A compact digital time differential perturbed angular correlation-spectrometer using field programmable gate arrays and various timestamp algorithms

Jäger, Markus; Iwig, Kornelius; Butz, Tilman
June 2011
Review of Scientific Instruments;Jun2011, Vol. 82 Issue 6, p065105
Academic Journal
A user-friendly fully digital time differential perturbed angular correlation (TDPAC)-spectrometer with six detectors and fast digitizers using field programmable gate arrays (FPGA) is described and performance data are given. The new spectrometer has an online data analysis feature, a compact size, and a time resolution such as conventional analog spectrometers. Its calculation intensive part was implemented inside the digitizer. This gives the possibility to change parameters (energy windows, constant fraction trigger delay) and see their influence immediately in the γ-γ correlation diagrams. Tests were performed which showed that the time resolution using a 60Co source with energy window set at 1.17 MeV and 1.33 MeV is 265 ps with LaBr3(Ce) scintillators and 254 ps with BaF2 scintillators. A true constant fraction algorithm turned out to be slightly better than the constant fraction of amplitude method. The spectrometer performance was tested with a TDPAC measurement using a 44Ti in rutile source and a positron lifetime measurement using 22Na. The maximum possible data rate of the spectrometer is 1.1 × 106 γ quanta per detector and second.


Related Articles

  • A user-friendly fully digital TDPAC-spectrometer. Jäger, M.; Iwig, K.; Butz, T. // Hyperfine Interactions;2010, Vol. 198 Issue 1-3, p167 

    A user-friendly fully digital TDPAC-spectrometer with six detectors and fast digitizers using Field Programmable Gate Arrays is described and performance data are given.

  • A perturbed angular correlation spectrometer for material science studies. Dey, C. C. // Pramana: Journal of Physics;May2008, Vol. 70 Issue 5, p835 

    A four-detector perturbed angular correlation (PAC) spectrometer has been developed with ultra-fast BaF 2 detectors to acquire four coincidence spectra simultaneously, two at 18° and two at 90°. This spectrometer has double efficiency compared to that of a three-detector set-up. Higher...

  • Data acquisition ATCA system for neutron and gamma-rays spectrometries. Pereira, R.; Fernandes, A. G.; Sousa, J.; Varandas, C. A. F. // Review of Scientific Instruments;Oct2006, Vol. 77 Issue 10, p10F511 

    Digital pulse processing (DPP) systems are known to have better performance than analog ones for neutron and/or gamma-ray pulses. DPP can synthesize almost any pulse response shape without the associated signal degradation which happens in a complex analog path. Measuring techniques involving...

  • Pulse Shape Analysis of a two fold clover detector with Empirical Mode Decomposition based algorithm. Siwal, Davinder; Manda, S.; Pali, R.; Schaffner, H.; Adamczewski, J.; Kurz, N.; Naidu, B. S.; Wollersheim, H. J.; Singh, R. // AIP Conference Proceedings;2014, Vol. 1609, p25 

    A study of Second-Generation HPGe detectors, which aim at high resolution gamma spectroscopy are underway. The study will utilize the concept of Compton imaging in semiconductors, which will be probed by the Pulse Shape Analysis (PSA) and Gamma-Ray Tracking (GRT) algorithms. The γ-ray track...

  • Microcomputer-controlled perturbed angular correlation spectrometer. Jaeger, H.; Gardner, J. A.; Su, H. T.; Rasera, R. L. // Review of Scientific Instruments;Sep87, Vol. 58 Issue 9, p1694 

    A four-detector time-differential perturbed angular correlation spectrometer controlled by an inexpensive microcomputer is described. The use of twin-single-channel analyzers permits each detector to identify both gamma rays in the cascade. An improved gating logic system reduces the...

  • A POWER EFFICIENT LINEAR EQUATION SOLVER ON A MULTI-FPGA ACCELERATOR. Sudarsanam, A.; Hauser, T.; Dasu, A.; Young, S. // International Journal of Computers & Applications (Acta Press);2010, Vol. 32 Issue 1, p56 

    This paper presents an approach to explore a commercial multi field programmable gate array (FPGA) system as high performance accelerator and the problem of solving an LU decomposed linear system of equations using forward and back substitution is addressed. Block-based right-hand-side solver...

  • Dynamic Partial Reconfigurable FFT for OFDM Based Communication Systems. Vennila, C.; Lakshminarayanan, G.; Ko, Seok-Bum // Circuits, Systems & Signal Processing;Jun2012, Vol. 31 Issue 3, p1049 

    This paper presents a novel scalable and runtime dynamically reconfigurable FFT architecture for different wireless standards. With only 8 butterfly units, a reconfigurable FFT architecture for three different FFT points is realized using mixed radix-2/2/2 FFT algorithm in a modified Single-path...

  • DESIGN AND IMPLEMENTATION OF MODIFIED DISTRIBUTIVE ARITHMETIC BASED DWT ARCHITECTURE USING FPGA. Senthil Kumar, S.; Radhakrishnan, R.; Priyadharshini, K. // Applied Mechanics & Materials;2014, Issue 550, p172 

    This paper presents a modified distributive arithmetic based DWT architecture and is implemented in FPGA. The modified DA-DWT architecture has a latency of 44 clock cycles and a throughput of 4 clock cycles. This design is twice faster than the reference design and is thus suitable for...

  • Space babies. Ananthaswamy, Anil // New Scientist;02/03/2001, Vol. 169 Issue 2276, p26 

    Reports on electronics engineers' development of space probes that are able to adapt to harsh environments, repair themselves, and evolve. Problems with space probes such as the National Aeronautics and Space Administration's (NASA) Galileo craft, which suffered radiation damage on its flight...


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics