Planar LAAPDs: Temperature Dependence, Performance, and Application in Low Energy X-ray Spectroscopy
Abstract
An experiment measuring the 2S Lamb shift in muonic hydrogen mup is being performed at the Paul Scherrer Institute, Switzerland. It requires small and compact detectors for 1.9 keV x rays (2P-1S transition) with an energy resolution around 25% at 2 keV, a time resolution better than 100 ns, a large solid angle coverage, and insensitivity to a 5 T magnetic field. We have chosen Large Area Avalanche Photodiodes (LAAPDs) from Radiation Monitoring Devices as x-ray detectors, and they were used during the last data taking period in 2003. For x-ray spectroscopy applications, these LAAPDs have to be cooled in order to suppress the dark current noise, hence, a series of tests were performed to choose the optimal operation temperature. Specifically, the temperature dependence of gain, energy resolution, dark current, excess noise factor, and detector response linearity was studied. Finally, details of the LAAPDs application in the muonic hydrogen experiment as well as their response to alpha particles are presented.
Cite
@article{arxiv.physics/0410099,
title = {Planar LAAPDs: Temperature Dependence, Performance, and Application in Low Energy X-ray Spectroscopy},
author = {L. Ludhova and F. D. Amaro and A. Antognini and F. Biraben and J. M. R. Cardoso and C. A. N. Conde and D. S. Covita and A. Dax and S. Dhawan and L. M. P. Fernandes and T. W. Hansch and V. W. Hughes and O. Huot and P. Indelicato and L. Julien and P. E. Knowles and F. Kottmann and J. A. M. Lopes and Y. -W. Liu and C. M. B. Monteiro and F. Mulhauser and F. Nez and R. Pohl and P. Rabinowitz and J. M. F. dos Santos and L. A. Schaller and D. Taqqu and J. F. C. A. Veloso},
journal= {arXiv preprint arXiv:physics/0410099},
year = {2009}
}
Comments
20 pages, 19 figures, submitted to Nucl. Instr. and Methods A