Determination of point wave sources by boundary measurements
This paper is concerned with an inverse point wave sources problem in a bounded domain Ω⊂3 from boundary observations. Assuming that all point sources vanish after a certain time T1, we prove first an identifiability result provided that some condition is satisfied between the time T1, the observation interval (0,T) and the observation domain on the boundary. This condition is reduced to the inequality T>T1 + diam(Ω) when the observation domain is the whole boundary of Ω. In this case, we propose a method to identify completely the sources: their number, locations and intensities.
Bolometers operating at low temperature are discussed as detectors of heavy particles which have been recently considered as constituents of Cosmic Dark Matter. The study of the heat leak in a cascade refrigerator operating underground is suggested for the indirect detection of Weak Interacting Massive Particles.