POSITION-SENSITIVE SINGLE-PHOTON DETECTION WITH A HYBRID SILICON PIXEL ARRAY TUBE

The hybrid Imaging Silicon Pixel Array (ISPA) tube combines the best a spects of image intensification with new possibilities offered by inte grated electronics. The anode of the ISPA tube is a matrix of small si licon pixels directly detecting with a high spatial resolution electro ns emitted by the photocathode. The pixels are individually bump-bonde d to an integrated electronic read-out chip, allowing high gain, high speed and low noise. This paper presents a detailed study of the singl e-photon detection efficiency of the tube, and concludes with perspect ives offered by the development of new electronics and tube designs.