A PULSE GENERATOR OF X RAY QUANTS FOR REMOTE RADIATION MONITORING
The report presents the development of compact UT, which improved definition x ray image is ensured by using a diode system with a coaxial geometry acceleration of electrons to the anode electrode internal target and explosive emission cathode. UT used to run a specially designed high voltage pulse transformer based "Tesla" with surge sharpener. Describes the design and block diagram interface generator X ray quanta. Feature is the high stability of the generator is not dependent on the voltage, battery charge. Presented the results of experimental testing of the generator X ray quanta. Also shows the waveform duration x ray pulses in the presence of the lead filter and without it. Modern complex industrial facilities (nuclear reactors, elements of pipeline and rail transports, power plants turbines, heat exchangers, aircraft, etc. require the implementation of remote penetrant monitoring. At the same time, such monitoring systems are subject to the increased requirements for transportation, portability, expressness of changes. The best solution for this kind of problems is the application of portable mono block instruments based on pulse x ray acceleration tubes (AT) The weight and dimensions of mono block radiator, the power supply and control panel allow to transfer them easily and quickly mount to take effective measurements. Such radiation sources concerning small dimensions should provide the average exposure rate as ~10 mR/s within the distance of ~m from the target with the minimum area of target's radiating surface. Given parameters are obtained by generating the x ray quants in the vacuum diode AT operating in the pulsed periodic mode with the current amplitude of accelerated electrons ~kA, the pulse duration (1 10) ns and the maximum energy of electrons with several hundred keV. For this purpose, the Experimental Plant of Pulse Technique (EPPT) the subsidiary of OOO <SPECTR> IMS, with the assistance of Institute for Nuclear Research of the National Academy of Sciences of Ukrainian and NRNU MEPhI, has designed a small sized AT in which the enhancement of the x ray image clarity was provided by the diode system with the coaxial geometry of an electrons' acceleration to the internal anode electrode target [1 2] This electrodes' geometry allows to produce a cathode plasma spreading to the anode and acting as an intensive source of electrons. The electric field intensity in the anode region can reach up to ~108 V/m. While operating pulse generators of x ray quants in the field, high requirements are imposed on the mechanical and dielectric strength of AT. And therefore in order to enhance these indicators, the special high voltage ceramic insulator was suggested to be used. By means of computer simulation and physical modelling at a demountable vacuum stand information has been received on optimal geometrical dimensions of a diode acceleration system [3] that formed the basis for designing AT. Fig.1 shows its schematic section and general view.