MULTI 1.1 Data Acquisition Software

Nekrasov Dmitriy

Kyungpook National UniversitySpring 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 oflogic 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.