REMOTE MEASUREMENT OF FIRE PARAMETERS OF THE INDUSTRIAL ACCELERATOR ELECTRON GUN

A device designed for continuous remote control of the parameters of the incandescent circuit of the electronic gun of the accelerator LU-10 has been developed. The created device allows to measure with galvanic isolation of electric quantities of operating voltage and current which are under potential of 5 kV concerning the earth bus.

CALIBRATION OF A SYSTEM FOR ON-LINE MONITORING OF ELECTRON ENERGY AND ABSORBED DOSE AT AN INDUSTRIAL ACCELERATOR LU-10

Particle beam energy and absorbed dose are critical parameters of product processing at industrial electron accelerators. For on-line monitoring of those parameters, a method based on measuring of distribution of the charge induced by irradiation in a wide-aperture stack-monitor, positioned behind an irradiated object, has been developed. A brief review of a control system for monitoring of the processing parameters created with the use of the EPICS package as well as the data of its operating experience at an LU-10 Linac of NSC KIPT are presented in the article. The procedure and results of calibration of the measuring channels within the electron energy range 8…10 MeV are described.

OPERATION OF AN INDUSTRIAL ELECTRON ACCELERATOR IN A DOUBLE-BEAM e,X-MODE

Analysis of mixed e,X-radiation formation in output devices of an industrial electron accelerator is conducted. The possibility is demonstrated to obtain an extra radiation channel on the basis of a practically free source of Xrays simultaneously with the main channel of product processing with electron beam. The conditions of production of the secondary radiation in the state of electronic equilibrium at product treatment with scanning electron beam in the main radiation channel are studied by means of computer simulation. The dependence of spatial radiant characteristics of the X-ray radiation on the spectrum of a primary electron beam and surface density of a treated load has been established. For an industrial accelerator LU-10 of NSC KIPT, the regime of object processing in the extra radiation channel is examined. The results of calculation of the X-ray dose rate and its spatial distribution are in good agreement with the experimental data. The comparative capacity of both radiation channels of the plant is analyzed. The extra radiation source can be used for the execution of non-commercial programs like sanitation of cultural artefacts.

Physical dosimetry reconstructions of significant radiation exposure at an industrial accelerator facility in Tianjin (China)

ABSTRACT The goal of this thesis is to estimate the physical radiation doses for two victims who were accidently exposed to an industrial electron beam at an industrial accelerator facility on 7 July 7 2016 in Tianjin, China. On the basis of the radiation source parameters, irradiation situation and irradiation time, physical dose reconstruction was carried out at the accident site by using a Bottle-Manikin-Absorption (BOMAB) phantom and an Alderson Radiation Therapy (ART) phantom. With thermoluminscent dosimeters (TLDs), skin estimation was conducted for the feet, calves, upper arms, left side of the body and neck, and the mean dose was estimated to be 14.1 ± 5.6 Gy. The foot and leg skin received the highest dose, which was >16.3 Gy. In addition, the mean dose estimated for the eye lens was 0.18 ± 0.07 Gy. The organ effective dose estimated and the total organs effective dose estimated were 0.46–4.94 mSv and 0.21 Sv, respectively. In the course of the accident, the damage caused by the electron radiation field to the exposed person was mainly to the skin, and the contributions to other radiation-sensitive organs were small. The damage to the organs other than the skin was mainly caused by the X-rays generated by the bremsstrahlung of the electron beam from the environment or the human body.

The Future of Industrial Accelerators and Applications

This section updates Volume 4 of the Reviews of Accelerator Science and Technology titled “Accelerator Applications in Industry and the Environment,” published in 2011 [A. W. Chao and W. Chou (eds.), Reviews of Accelerator Science and Technology, Accelerator Applications in Industry and the Environment, Vol. 4 (World Scientific, 2011)]. We also include the new material available about this field following the publication of “The Beam Business: Accelerators in Industry” in 2011 [R. W. Hamm and M. E. Hamm, Physics Today 46–51 (June 2011)] and “Industrial Accelerators and Their Applications” in 2012 [R. W. Hamm and M. E. Hamm, Industrial Accelerators and Their Applications (World Scientific, 2012)], both written and co-edited by one of us (RWH). We start with some general trends in industrial accelerator developments and applications and then move on to bringing the up-to-date developments in each article of Volume 4. In this regard, we owe a debt of gratitude to many of the authors of sections of RAST-[Formula: see text] , and they are gratefully acknowledged in each of their individual update submissions.

Research of Parameters of the Powerful Electron Beam of Industrial Accelerator ELV

This article deals the factors affecting the diameter and angle of divergence of the electron beam at the exit from the accelerator tube of an industrial ELV series accelerator. Measurements of the parameters of a high-power electron beam were carried out up to a power of 100 kW. On the basis of the data obtained, a new type of gas-dynamic extraction device was designed and pre-tested, which can efficiently output a focused electron beam to the atmosphere.