LAUSR

Abstract In electron curtain accelerator, the absorbed dose and its uniformity, electron energy loss through beam extract window and its lifetime are key factors for users. To facilitate design and application of curtain electron accelerator in 100–300 keV energy range, with the typical electron beam current (43 mA) and 13-µm-thick extract titanium window, the amount of doses immediately after the extract window, on the target position and at the depth of 1 mm of the target was obtained by MCNP4C code. The results of this simulation showed that with increasing energy, dose increases at indicated positions. It is shown that, by increase the incident beam energy from 100 keV to 300 keV, the temperature on the titanium extract window decreased from 104 to 42 degrees centigrade, respectively. Furthermore, lateral dose distribution and beam energy loss through the typical extract window was obtained based on CASINO numerical simulation package and compared with analytical results.