Synthetic single crystal diamond as a fission reactor neutron flux monitor

Marinelli, M.; Milani, E.; Prestopino, G.; Tucciarone, A.; Verona, C.; Verona-Rinati, G.; Angelone, M.; Lattanzi, D.; Pillon, M.; Rosa, Roberto De; Santoro, Emilio

doi:10.1063/1.2734921

Cited by 34 publications

(45 citation statements)

References 9 publications

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“…Since that time, detectors have improved and cover much more of the energy spectrum than would be required to perform any imaging in humans. Despite advances, current detectors are specific for defined neutron energies, are not linear, and do not cover the entire energy spectrum (Vartsky, Mor et al 2005;Marinelli, Milani et al 2006;Marinelli, Milani et al 2007;Mayer, Forkel-Wirth et al 2007;Dangendorf, Bar et al 2009;Mor, Vartsky et al 2009;Ruddy, Flammang et al 2009;Ruddy, Seidel et al 2009;Vartsky, Mor et al 2010).…”

Section: Medical Applications Of Neutron Imagingmentioning

confidence: 99%

Large-Scale User Facility Imaging and Scattering Techniques to Facilitate Basic Medical Research

Miller¹,

Bilheux²,

Gleason³

et al. 2011

Medical Imaging

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Section: Medical Applications Of Neutron Imagingmentioning

confidence: 99%

Large-Scale User Facility Imaging and Scattering Techniques to Facilitate Basic Medical Research

Miller¹,

Bilheux²,

Gleason³

et al. 2011

Medical Imaging

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“…Moreover, CVD diamond-based electronics can operate in high-temperature and harsh environments, e.g., under the condition of ionizing radiation, where the operation of conventional semiconductor devices is limited [4][5][6][7][8]. These unique characteristics have been realized in devices capable of replacing silicon-based devices, such as thermal and fast neutron detectors in nuclear fusion reactors [9]. Radiation detectors are also required in such applications, and CVD diamond-based devices can offer excellent performance with great optical efficiency and robustness in extreme environments.…”

Section: Introductionmentioning

confidence: 99%

Influence of the Thin-Film Ag Electrode Deposition Thickness on the Current Characteristics of a CVD Diamond Radiation Detector

2018

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Background:We investigated the current characteristics of a thin-film Ag electrode on a chemical vapor deposition (CVD) diamond. The CVD diamond is widely recognized as a radiation detection material because of its high tolerance against high radiation, stable response to various dose rates, and good sensitivity. Additionally, thin-film Ag has been widely used as an electrode with high electrical conductivity. Materials and Methods:Considering these properties, the thin-film Ag electrode was deposited onto CVD diamonds with varied deposition thicknesses (≒50/98/152/257 nm); subsequently, the surface thickness, surface roughness, leakage current, and photo-current were characterized. Results and Discussion:The leakage current was found to be very low, and the photo-current output signal was observed as stable for a deposited film thickness of 98 nm; at this thickness, a uniform and constant surface roughness of the deposited thin-film Ag electrode were obtained. Conclusion:We found that a CVD diamond radiation detector with a thin-film Ag electrode deposition thickness close to 100 nm exhibited minimal leakage current and yielded a highly stable output signal. JRPRScience and ICT (MSIT) of Republic of Korea.

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“…The production of SCD detectors with a layered structure represented an important break-through achieved by our group. The layered detectors [5] demonstrated excellent properties such as long lasting stability and thus no polarization effects, high energy resolution, typically around 1% (FWHM), and have been tested and proposed for many applications which range from neutron to UV detection [6,7,8] including soft X-ray measurement and dosimetry.…”

Section: Introductionmentioning

confidence: 99%

“…An example of SCD+LiF used as on-line tritium monitor is presented in a companion paper in this conference [12]. The 6 LiF covered detector was also used as neutron flux monitor in a TRIGA reactor surviving to a neutron fluence of 2*10 16 n/cm 2 [7].…”

Section: Introductionmentioning

confidence: 99%

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Neutron spectroscopy by means of artificial diamond detectors using a remote read out scheme

Angelone

Aielli

Almaviva

et al. 2009

2009 1st International Conference on Advancements in Nuclear Instrumentation, Measurement Methods and Their Applications

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Artificial crystal diamond neutron detectors are under test at JET tokamak since 2003 and they have demonstrated to be reliable and stable as well as to withstand the harsh working condition available in a large tokamak. Up to now they were used to measure the total and time dependent neutron emission while neutron spectroscopy was never attempted. On the other hand neutron spectrometry con yields important information on the burning plasma and it is requested for future experiments that will use DT plasmas so producing 14 MeV neutrons. Neutron spectrometry can only be attempted by using single crystal diamond (SCD) which, as it has been demonstrated, can show an energy resolution (FWHM) as low as 0.5%.However, in a future fusion reactor such as ITER, the huge neutron and gamma fluxes as well as the high temperature will not allow the electronics to be located close to the detector measuring point and near the plasma. For this reason it is necessary to develop a new approach in which new detectors able to withstand harsh environments and the electronics are far apart. This is a very challenging task if it is devoted to perform signal Pulse Height Analyses (PHS) with high energy resolution.To exploit this concept a SCD detector covered with a thin layer of 6 LiF was installed at JET during the 2008 experimental campaigns and equipped with a remote read-out scheme located about 100 m away from the detector. The detector's signal was transported up to a conceptually new fast charge amplifier (FCA) developed to fulfil the task by means of a high frequency, single, low attenuation, super-screened cable. This FCA is able to read, stretch (up to 100 ns) and amplify the small (some µV) and ultra fast (< 100 ps wide) signal produced by the radiation in the diamond detector. The signal amplified by the FCA was then processed through a commercial fast digitizer (NI-5114) 250 Ms/sec, 200 MHz equipped with 64MB ram memory. Both signal amplitude and area can be used to get a PHS spectrum demonstrating the unique performances of the FCA.In the present paper the results obtained at JET are reported as well as the first attempt to get 14 MeV neutron spectrometry using the 14 MeV Frascati Neutron Generator.

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Synthetic single crystal diamond as a fission reactor neutron flux monitor

Cited by 34 publications

References 9 publications

Large-Scale User Facility Imaging and Scattering Techniques to Facilitate Basic Medical Research

Large-Scale User Facility Imaging and Scattering Techniques to Facilitate Basic Medical Research

Influence of the Thin-Film Ag Electrode Deposition Thickness on the Current Characteristics of a CVD Diamond Radiation Detector

Neutron spectroscopy by means of artificial diamond detectors using a remote read out scheme

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