Charged particle activation facility in NPI CAS and in future GANIL/SPIRAL2-NFS

The proton, deuteron and alpha induced reactions are of a great interest for the assessment of induced radioactivity of accelerator components, targets and beam stoppers as well as isotope production for medicine and also to nuclear astrophysics. We present a new irradiation chamber for activation measurements, that forms a prolongation of long-term experimental activities using stacked-foil activation technique in NPI CAS, Řež. The chamber is based on an airlock system and is coupled to a pneumatic transfer system delivered by KIT Karlsruhe. This system is installed in GANIL/SPIRAL2-NFS and will be used for proton, deuteron and alpha particle activation measurements with long- and short-lived isotopes.

Research of Green Vegetable Cultivation Technology Under Photoculture Conditions in Irradiation Chamber

The object of the research in the chapter is green vegetable crops grown in a manmade environment. The purpose of the presented research is to study the process of growing plants in a man-made environment, the main influencing factor of which is the man-made sources (LEDs) emission, as well as to design and construct the installation (irradiation chamber) for implementation of the studied technology. The chapter presents the results of experiments conducted by a team of researchers, which allowed to determine the technological process indicators of growing green vegetable crops in a man-made environment, and also to develop designs for small-sized irradiation chambers with automatic control, both for laboratory research and for small business and private use. Studies were conducted in different regions of the country and combined the efforts of several scientific groups of researchers. The chapter presents the results of researching these areas conducted by the authors, which are completely original.

Исследование состава остаточного газа в вакуумной системе циклотрона ФТИ им. А.Ф. Иоффе

4. Using the FT-200 compact-size time-of-flight mass spectrometer developed at the Ioffe Institute, the mass spectra of the residual gas molecules in the vacuum system of the Ioffe Institute cyclotron have been obtained under various experimental conditions. The measurements were carried out in the cyclotron vacuum chamber and the end part of the ion guide near the sample irradiation chamber. It was found that the main contribution to the residual gas composition in the cyclotron chamber is made by the molecules of pump oil used (up to 82%) and water molecules (up to 15-17%), and in the ion guide near the irradiation chamber with a polymer film - water molecules (up to 63%). The data obtained are the basis for the modernization of the Ioffe cyclotron complex.

Design, Construction, and Modeling of a252Cf Neutron Irradiator

Neutron production methods are an integral part of research and analysis for an array of applications. This paper examines methods of neutron production, and the advantages of constructing a radioisotopic neutron irradiator assembly using252Cf. Characteristic neutron behavior and cost-benefit comparative analysis between alternative modes of neutron production are also examined. The irradiator is described from initial conception to the finished design. MCNP modeling shows a total neutron flux of 3 × 105 n/(cm2·s) in the irradiation chamber for a 25 μg source. Measurements of the gamma-ray and neutron dose rates near the external surface of the irradiator assembly are 120 μGy/h and 30 μSv/h, respectively, during irradiation. At completion of the project, total material, and labor costs remained below $50,000.