An Overview of the NOMADD and CADET Data Acquisition Systems.
Martinez, Francis J. [Los Alamos National Laboratory] · OSTI OAI (U.S. Department of Energy Office of Scientific and Technical Information) · 2024
The Testing and Advanced Diagnostics group, WT-4, at Los Alamos National Laboratory (LANL) provides testing and evaluation services for weapons, satellites, and other complex mechanical and electrical systems.It utilizes state-of-the-art sensors, diagnostic suites, test equipment and data acquisition systems to conduct the required testing, and in addition, develops new technology for advanced diagnostic requirements.Two of the portable data acquisition systems used by WT-4 are the (CADET) Continuous Acquisition of Data for Environmental Testing and (NOMADD) Network Of Modules for Acquisition of Digital Data.CADET is a 16-bit system that can capture up to 128 channels of data of various input types.CADET can sample at data rates up to 100 kilosamples/second (100 kS/s) for each rack of data (32 channels/rack).NOMADD is a 12-bit system that can capture 120 channels of data of various input types.NOMADD can sample at data rates up to 1 Megasample/second (1 MS/s) for each channel.A recent application of the NOMADD system is detailed below: Recently, models developed at LANL showed that an explosion in one bay of a high explosives processing facility produces wrar:raround pressures capable of blowing in the relief panels of adjacent bays with catastrophic injury potential to the affected worker.An engineering solution to prevent the relief panel from blowing into the adjacent bay was developed.An ensuing experiment was perfonned to prove the validity of this solution .In this experiment , a 50 pound charge of TNT was detonated at 40 feet from the relief panel to simulate the largest wrar:raround pressure wave that was possible in the HE bays.The objective of the test was to certify that a Kevlar net and its installation hardware was adequate to restrain the relief panels during a blast.The NOMADD system was used to capture the data from pressure transducers to validate the models.