Dynamical Study of the Radiation Environment at the Interaction Region of BEPC

A method to study dynamically the radiation environment at the interaction region of the Beijing Electron-Positron Collider is described. It is shown that the radiation levels are closely correlated to the beam conditions of the collider: most radiation occurs during injection and sudden loss (or dump) of beam, while Colliding beams produce at least an order of magnitude less radiation background which decreases gradually with time. By using this method, an extra source of background for the Beijing Spectrometer experiment at the collider has been found and eliminated.