Abstract: An apparatus for the dosimetry of fast neutrons comprises one or more personal detectors in the form of test tubes made of transparent insulating material and a tank with a holder for suspending said test tubes in an upright position within the tank all at the same level. After exposure of said test tubes to radiation of fast neutrons, they are placed in the tank and filled with an electrolyte into which an electrode is immersed. The tank also is filled with the same liquid up to the same level as the test tubes and an electrode is immersed also into the liquid within the tank. The electrodes within the test tubes are collectively connected to one terminal of a high voltage alternating or pulsating function generator of which the other terminal connects with the electrode within the tank. The tracks of damage by said neutrons are thus developed to the required extent and subsequently inspected for evaluating the amount of the traces of damage.Different forms of the test tubes are disclosed.

Abstract: A solar electric generator comprises a concentrator of the sun radiation consisting of a system of lenses which focalize the sun radiation into a vessel of which the bottom--that is the wall opposite to the radiation inlet--comprises a thermoionic stage, that is a high temperature electron emitter and a collector which are separated by a low pressure gaseous mixture. At thermal contact with the receiver of the thermoionic stage, a thermoelectric stage is provided, that is a plurality of couples of semiconductor material bars, one of the P type and the other of the N type. One of the ends of each couple is in contact with the collector of the thermoionic stage and the other end is in contact with a heat draining means for transferring the heat from the thermoelectric stage to the atmosphere.The electrical output from said two stages is taken out of the generator and suitably transformed to meet the user's requirement.

Abstract: An apparatus for the electrochemical development of damage tracks in dielectric transparent material sheets comprises a first elongated prismatic vessel within which an axial cavity is provided extending over most of the prism length and communicating with a circular transverse cavity which extends from an opening on one face of the prism thereinto for less than one half of the prism thickness; said longitudinal and transverse cavities being so dimensioned that when enough liquid is supplied thereinto for abundantly flooding the transverse cavity with the vessel upright and the transverse cavity lowermost, the same liquid will not reach the bottom of the transverse cavity when the vessel is set horizontally with the transverse cavity opening up.

Abstract: A hollow disk is carried on a wheeled frame or trolley which is moved over the surface being examined. The hollow disk is slidable perpendicularly to its surface within certain limits. The disk is double walled and a certain degree of vacuum is maintained in the space between the walls during the apparatus operation.The disk wall facing the surface being examined is provided with holes and on the outer surface of the same wall a disk of para rubber is spread which is provided with the same array of holes as the hollow disk wall; the holes of the disk wall being aligned with the holes of the para rubber disk.For each sampling operation a fresh smear disk is applied on the para rubber layer which adheres thereon by the action of the dynamic vacuum existing within the hollow disk. The hollow disk is biased outwards of the frame by a calibrated spring inserted between the disk and the frame structure.

Abstract: A simulator of the aerosol particle disposition in the human respiratory tract comprises a duct along which the following devices are included in the order: an air humidifier comprising a trunk with longitudinal partitions of blotted paper soaked with water, a cyclone, a vibrated bubbler comprising a cylindrical vertical vessel partially filled with water and provided with a pierced horizontal partition at a level lower than the water level within said vessel, a vacuum pump, a flowmeter. The air to be tested is passed through said duct for a predetermined time period and at a predetermined flow rate. Subsequent to said passage, physical, chemical, toxicological, radiometric analyses are carried out either on the water itself or on the solid therein contained or on both.