Cj. Kenney et al., A PROTOTYPE MONOLITHIC PIXEL DETECTOR, Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment, 342(1), 1994, pp. 59-77
The performance of a monolithic pixel detector with both detecting ele
ments and readout circuitry in the same piece of high-resistivity sili
con and providing three-dimensional position information is described.
The basic pixel cell is 34 X 125 mum2. The most-probable signal for a
minimum-ionizing particle was observed to be 65 times the single-chan
nel, root-mean-square noise in a muon beam. With different off-chip el
ectronics, used with a gamma-ray source, the noise was found to be 2.3
times lower. A spatial resolution of 2.0 mum was obtained in the dire
ction of 34 mum pitch for normally incident high-momentum muons. For t
racks of up to 56-degrees to the normal the spatial resolution was und
er 7 mum. Results of a simulation program for calculating charge sprea
ding and drift times are presented and compared with observations.