Atmospheric neutron single event effect test on Xilinx 28 nm system on chip at CSNS-BL09

In this paper, we have developed a radiation-hardened non-volatile lookup table (LUT) circuit utilizing spin Hall effect (SHE)-magnetic random access memory (MRAM) devices. The design is motivated by modeling the effect of radiation particles striking hybrid complementary metal oxide semiconductor/spin based circuits, and the resistive behavior of SHE-MRAM devices via established and precise physics equations. The models developed are leveraged in the SPICE circuit simulator to verify the functionality of the proposed design. The proposed hardening technique is based on using feedback transistors, as well as increasing the radiation capacity of the sensitive nodes. Simulation results show that our proposed LUT circuit can achieve multiple node upset (MNU) tolerance with more than 38% and 60% power-delay product improvement as well as 26% and 50% reduction in device count compared to the previous energy-efficient radiation-hardened LUT designs. Finally, we have performed a process variation analysis showing that the MNU immunity of our proposed circuit is realized at the cost of increased susceptibility to transistor and MRAM variations compared to an unprotected LUT design.

https://iopscience.iop.org/article/10.1088/1361-6463/aa9781/pdf

Radiation-hardened MRAM-based LUT for non-volatile FPGA soft error mitigation with multi-node upset tolerance

The development of some Spanish national research projects has contributed to improve CNA capabilities to perform irradiation testing for aerospace applications. An overview on the Centre evolution during the last years will be presented. A particular study on current capability to perform fault injection campaigns on a microprocessor, first time using both proton and neutron beamlines, will be shown in this work.

/pdf/progress-of-cna-to-become-the-spanish-facility-for-combined-jksj87ocx5.pdf

Progress of CNA to become the Spanish facility for combined irradiation testing in aerospace

i-TED is an innovative detection system which exploits Compton imaging techniques to achieve a superior signal-to-background ratio in ($n,\gamma$) cross-section measurements using time-of-flight technique. This work presents the first experimental validation of the i-TED apparatus for high-resolution time-of-flight experiments and demonstrates for the first time the concept proposed for background rejection. To this aim both $^{197}$Au($n,\gamma$) and $^{56}$Fe($n, \gamma$) reactions were measured at CERN n\_TOF using an i-TED demonstrator based on only three position-sensitive detectors. Two \cds detectors were also used to benchmark the performance of i-TED. The i-TED prototype built for this study shows a factor of $\sim$3 higher detection sensitivity than state-of-the-art \cds detectors in the $\sim$10~keV neutron energy range of astrophysical interest. This paper explores also the perspectives of further enhancement in performance attainable with the final i-TED array consisting of twenty position-sensitive detectors and new analysis methodologies based on Machine-Learning techniques.

Imaging neutron capture cross sections: i-TED proof-of-concept and future prospects based on Machine-Learning techniques

The Centro Nacional de Aceleradores is a user-oriented accelerator facility in Seville, Spain. Its main facilities are a 3 MV tandem accelerator, an 18 MeV proton Cyclotron, a tandetron used for AMS, a compact accelerator used for radiocarbon measurements, a $$^{60}$$
 Co irradiator and a PET/CT scanner. The technical specifications and research applications of these facilities are described. A neutron beam line associated to a charged pulsed beam in the tandem allows for time of flight measurements which determine the neutron energy. The use of an adequate stripper gas in the AMS tandetron permits to measure heavy radionuclides with very low detection levels, allowing to perform environmental studies using these radionuclides as tracers. The use of the microbeam in the tandem accelerator allows to apply the ion beam-induced current technique to investigate the spectroscopic properties and radiation hardness of different semiconductor detectors.

/pdf/research-facilities-and-highlights-at-the-centro-nacional-de-59cnl5xhl5.pdf

Research facilities and highlights at the Centro Nacional de Aceleradores (CNA)

Soft error rate comparison of 6T and 8T SRAM ICs using mono-energetic proton and neutron irradiation sources

The first neutron time-of-flight line in Spain: Commissioning and new data for the definition of a neutron standard field

Neutron radiography is a non-invasive imaging technique that uses the attenuation of a neutron beam as a probe to characterize an object [1]. At Centro Nacional de Aceleradores (CNA) in Seville, we want to make the best use of our facilities, particularly in terms of the beams characteristics and neutron production, to obtain the best contrast and spatial resolution possible with a neutron camera. For this purpose, we have tested a comercial camera with a fast-neutrons converter on different configurations of the beam and the neutron production target. This has resulted in a first assessment of the limitations, future requirements and viability of introducing neutron radiography as one of the available analysis tools at CNA.

Neutron Radiography at CNA

The 3 MV Tandem Pelletron accelerator at the Spanish Accelerator Laboratory (CNA) has been recently upgraded to produce pulsed ion beams for neutron Time-Of-Flight (TOF) measurements. The upgrade has consisted of two actions: a pulsing system installed at the low energy part of the Tandem accelerator and a new line fully equipped. The pulsing system provides approximately one nanosecond pulse width of protons with variable repetition rates from kHz down to MHz. The new line is equipped with conventional devices and a pick-up for timing measurements with high resolution. The properties of the whole system have been tested under various working conditions and they are described in some detail.

Nanosecond pulsed proton beam: upgrade of the accelerator-based neutron facility HiSPANOS at CNA (Spain)

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Papers

Soft error rate comparison of 6T and 8T SRAM ICs using mono-energetic proton and neutron irradiation sources

The first neutron time-of-flight line in Spain: Commissioning and new data for the definition of a neutron standard field

Neutron Radiography at CNA

Nanosecond pulsed proton beam: upgrade of the accelerator-based neutron facility HiSPANOS at CNA (Spain)