Thermal neutron imaging detectors combining novel composite foil convertors and gaseous electron multipiers

Gaseous Radiation Detectors

“…The calculation assumes full detector efficiency as far as a non-zero residual energy is lost in the active device. For thermal neutrons of two wavelengths, Figure 3.34 gives the calculated triton escape probability, forward, backward and total from 6 Li foils as a function of thickness (Dagendorf et al, 1994).…”

“…For the thinner layer, the peaks correspond to the maximum energy of the prongs, tailing down to smaller values due to the energy loss in the converter; the degradation is more pronounced for the thicker layer. 6 Li converter foils at two neutron wavelengths (Dagendorf et al, 1994). By kind permission of Elsevier.…”

Detectors for time-of-flight fast-neutron radiography 1. Neutron-counting gas detector

“…The first step in neutron detection is the efficient conversion of neutrons into energetic charged particles which can be detected by established methods due to their light or electric charge carrier production. In earlier work we have reported on the development of a thermal neutron imaging methods based on solid foil Gd and 6 Li neutron converters [3][4][5][6]. The method is based on detecting electrons or ions from neutron interactions in a converter foil.…”

Scientific Reviews: Microstrip Gas Chambers (MSGC) for Future Neutron Instrumentation

“…Three square MWPCs were added to the D19 instrument in 2003-2004, close to the MSGC. The four detectors were replaced in June 2005 by a very large area curved MWPC [12]. The MWPC June technique was chosen because there was no solution available with MSGCs for covering a continuous sensitive area of 40 cm × 160 cm.…”