Proton recoil telescope based on diamond detectors for measurement of fusion neutrons

Conference · Wed Jul 01 04:00:00 EDT 2015

OSTI ID:22531322

Caiffi, Barbara; Taiuti, Mauro ^[1]; Osipenko, Mikhail; Ripani, Marco ^[2]; Pillon, Mario ^[3]

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1. Universita di Genova, Genoa, 16146 (Italy)
2. Istituto Nazionale di Fisica Nucleare, Genoa, 16146 (Italy)
3. ENEA, Frascati, 00044 (Italy)

Diamonds are very promising candidates for the neutron diagnostics in harsh environments such as fusion reactor. In the first place this is because of their radiation hardness, exceeding that of Silicon by an order of magnitude. Also, in comparison to the standard on-line neutron diagnostics (fission chambers, silicon based detectors, scintillators), diamonds are less sensitive to γ rays, which represent a huge background in fusion devices. Finally, their low leakage current at high temperature suppresses the detector intrinsic noise. In this talk a CVD diamond based detector has been proposed for the measurement of the 14 MeV neutrons from D-T fusion reaction. The detector was arranged in a proton recoil telescope configuration, featuring a plastic converter in front of the sensitive volume in order to induce the (n,p) reaction. The segmentation of the sensitive volume, achieved by using two crystals, allowed to perform measurements in coincidence, which suppressed the neutron elastic scattering background. A preliminary prototype was assembled and tested at FNG (Frascati Neutron Generator, ENEA), showing promising results regarding efficiency and energy resolution. (authors)

• Research Organization: Institute of Electrical and Electronics Engineers - IEEE, 3 Park Avenue, 17th Floor, New York, N.Y. 10016-5997 (United States)
• OSTI ID: 22531322
• Report Number(s): ANIMMA--2015-IO-274
• Country of Publication: United States
• Language: English

Related Subjects

46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
70 PLASMA PHYSICS AND FUSION TECHNOLOGY
CHEMICAL VAPOR DEPOSITION
COINCIDENCE METHODS
COMPARATIVE EVALUATIONS
DIAMONDS
EFFICIENCY
ELASTIC SCATTERING
ENERGY RESOLUTION
FISSION CHAMBERS
LEAKAGE CURRENT
NEUTRON DETECTION
NEUTRON DETECTORS
NEUTRON GENERATORS
NEUTRONS
PHOSPHORS
PROTONS
RECOILS
SILICON
TELESCOPE COUNTERS
THERMONUCLEAR REACTIONS