High-speed nuclear quality pulse height analyzer for synchrotron-based applications

A high throughput pulse height analyzer system for synchrotron-based applications requiring high resolution, high processing speed and low dead time has been developed. The system is comprised of a 120ns 12-bit nuclear quality ADC with a self-adaptive fast peak detector-stretcher and a custom-made fast histogramming memory module that records and processes the digitized data. The histogramming module is packaged in a VME/VXI compatible interface. Data is transferred through a fast optical link from the memory interface to a computer. A dedicated data acquisition program matches the hardware characteristics of the histogramming memory module. The data acquisition system allows for different data collection modes. The system can acquire data in synchronization with an external trigger or operate as a standard pulse height analyzer. Acquisition can be performed on several channels simultaneously. A two-channel prototype has been demonstrated at the Stanford Synchrotron Radiation Laboratory accelerator in conjunction with a fluorescence XAFS spectroscopy experiment. A detailed description of the entire system is given and experimental data shown.