A. Castoldi et al., A NEW SILICON DRIFT DETECTOR WITH REDUCED LATERAL DIFFUSION, Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment, 377(2-3), 1996, pp. 375-380
We present a method to reduce the effect of diffusion in the direction
transverse to the drift in silicon drift detectors. This is achieved
by creating regions of deep p-implant parallel to the drift direction
that act as rigid guidelines during the drift of the charge cloud gene
rated by a radiation interaction. The influence of the deep implanted
accepters on the lateral confining held is discussed. A prototype has
been designed, fabricated and tested. First experimental results are r
eported which demonstrate the achieved reduction of the lateral width
of the electron cloud with respect to free broadening.