Production and measurement of neutron reference fields : the AMANDE facility and MIMAC prototype as neutron detection system

Details Production and measurement of neutron reference fields : the AMANDE facility and MIMAC prototype as neutron detection system Production and measurement of neutron reference fields : the AMANDE facility and MIMAC prototype as neutron detection system

Feb 2012

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2012eas....53..173g&link_type=abstract

EAS Publications Series, Volume 53, 2012, pp.173-181

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Scientific paper

The AMANDE facility produces mono-energetic neutron fields from 2 keV to 20 MeV with a metrological quality (Gressier et al. 2004). To be considered as a standard facility, fluence and energy distributions of neutron fields have to be mastered, i.e. measured by primary detector standards. For this purpose, a new gaseous Time Projection Chamber (μTPC) is being developed within the MIMAC project devoted to directional Dark Matter search (Billard et al. 2010). The μTPC is dedicated to measure neutron fields from 2 keV up to 1 MeV. The measurement strategy requires track reconstruction of recoiling nuclei down to a few keV, which can be achieved with low pressure gaseous detectors. Hence the energy must be measured precisely and the track of the recoiling nucleus must be 3D reconstructed. This is achieved with a low pressure micropattern gaseous detector (a pixelized bulk micromegas) equipped with a self triggered electronics able to perform the anode sampling at a 50 MHz frequency. Methods to measure fluence and neutron energy with the TPC have been described.

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