Development of a Super B-Factory Monolithic Active Pixel Detector — the Continuous Acquisition Pixel Prototypes

The innermost layer of the Belle silicon vertex detector operates 1.5 cm away from the collision point of the highest luminosity collider in the world. Occupancy in this innermost layer is already 10% and expected to continue increasing with the planned significant luminosity increases. A pair of prototype detectors has been developed to address this problem, based upon the same CMOS camera technology now widely deployed in low-cost consumer devices such as cellular telephones. Problems unique to operating in a high luminosity B-factory environment are discussed. Results from a number of tests are presented, demonstrating the viability of this detector technology.