐of‐view of cyclotrons now in construction and second from the point‐of‐view of design features. The topics covered include the choice of a conventional or separated‐sector magnet, the use of dees or cavities for acceleration, possible flat‐topping of the rf wave, the impact of new technologies on design and operation, and extensions of the cyclotron concept to higher energies.

ISSN:0094-243X    

DOI:10.1063/1.2946358

出版商:AIP    

年代:1972

数据来源: AIP

摘要:

The status and future possibilities for several alternates to the cyclotron for heavy‐ion acceleration are discussed. Linear accelerators, both conventional and superconducting, tandem electrostatic accelerators, and the electron ring accelerator are among the accelerator types and concepts reviewed and compared.

ISSN:0094-243X    

DOI:10.1063/1.2946378

出版商:AIP    

年代:1972

数据来源: AIP

摘要:

The proposed National Heavy‐ion Laboratory will be provided with a multi‐stage accelerator system integrated with the existing Oak Ridge Isochronous Cyclotron (ORIC) facilities. The main accelerator stage is to be a four‐sector isochronous cyclotron that will provide beam energies up to 100 MeV/u. Ions may be injected into the large cyclotron from either a 20 MV tandem electrostatic accelerator or from the ORIC. The ion energies range from 100 MeV/u for oxygen to 10 MeV/u for uranium. Maximum beam intensities range from ∼ 1013particles/second for oxygen to2 × 1012 particles/secondfor uranium. The sector magnet angle for the cyclotron is 52° which yields radial and axial focusing frequencies of&ngr;r = 1.1 – 1.2and&ngr;z = 0.6 – 0.8. The field‐radius product of the magnet is 3018 kG‐cm at a maximum magnetic field of 16 kG. The rf system is tunable over the range 6 – 14 MHz to accommodate acceleration on harmonics 2 – 11. Second harmonic resonators are provided to increase the phase acceptance and/or the energy resolution.

ISSN:0094-243X    

DOI:10.1063/1.2946407

出版商:AIP    

年代:1972

数据来源: AIP

摘要:

The proposed accelerator system consists of a HVEC model CN Van de Graaff as injector and a split‐pole‐cyclotron. This combination is able to accelerate ions of massA ≤ 12up to an energy of 200 MeV. Beam currents of 1012particles/sec at an energy resolution of&Dgr;E/E = 10−3are anticipated.The Van de Graaff accelerates doubly charged ions toEi ≤ 12 MeV. The ions are stripped and further accelerated in the cyclotron to16.8·Ei. The cyclotron consists of 4 separated 50° magnets and two 36° Dees. The energy capability of the magnet isA · E/q2 = 100 MeV.

ISSN:0094-243X    

DOI:10.1063/1.2946415

出版商:AIP    

年代:1972

数据来源: AIP

摘要:

Some of the measured properties of magnetic fields for the injector stage and final stage cyclotrons under construction at Indiana University are described. The simply geometry and the operation at moderate field strength lead one to expect a predictable magnetic field. A discussion of observed departures from the predicted properties is presented. Data include selected radial and azimuthal profiles as a function of main field excitation; reproducibility from sector to sector and with hysteresis; properties and requirements of current sheet trim coils; and miscellaneous topics.

ISSN:0094-243X    

DOI:10.1063/1.2946423

出版商:AIP    

年代:1972

数据来源: AIP

摘要:

A preliminary study has been carried out for a variable energy, 200 MeV cyclotron which is designed for both nuclear physics and medical research. The operational and structural features of this machine are modeled closely on our present 50 MeV cyclotron. The magnet would have the same gap, but twice the diameter (3m) and twice the number of trim coils (17), and it would have four (instead of three) sectors with sufficient additional spiral. The rf system would operate in the 10–20 MHz range, with two 90° dees carrying up to 70 kV. This cyclotron would produce protons at energies up to 200 MeV, and other ions to corresponding energies. By extending our present phase selection and single turn extraction techniques to this cyclotron, the energy resolution of the extracted beam would be:E/(&Dgr;E)=7000. With proton currents of about 2 &mgr;A, the beam emittances would be 0.3 mm‐mrad radially and 2.5 mm‐mrad axially. The estimated cost of the cyclotron itself would be around two million dollars.

ISSN:0094-243X    

DOI:10.1063/1.2946424

出版商:AIP    

年代:1972

数据来源: AIP

摘要:

In Nuclear Research Institute of Ukrainian Academy of Sciences in Kiev the construction of 240‐cm isochronous cyclotron is being accomplished. The accelerator design is developed by D.V.Efremov Scientific Research Institute of Electrophysical Apparatus in Leningrad. The cyclotron is being in the state of assembly and adjustment. The cyclotron provides for variable‐energy protons up to 80 MeV of high beam quality as well as neutron pulses with duration less than two nanosec at pulse rate from 1 kHz to 100 kHz. At joint operation with the designed tandem generator xenon ions can be accelerated up to the energy being higher the Coulomb barrier. In the present paper main data concerning the cyclotron and its main mode operation are described.

ISSN:0094-243X    

DOI:10.1063/1.2946425

出版商:AIP    

年代:1972

数据来源: AIP

摘要:

The central region cyclotron has been built to investigate beam behaviour through the axial injection system and the first five turns of acceleration. A brief description of the resonator structure and the design of the electrostatic inflector is given. Preliminary results of beam tests are discussed.

ISSN:0094-243X    

DOI:10.1063/1.2946426

出版商:AIP    

年代:1972

数据来源: AIP

摘要:

The description of compact variable‐energy isochronous cyclotron is given. At present the manufacturing of main units of the prototype of the accelerator has been accomplished in D.V.Efremov Scientific Research Institute of Electrophysical Apparatus (SRIEA).The cyclotron is intended for acceleration of protons, ions of deuterium, helium‐3 and helium‐4 and can be used for production of radioactive isotopes, activation analysis and for investigation in the field of medicine, biology and nuclear physics.

ISSN:0094-243X    

DOI:10.1063/1.2946351

出版商:AIP    

年代:1972

数据来源: AIP