Hit efficiency study of CMS prototype forward pixel detectors

In this paper I describe the measurement of the hit efficiency of a prototype pixel device for the CMS forward pixel detector. The data were taken with the 120 GeV proton beam at Fermilab during the period of December 2004-February 2005. The detectors proved to be highly efficient (99.27±0.02%). The inefficiency was primarily located near the corners of the individual pixels.