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Development of a three-dimensional data acquisition method for standardization of beta-emitting nuclides
Summary
A new 3D data system uses Successive Approximation Register (SAR) ADCs and DRAM for precise pulse height and time measurements. This advanced system enhances nuclear physics experiments requiring coincidence distributions.
Area of Science:
- Nuclear Physics
- Instrumentation
- Data Acquisition
Background:
- Accurate measurement of pulse height and time is crucial for nuclear physics experiments.
- Existing systems may have limitations in temporal resolution and data storage capacity.
Purpose of the Study:
- To develop a high-resolution 3D data acquisition system.
- To enable precise multi-scaling of detector signals with short dwell times.
- To improve the analysis of experiments requiring coincidence distributions.
Main Methods:
- Utilized three Successive Approximation Register (SAR) Analog-to-Digital Converters (ADCs).
- Implemented a 32 MHz oscillation clock and 192 Mbyte Dynamic Random Access Memory (DRAM).
- Developed a 40-bit data storage format (12-bit pulse height, 28-bit clock time).
Main Results:
- Achieved dwell times as short as 31 ns.
- Successfully stored both pulse height and time information in DRAM.
- Demonstrated the system's capability by measuring 14C activity using a 3-PM liquid scintillation system.
Conclusions:
- The developed 3D data acquisition system offers high precision for nuclear measurements.
- The system is particularly advantageous for experiments involving double and triple coincidence distributions.
- The integration of computer discrimination and multi-channel time scaling (MCTS) enhances analysis efficiency.