A new system for real-time data acquisition and pulse parameterization for digital positron annihilation lifetime spectrometers with high repetition rates

被引：48
作者：
Hirschmann, E. [1 ]
Butterling, M. [1 ]
Acosta, U. Hernandez [1 ,2 ]
Liedke, M. O. [1 ]
Attallah, A. G. [1 ]
Petring, P. [1 ]
Goerler, M. [1 ]
Krause-Rehberg, R. [3 ]
Wagner, A. [1 ]
机构：
[1] Helmholtz Zentrum Dresden Rossendorf, Inst Radiat Phys, Bautzner Landstr 400, D-01328 Dresden, Germany
[2] Helmholtz Zentrum Dresden Rossendorf, Ctr Adv Syst Understanding, Untermarkt 20, D-02826 Gorlitz, Germany
[3] Martin Luther Univ Halle Wittenberg, Dept Phys, Von Danckelmann Pl 3, D-06120 Halle, Germany
来源：
JOURNAL OF INSTRUMENTATION | 2021年 / 16卷 / 08期
关键词：
Data reduction methods; Digital signal processing (DSP); Detection of defects; Online farms and online filtering; ULTRA-FAST DIGITIZERS; SPECTROSCOPY; ELBE;
D O I：
10.1088/1748-0221/16/08/P08001
中图分类号：
TH7 [仪器、仪表];
学科分类号：
0804 ; 080401 ; 081102 ;
摘要：
We present a new system for high repetition rate and real-time pulse analysis implemented at the Monoenergetic Positron Source (MePS) at the superconducting electron LINAC ELBE at Helmholtz-Zentrum Dresden-Rossendorf. Dedicated digital signal processing and optimized algorithms are employed allowing for high bandwidth throughput, online pulse analysis and filtering. Positrons generated from radioisotopes and from bremsstrahlung pair production by means of highly intense accelerator-based positron beams serve as a microstructure probe allowing material characterizations with respect to chemical, mechanical, electrical, and magnetic properties. Positron annihilation lifetime events with up to 13 MHz repetition rate are being processed online without losses while performing signal selections for pile-up reduction, online energy calibration, and - for radioisotope-based measurements - identification of start and stop events.
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页数：16
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