CDF/PUB/SECVTX/6060 A Measurement of the Radiation

Abstract

We present direct measurements of the spatial distribution of both ionizing radiation and low energy neutrons (E n < 200 keV) inside the tracking volume of the collider detector at Fermilab (CDF). Two types of thermal luminescent dosimeters are used for these measurements. Data collected from exposures with dierent accelerator conditions allow us to separate the radiation elds into contributions from proton beam losses and from proton-antiproton collisions. Using a simple model of a power law in 1=r, where r is the distance from the beam axis we nd the power depends on the distance from the interaction point along the beam axis with the range 1.5{ 2.0. Predictions based on this model show good qualitative agreement with initial measurements of the leakage currents in the low radius silicon detectors