전자선의 Virtual Source Distance의 공기중 측정법

Abstract

Authors have measured virtual source distance of electron beam from CL/1800 medical linear accelerator, with newly designed method. Beam scanning was performed with the direction of beam axis in the air. Compared results between this study and well established in-phamtom measurement showed good agreement within experiment error.

And we have found that build-up cap plays very important role in air measurement because of charge build up.

The nethod of in-air measurement of virtual source distance is very easy to setup and generate accurate results.

Authors have measured virtual source distance of electron beam from CL/1800 medical linear accelerator, with newly designed method. Beam scanning was performed with the direction of beam axis in the air. Compared results between this study and well established in-phamtom measurement showed good agreement within experiment error.

And we have found that build-up cap plays very important role in air measurement because of charge build up.

The nethod of in-air measurement of virtual source distance is very easy to setup and generate accurate results.