![]() That is why an innovative DPP architecture is proposed in this paper. However, today's programmable solutions do not meet the need of performance to operate online and not allow scaling with the increase in the number of measurement channel. This would reduce prototyping and test duration by reducing the level of hardware expertise to implement new algorithms. For all these reasons, a programmable Digital pulse Processing (DPP) architecture in a high level language such as Cor C++ which can reduce dead-time would be worthwhile for nuclear instrumentation. However, dedicated hardware algorithm implementations on re-configurable technologies are complex and time-consuming. These two issues have led current architectures to use dedicated solutions based on re-configurable components like Field Programmable Gate Arrays (FPGAs) to overcome the need of performance necessary to deal with dead-time. Despite the possibility of treating the pulses independently from each other, current architectures paralyze the acquisition of the signal during the processing of a pulse. The second is the real-time requirement, which implies losing pulses when the pulse rate is too high. The first is the Poissonian characteristic of the signal, composed of random arrival pulses which requires to current architectures to work in data flow. These processes are traditionally more ยป performed offline due to two issues. Another example is pileups which are generally rejected while pileup correction algorithms also exist. This is especially true for neutron-gamma discrimination applications which traditionally use charge comparison method while literature proposes other algorithms based on frequency domain or wavelet theory which show better performances. However, these improvements are not yet implemented in instrumentation devices. These applications are the topic of many researches, new algorithms and implementations are constantly proposed thanks to advances in digital signal processing. The field of nuclear instrumentation covers a wide range of applications, including counting, spectrometry, pulse shape discrimination and multi-channel coincidence. One such device was tested and is discussed is this = , While most of the devices are dual-channel, there are multi-channel devices now available that will allow modal type of synchronous sampling. Sample rates as high as 192 KHz are supported with 16 and 24-bit resolution. Various performance metrics are explored including frequency response, noise floor, and synchronous sampling. This paper explores the performance of several candidate audio recording devices that can be used as high-speed analog-to-digital converters for such measurement systems. ![]() The most important device to be selected is the analog-to-digital converter. The architecture allows a mix-and-match level of configurability so the designer can select devices that best match the desired performance trade-offs. ![]() One twenty-channel system based on this approach has been operating almost 4 years at ORNL. The Oak Ridge National Laboratory (ORNL) has pioneered an approach where low-cost consumer-grade electronics can be used as the basis of a highly reliable data acquisition architecture. ![]()
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