Radiation hardness of a polycrystalline chemical-vapor-deposited diamond detector irradiated with 14 MeV neutrons

Chemical-vapor-deposited (CVD) diamond films are considered as neutron detectors for nuclear fusion devices because of their radiation hardness. Data about the radiation hardness of polycrystalline CVD diamond films exposed to 14 MeV neutron are missing in literature so the actual capability of CVD diamond detectors to withstand fusion device conditions must be truly demonstrated. In this work a polycrystalline CVD diamond detector, 101μm thick, was irradiated for the first time with 14 MeV neutrons produced by the Fusion Neutron Source of the Japan Atomic Energy Research Institute with the goal to study its radiation hardness. The 14 MeV neutron fluence was 8×1014n∕cm2. The film performances were studied before and after the 14 MeV neutron irradiation by using 5.5 MeV α from Am241 source, both in the pumped and the “as-grown” state. A comparison with previous measurements performed in more soft neutron spectra (mean neutron energy of 1–2 MeV) is reported pointing out the more damaging effects of the 14 M...

[1]  H. Kagan.  Diamond radiation detectors may be forever , 2005 .

[2]  M. Marinelli,et al.  Synthesis and characterization of a single-crystal chemical-vapor-deposition diamond particle detector , 2005 .

[3]  M. Marinelli,et al.  Extreme ultraviolet single-crystal diamond detectors by chemical vapor deposition , 2005 .

[4]  T. Nishitani,et al.  Response function measurement of layered type CVD single crystal diamond radiation detectors for 14 MeV neutrons , 2004 .

[5]  M. Marinelli,et al.  Development and application of CVD diamond detectors to 14 MeV neutron flux monitoring. , 2004, Radiation protection dosimetry.

[6]  Jeffrey A. Koch,et al.  A neutron sensor based on single crystal CVD diamond , 2004 .

[7]  Angelo Piermattei,et al.  Photon and electron beam dosimetry with a CVD diamond detector , 2004 .

[8]  Jeffrey A. Koch,et al.  CVD diamond as a high bandwidth neutron detector for inertial confinement fusion diagnostics , 2003 .

[9]  R. Kass,et al.  Status of the R&D activity on diamond particle detectors , 2002 .

[10]  J. Molnár,et al.  Improvement of the dosimetric properties of chemical-vapor-deposited diamond films by neutron irradiation , 2002 .

[11]  M. Marinelli,et al.  Systematic study of pre-irradiation effects in high efficiency CVD diamond nuclear particle detectors , 2002 .

[12]  M. Marinelli,et al.  Trapping and detrapping effects in high-quality chemical-vapor-deposition diamond films: Pulse shape analysis of diamond particle detectors , 2001 .

[13]  R. Aymar,et al.  Overview of ITER-FEAT - The future international burning plasma experiment , 2001 .

[14]  D. Tromson,et al.  CVD diamond gamma dose rate monitor for harsh environment , 2001 .

[15]  A. Mainwood,et al.  Recent developments of diamond detectors for particles and UV radiation , 2000 .

[16]  R. Tapper,et al.  Diamond detectors in particle physics , 2000 .

[17]  Yujiro Ikeda,et al.  High-temperature operation of a radiation detector made of a type IIa diamond single crystal synthesized by a HP/HT method , 2000 .

[18]  M. Marinelli,et al.  High-quality diamond grown by chemical-vapor deposition: Improved collection efficiency in α-particle detection , 1999 .

[19]  R. Kass,et al.  Review of the development of diamond radiation sensors , 1999 .

[20]  R. Meilunas,et al.  Response of CVD diamond detectors to alpha radiation , 1997 .

[21]  J. Conway,et al.  Neutron irradiation of CVD diamond samples for tracking detectors , 1997 .

[22]  J. Hassard,et al.  Neutron damage of CVD diamond , 1997 .

[23]  Mario Pillon,et al.  14 MeV neutron spectra measurements with 4% energy resolution using a type IIa diamond detector , 1995 .

[24]  J. Hassard,et al.  Neutron damage of chemical vapour deposition diamond , 1995 .

[25]  Mark T. Robinson,et al.  Basic physics of radiation damage production , 1994 .

[26]  Andrew Holmes-Siedle,et al.  Handbook of Radiation Effects , 1993 .

[27]  Don M. Parkin,et al.  Displacement threshold energy for type IIa diamond , 1992 .

[28]  J Walker,et al.  Optical absorption and luminescence in diamond , 1979 .

[29]  K. Hecht.  Zum Mechanismus des lichtelektrischen Primärstromes in isolierenden Kristallen , 1932 .

[30]  G. Pucella,et al.  Time dependent 14 MeV neutrons measurement using a polycrystalline chemical vapor deposited diamond detector at the JET tokamak , 2005 .