def calculateDetectorArea(self):
        """
        Calculates the area used in a detector
        """
        area = 0.0
        r = self.geoParam['CylinderLightGuideRadius']
        while(r + self.geoParam['DetectorThickness'] < self.geoParam['CylinderRadius']):
            area -= math.pow(r,2)
            r += self.geoParam['DetectorThickness']
            area += math.pow(r,2)
            r += self.geoParam['DetectorSpacing']
        return math.pi*area