Title :
Generation of bremsstrahlung fields of higher than 1013 rad/s intensity in the mode of LIA-30 electron beam focusing
Author :
Punin, V.T. ; Zavyalov, N.V. ; Basmanov, V.F. ; Gordeev, V.S. ; Grishin, A.V. ; Grunin, A.V. ; Gerasimov, A.I. ; Gornostay-Pol´sky, S.A. ; Gritsina, V.P. ; Tikhonov, A.I. ; Lazarev, S.A. ; Musin, I.Z. ; Model, B.I. ; Zverev, O.V.
Author_Institution :
Russian Fed. Nucl. Center, All-Russia Sci. Res. Inst. of Exp. Phys., Sarov, Russia
Abstract :
In order to increase the achieved before bremsstrahlung dose rate (~ 7·1012 rad/s) of a 36-module linear accelerator LIA-30 functioning in the mode of electron beam focusing, the installed in the injector cathode with emitter diameters of 60 and 150 mm was lengthened by 630 mm to increase injection energy and current of the beam. To decrease internal diameter of electron flux the second annular cathode 250 mm in diameter installed in the 15th module was disassembled. The program of time synchronization of accelerating modules turn-on aimed for increasing maximal beam current was optimized. As a result there were obtained radiation dose rate of ~ 1.5·1013 and dose of 240 krad (TLD) in a spot of 100 cm2 area with irradiation inhomogeneity of 50 % at radiation pulse duration τ1/2≈ 16 ns.
Keywords :
bremsstrahlung; dosimetry; electron beam focusing; linear accelerators; particle beam injection; LIA-30 electron beam focusing; accelerating module turn-on; beam current; bremsstrahlung dose rate; bremsstrahlung field generation; electron flux internal diameter; injection energy; injector cathode; irradiation inhomogeneity; radiation dose rate; radiation pulse duration; second annular cathode; size 630 mm; time synchronization; Acceleration; Focusing;
Conference_Titel :
High-Power Particle Beams (BEAMS 2004), 2004 International Conference on
Conference_Location :
St. Petersburg
Print_ISBN :
978-5-87911-088-3
