A multidetector alpha spectroscopy analysis system. 
This document describes the attributes of an alpha spectroscopy counting and analysis system called Low Level Pulse Height Analysis (LLPHA).  It was developed for multi-sample alpha spectroscopy analysis.  The LLPHA system is controlled by a MIK-11/2 microcomputer with 28K of memory and uses a double-density, dual floppy disk for data storage.  Detectors are interfaced to the computer via CAMAC (Computer Automated Measurement and Control) equipment.  The system simultaneously supports 32 active and independent surface-barrier alpha-particle detectors.  It operates with the total collection rate of up to 300 counts/sec from all active detectors, using 128 channels per spectrum and a dynamic energy range of 1.4 MeV. The system is not limited, however, to these conditions.  In addition to spectral acquisition, the system provides analysis functions which include peak identification, curve-smoothing, integration, linear and logarithmic scale graphics, and corrections for base-line shift, dead-time, and background counts.  These functions can be implemented while other spectra are being collected.  The LLPHA system represents a highly cost-effective means of acquiring alpha spectrometric data from a large number of samples simultaneously and with rapid data analysis capability.