| Paper | Title | Other Keywords | Page |
|---|---|---|---|
| TUPPT005 | Temperature Stability of the TRIUMF Cyclotron RF Controls | controls, feedback, cyclotron, TRIUMF | 162 |
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| Factors which contribute to ambient temperature sensitivity in the TRIUMF cyclotron RF control system are examined and characterized. Seasonal temperature variations together with air conditioning system limitations can give rise to unwanted temperature variations in the rack space housing the control system. If these are large enough, they can cause excursions in the cyclotron accelerating voltage. The critical components responsible are characterized and some possible remedies outlined. | |||
| TUPPT024 | Design of a Digital Low-Level RF System for BEST Medical Cyclotrons | controls, cyclotron, LLRF, cavity | 203 |
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| A versatile digital low-level RF system has been designed for the range of cyclotrons being developed by Best Cyclotron Systems Inc. (BCSI). Primary design considerations are given to robustness, low cost and the flexibility to be used on all BCSI resonator designs. As such, the system allows for operating frequency selection from 49 to 80 MHz and is compatible with single or double resonator configurations through the use of local oscillator synchronization and high-speed command exchange. An IQ demodulation/modulation scheme is employed allowing for frequency and amplitude control. High-speed phase control of separated resonators allows for beam intensity modulation techniques to be applied. This paper discusses the overall system design as well as integration results on both a single and double resonator cyclotron. | |||
| WEPSH003 | Development of New Combined System for Production of FDG and NaF Radiopharmaceuticals | controls, LabView, vacuum, ion | 390 |
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| In this work, we present a new combined system which produces FDG and NaF in separate runs. The needed for synthesis this radiopharmaceuticals are obtained by bombardment of highly enriched water with proton. The aim is development of routine systems to use with baby cyclotrons. In this study, the various chemical steps and required reagents as well as different reagent delivery methods has been investigated. This evaluation has been done with purpose of optimizing the performance of a conceptually simple device integrated into a fully automated synthesis procedure for radiosynthesis of FDG and NaF. In this system, we have used AVR microcontroller to control the process and LabVIEW software for monitoring the operation of system. Furthermore, Geiger Muller counters have been used to determine the activity to insure the accuracy of the systems operation. | |||
| TH1PB03 | Activation Analysis with Charged Particles: Theory, Practice and Potential | proton, target, neutron, cyclotron | 440 |
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Charged particle activation analysis (CPA) is an important application of cyclotrons. It is sensitive and can also activate lighter and other elements, such as Al, Si, Ti, Cd, Tl, Pb, Bi, etc., which cannot be conveniently or at all determined by slow neutron activation (NA). But, the heating of the target in CPA has to be overcome. Besides, it is necessary that the matrices of the sample and the “Standard” are identical or at least similar,which is not always convenient. However, with Chaudhri’s method*, CPA is reduced to the simplicity of NA even when matrices of “Standard” and sample are widely different. By using CPA, the effect of French Atomic Tests Series of 1974 in the Pacific on the Australian East Coast was studied. The sensitivity for detecting any element/isotope with Z=20 to Z=90 in any matrix, activated with protons, deuterons and alphas of up to 35 MeV energy have been estimated and presented in graphical form. From these curves the sensitivity of detecting any element/isotope in the aforementioned range can be directly estimated in any given matrix. These curves would help in selecting the most suitable nuclear reaction for the measurement of a particular element.
*A.Chaudhri, N.Chaudhri. Methods of charged-particle activation analysis. Paper presented at the 20th Int. Conf. On Ion Beam Analysis, Itapema (Brazil) 10-15 April, 2011 to be published |
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