The program MePASto was developed to facilitate the data reduction and data 
analysis of Coincidence Doppler Broadening (CDB) spectra. The spectrum is a 
function of two energies (sampled by detector 0 and detector 1) and can be 
displayed as a two-dimensional plot. The main problem in data reduction is to find 
the axis, which represents the coincident events, and to make the data along 
this axis available for further analysis.

MePASto was written at Joanneum University of Applied Sciences, Department of 
Automotive Engineering, as a student research project by four students in their 
third semester (Alexander Harrich, Sebastian Jagsch, Stefan Riedler and Walter Rosinger). The program 
is available free of charge and can be downloaded from 
http://fahrzeugtechnik.fh-joanneum.at/links/MePASto as a zip-file (mepasto.zip) 
that includes the program with the setup routine and a 2D spectrum 
(spectrum.txt) in ASCII format, which can be used for program testing. The 
spectrum consists of 1025x1025 data points with an energy resolution of 0.073 
keV per “pixel”. The program is written in ANSI C with a Visual Basic GUI and 
can be operated on MS Windows operating systems. It includes a manual, which is 
available by pressing the “help” button. Additionally you can find a description in http://www.ajur.uni.edu: 
A.Harrich, S. Jagsch, S. Riedler and W. Rosinger, 
Computerized Data Reduction and Analysis in Positron Annihilation Coincidence Doppler Broadening Spectroscopy,
 American Journal of Undergraduate Research, Vol. 2, No. 3 (2003) p. 13.

Although the program was tested carefully we cannot guarantee that the 
program is free of errors or that it will meet your requirements. Unfortunately 
the program cannot be supported, nevertheless feel free to contact us if you have any comments or if you need 
further information (guenter.bischof@fh-joanneum.at).  

Graz, 2004-01-30