MULTI 1.1 Data Acquisition Software Nekrasov Dmitriy Kyungpook National University Spring 2005

Introduction The MULTI PARAMETER DATA ACQUISITION working on an IBM or compatible personal computer is a powerful program for multiple-parameter experiments based on the CAMAC standard. It includes hardware setup, experiment control, fast data collection, file access and management, as well as monitoring operations, data import and export and graphic display.

Properties  Up to 23 modules, arranged in one CAMAC crate, with up to 512 parameters can easily be included into the measurement.  The open character of the program and the industrial CAMAC standard allows to use in principle any CAMAC module.  A lot of modules as ADC's, TDC's, and scalers are directly supported.  Up to 16 colour-scatter plots (2-parameter display) or single channel spectra (1-parameter display) can be displayed simultaneously.  Additional a first order spectrum analyze as well as the definition of logic conditions (4-fold gate) is possible.

Architecture  Based on a high-speed CAMAC-to-PC link

Module operation  All modules included into the measurement are operated in the "master trigger" mode, i.e. a simultaneous data collection of all parameters is triggered by the LAM (CAMAC Look-At-Me) given by one in particular defined module. This module which is fixed in the <EXPERIMENT /SET-UP EXPERIMENT / OPTIONS> is characterized by an enabled LAM line in contrast to the other modules where the LAM lines are automatically disabled.

Data taking  After getting the LAM the following data collection cycle is started :

Basic experimental circuit

Multi opening screen

Multi CAMAC module setup table

Single plot spectra

Scatter plots

Spectrum analysis

Available functions

Secondary parameters  To get a rough on-line data analysis secondary parameters can be defined and derived from the real measured data.  (Ex.) P12 = (P1-P7)/(P1+P7)*1000.

Summary  MULTI 1.1-powerfil program for multiple- parameter experiments (CAMAC based).  In the same time task of configuration and programming a system of CAMAC modules for specific experiments becomes very simple.  Provides specific abilities for on-line basic data analysis.  Giving possibilities for basic data treatment during measurements etc.