Resistant and sensitive single-crystal diamond dosimeters for ionizing radiation

Trucchi, Daniele M.; Allegrini, P.; Bellucci, A.; Calvani, P.; Galbiati, A.; Girolami, M.

doi:10.1016/j.nima.2012.10.095

Cited by 36 publications

(18 citation statements)

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“…CVD diamond has been successfully exploited as a material for high energy detection and dosimetry applications with remarkable performances [2][3][4]; nevertheless, the wide band gap of diamond (5.47 eV), makes it transparent in the visible and infrared (IR) wavelength ranges. This work aims at demonstrating the possibility of employing diamond for the fabrication of devices also for visible and IR applications by enhancing the absorption properties of the material by means of a surface laser treatment.…”

Section: Introductionmentioning

confidence: 99%

Optical properties of femtosecond laser-treated diamond

et al. 2014

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A laser-induced periodic surface structure (LIPSS) has been fabricated on polycrystalline diamond by an ultrashort Ti:Sapphire pulsed laser source (k = 800 nm, P = 3 mJ, 100 fs) in a high vacuum chamber (\10 -7 mbar) in order to increase diamond absorption in the visible and infrared wavelength ranges. A horizontally polarized laser beam had been focussed perpendicularly to the diamond surface and diamond target had been moved by an automated X-Y translational stage along the two directions orthogonal to the optical axis. Scanning electron microscopy of samples reveals an LIPSS with a ripple period of about 170 nm, shorter than the laser wavelength. Raman spectra of processed sample do not point out any evident sp 2 content, and diamond peak presents a right shift, indicating a compressive stress. The investigation of optical properties of fs-laser surface textured diamond is reported. Spectral photometry in the range 200/2,000 nm wavelength shows a significant increase of visible and infrared absorption (more than 80 %) compared to untreated specimens (less than 40 %). The analysis of optical characterization data highlights a close relationship between fabricated LIPSS and absorption properties, confirming the optical effectiveness of such a treatment as a light-trapping structure for diamond: these properties, reported for the first time, open the path for new applications of CVD diamond.

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Section: Introductionmentioning

confidence: 99%

Optical properties of femtosecond laser-treated diamond

et al. 2014

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“…The optical fibre sensor also allows for greater spatial resolution compared with recent diamond sensors (size 0.47 cm x 0.47 cm x 0.05 cm) such as that proposed by Trucchi et al, [36]. It can be seen that there is a need for a low cost sensor with is easy to manufacture.…”

Section: Diamond Dosimetrymentioning

confidence: 99%

Optical fibre X-ray radiation dosimeter sensor for low dose applications

McCarthy

O'Keeffe

Lewis

et al. 2011

2011 IEEE SENSORS Proceedings

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iIn this thesis, the development of a novel fibre optic sensor for measuring X-ray radiation in radiotherapy is investigated. The proposed sensor is based on utilising PMMA optical fibres which are coated with an X-ray sensitive scintillating phosphor material which fluoresces when subjected to ionisation X-ray radiation. A literature review of the current methods of radiation detection in radiotherapy applications is presented and a number of shortfalls which were identified are addressed by providing a low cost, real time sensor as a solution for measuring radiation in radiotherapy applications. Declarationii

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“…Design and realization of the 12-pixel SDD matrix A 12 pixel matrix was designed as neutron spectrometer and built at the CNR-ISM institute in Rome (Italy) [6][7][8][9]. Each pixel is made of a single-crystal diamond sample (4.5 x 4.5 mm 2 , 500 µm thick, with a boron concentration [B] < 5 ppb and nitrogen concentration [N] < 1 ppb), provided by Element Six Ltd [10].…”

Section: 1mentioning

confidence: 99%

“…The latter reaction 12 C(n,α) 9 Be is the selected one for 14 MeV neutron spectroscopy measurements from a Deuterium-Tritium (DT) plasma [2]. In this case, in fact, the resulting deposited energy in the detector corresponds to the incoming neutron energy minus the reaction Q-value.…”

Section: Introductionmentioning

confidence: 99%

“…Neutron detection in SDD is based on the collection of electron-hole pairs produced by charged particles generated by neutron interaction with 12 C nuclei. For neutron energies above about 7 MeV neutron spectroscopy is possible by measuring the deposited energy into the detector via the reaction 12 C(n,α) 9 Be. This is indeed the cases of SDD measurements of 14 MeV neutrons of DT plasmas.…”

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confidence: 99%

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A New Single-Crystal Diamond Detector Matrix For Neutron Spectroscopy Of Dt Plasmas

Tardocchi¹

2016

Proceedings of 1st EPS Conference on Plasma Diagnostics — PoS(ECPD2015)

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Single-crystal Diamond Detectors (SDDs) feature high radiation hardness, fast response and compact size. This makes SDDs ideal candidates for fast neutron detectors in environment where high neutron flux is an issue such as the next generation burning plasmas experiments. Neutron detection in SDD is based on the collection of electron-hole pairs produced by charged particles generated by neutron interaction with 12 C nuclei. For neutron energies above about 7 MeV neutron spectroscopy is possible by measuring the deposited energy into the detector via the reaction 12 C(n,α) 9 Be. This is indeed the cases of SDD measurements of 14 MeV neutrons of DT plasmas. A single pixel SDD (4.5x4.5x0.5 mm^3) prototype was installed at JET in 2013 and the achieved results allowed to assess also the neutron spectroscopic capability of deuterium plasmas. A 12-pixels SDD matrix has been recently realized and will be installed in 2015 at JET for DT plasmas as part of the Vertical Neutron Spectrometer project.In this paper calibration of the SDD matrix with alpha particles in the laboratory and 14 MeV neutrons performed at the ENEA Frascati Neutron Generator will be presented. These calibrations have been performed with a fast charge preamplifier combined to a fast digital data acquisition, which allows for neutron spectroscopy measurements with simultaneously high energy resolution and high count rate capability. Both requirements are essential for neutron spectroscopy of high power fusion plasmas. The calibrations results achieved extrapolate favourably in view of future neutron spectroscopy measurements at JET using diamond detectors.

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Resistant and sensitive single-crystal diamond dosimeters for ionizing radiation

Cited by 36 publications

References 4 publications

Optical properties of femtosecond laser-treated diamond

Optical properties of femtosecond laser-treated diamond

Optical fibre X-ray radiation dosimeter sensor for low dose applications

A New Single-Crystal Diamond Detector Matrix For Neutron Spectroscopy Of Dt Plasmas

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