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  A digitizer based compact digital spectrometer for ion beam analysis using field programmable gate arrays and various energy algorithms

Jäger, M., & Reinert, T. (2013). A digitizer based compact digital spectrometer for ion beam analysis using field programmable gate arrays and various energy algorithms. Review of Scientific Instruments, 84(8): 085105. doi:10.1063/1.4817211.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0004-CDEF-9 Version Permalink: http://hdl.handle.net/21.11116/0000-0004-CDF6-0
Genre: Journal Article

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Jäger, Markus1, Author
Reinert, Tilo2, Author              
Affiliations:
1Faculty of Mathematics and Computer Science, University of Leipzig, Germany, ou_persistent22              
2Department of Physics, University of North Texas, Denton, TX, ou_persistent22              

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 Abstract: We report on the implementation of a compact multi-detector fully digital spectrometer and data acquisition system at a nuclear microprobe for ion beam analysis and imaging. The spectrometer design allows for system scalability with no restriction on the number of detectors. It consists of four-channel high-speed digitizer modules for detector signal acquisition and one low-speed digital-to-analog converter (DAC) module with two DAC channels and additional general purpose inputs/outputs to control ion beam scanning and data acquisition. Each digitizer module of the spectrometer provides its own Field Programmable Gate Array (FPGA) as digital signal processing unit to analyze detector signals as well as to synchronize the ion beam position in hard real-time. With the customized FPGA designs for all modules, all calculation intensive tasks are executed inside the modules, which reduces significantly the data stream to and CPU load on the control computer. To achieve an optimal energy resolution for all detector/preamplifier pulse shape characteristics, a user-definable infinite impulse response filter with high throughput for energy determination was implemented. The new spectrometer has an online data analysis feature, a compact size, and is able to process any type of detector signals such as particle induced x-ray emission, Rutherford backscattering spectrometry, or scanning transmission ion microscopy.

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 Dates: 2013-04-082013-07-172013-08-05
 Publication Status: Published online
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 Rev. Method: -
 Identifiers: DOI: 10.1063/1.4817211
BibTex Citekey: Jager:2013
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Title: Review of Scientific Instruments
  Abbreviation : Rev. Sci. Instrum.
Source Genre: Journal
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Publ. Info: Melville, NY : AIP Publishing
Pages: - Volume / Issue: 84 (8) Sequence Number: 085105 Start / End Page: - Identifier: ISSN: 0034-6748
CoNE: https://pure.mpg.de/cone/journals/resource/991042742033452