Determination of space charge distributions in highly segmented large volume HPGe detectors from capacitance–voltage measurements

✍ Scribed by B. Birkenbach; B. Bruyneel; G. Pascovici; J. Eberth; H. Hess; D. Lersch; P. Reiter; A. Wiens

• Publisher: Elsevier Science
• Year: 2011
• Tongue: English
• Weight: 866 KB
• Volume: 640
• Category: Article
• ISSN: 0168-9002
• DOI: 10.1016/j.nima.2011.02.109

✦ Synopsis

The space charge distribution of a large volume highly segmented HPGe detector was determined by a non-destructive capacitance-voltage measurement. The capacitances between the 36 segments and the core were measured simultaneously with a precision pulser which was implemented in the core preamplifier. The pulser measurement was compared to and validated by direct capacitance measurements. The three-dimensional doping profile was reconstructed using analytical and numerical methods. Consistent values for the impurity concentration in the range of 0.5 and 1.5 Â 10 10 cm À 3 were obtained.