| Paper |
Title |
Page |
| TUPC106 |
Optimization of Electron Linac Operating Conditions for Photonuclear Isotope Production
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1308 |
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- V. L. Uvarov, A. N. Dovbnya, V. I. Nikiforov, Z. V. Zhiglo
NSC/KIPT, Kharkov
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The communication describes the method for optimizing the high-power Linac regime (electron energy, pulsed current and beam size, pulse repetition rate) and the composition of output devices to provide the maximum photonuclear yield of isotope product with the maintenance of thermal stability of structural elements. To exemplify, the results of accelerator KUT-30 (45 MeV, 10 kW) optimization at conditions of medical isotope Cu-67 production are reported. Simulation based on a modified PENELOPE/2006 code was employed to compute the Cu-67 generation rate in the Zn target, and also the absorbed radiation power in output device elements for different operating conditions of the accelerator with due regard for its loading characteristic. The simulation results were used to calculate the target and the converter (Ta) temperature at various thicknesses of the latter and at real cooling parameters. Conditions have been established for the maximum Cu-67 yield with keeping thermal stability of the target device.
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| TUPC107 |
Feed-free Monitoring of Intense High-energy Bremsstrahlung
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1311 |
| |
- V. L. Uvarov, V. I. Nikiforov, V. A. Shevchenko, I. N. Shlyakhov, A. Eh. Tenishev
NSC/KIPT, Kharkov
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High-intensity (>103 W/cm2) bremsstrahlung sources produced on the basis of electron linacs of energy E0 up to 100 MeV find use in accelerator-driven subcritical assemblies, in photonuclear isotope production, activation analysis, etc. These processes, as a rule, call for maintaining a stable bremsstrahlung flow for one or more days. Therefore the diagnostic means of the radiation must function reliably under conditions of high-absorbed doses (≥108 Gy). To solve the problem, it is proposed to use a direct charge detector (DCD). It consists of two vacuum gap-spaced metal plates of different thickness. The simulation method based on the software PENELOPE/2006 was used to investigate the conditions of equilibrium e, X-radiation formation in the area of detector location, the dependence of detector sensitivity in its standard geometry on the atomic number Z of the plate material and the gammas energy at E0 ranging from 20 to 100 MeV. The realization of the method has been demonstrated by experiment with the use of the DCD prototype. The proposed detector requires no external power supply, is easy to operate and has a high radiation resistance.
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