A shield for a cyclotron housing, capable of being retro-fitted to preinstalled cyclotron housings, which have a base and door configured for relative movement between open and closed configurations is provided. The shield comprises plurality of shielding layers removably stacked on top of a pedestal that is mounted to the top of the housing via spacers defining space or air gap between the pedestal and housing. The shield is positioned above and extending between the gap between housing door and base, such that the shield is positioned within the trajectory of the cyclotron beam.

A shield for a cyclotron housing, capable of being retro-fitted to preinstalled cyclotron housings, which have a base and door configured for relative movement between open and closed configurations is provided. The shield comprises plurality of shielding layers removably stacked on top of a pedestal that is mounted to the top of the housing via spacers defining space or air gap between the pedestal and housing. The shield is positioned above and extending between the gap between housing door and base, such that the shield is positioned within the trajectory of the cyclotron beam.

A radiation shielding material is fabricated by providing a mixture of a polyester polymer and lead oxide. The material can be formed by the open mold cast technique. A nanocomposite material comprising at least 10% lead oxide is used to provide shielding for diagnostic or medium x-rays. A formulation comprising 40% of lead oxide nanofiller embedded in a polyester matrix performed best at attenuation of diagnostic and medium x-ray levels.

A radiation shielding material is fabricated by providing a mixture of a polyester polymer and lead oxide. The material can be formed by the open mold cast technique. A nanocomposite material comprising at least 10% lead oxide is used to provide shielding for diagnostic or medium x-rays. A formulation comprising 40% of lead oxide nanofiller embedded in a polyester matrix performed best at attenuation of diagnostic and medium x-ray levels.

Disclosed are a superconductor having improved critical current density when exposed to high-energy neutron radiation and high magnetic fields, such as found in a compact nuclear fusion reactor, and a method of making the same. The method includes, prior to deployment in the exposure environment, irradiating a polycrystalline (e.g. cuprate) superconductor with ionic matter or neutrons at a cryogenic temperature to create “weak” magnetic flux pinning sites, such as point defects or small defect clusters. Irradiation temperature is chosen, for example as a function of the superconducting material, so that irradiation creates the beneficial flux pinning sites while avoiding detrimental widening of the boundaries of the crystalline grains caused by diffusion of the displaced atoms. Such a superconductor in a coated-conductor tape is expected to be beneficial when used, for example, as a toroidal field coil in a fusion reactor when cooled well below its critical temperature.

A preparation method of flexible transparent radiation shielding film based on bismuth compounds and its application are provided, in which bismuth compound nanoparticles, polyvinyl alcohol and trace glycerol are mixed to produce a flexible transparent radiation shielding film. The invention disperses the nanoparticles in water to form a stable dispersion, which ensures the homogeneity of the sol obtained by mixing the nanoparticles with polyvinyl alcohol. This invention avoids the decrease in transparency of the composite film as induced by agglomeration of the nanoparticles, achieving a light transmission of over 70% in the visible wavelength band (400-800 nm). With the aid of trace-mount glycerol, the film features long-term stability and flexibility. Importantly, the lead-free film shows a high shielding ability from the medical X-ray band (10-100 keV), which is comparable to Cu foil of identical thickness.

A preparation method of flexible transparent radiation shielding film based on bismuth compounds and its application are provided, in which bismuth compound nanoparticles, polyvinyl alcohol and trace glycerol are mixed to produce a flexible transparent radiation shielding film. The invention disperses the nanoparticles in water to form a stable dispersion, which ensures the homogeneity of the sol obtained by mixing the nanoparticles with polyvinyl alcohol. This invention avoids the decrease in transparency of the composite film as induced by agglomeration of the nanoparticles, achieving a light transmission of over 70% in the visible wavelength band (400-800 nm). With the aid of trace-mount glycerol, the film features long-term stability and flexibility. Importantly, the lead-free film shows a high shielding ability from the medical X-ray band (10-100 keV), which is comparable to Cu foil of identical thickness.

A composite panel for a toxic material encapsulation system, comprising a reinforcing structure extending within and integrally formed with a non-biodegradable thermoplastic polymer.

A composite panel for a toxic material encapsulation system, comprising a reinforcing structure extending within and integrally formed with a non-biodegradable thermoplastic polymer.

Disclosed is radiation-retarding radiation shield which is more flexible than non-toxic lead and lead alloy structures and does not disturb the user.