Neutrino Radar

We point out that with improving our present knowledge of experimental neutrino physics it will be possible to locate nuclear powered vehicles like submarines, aircraft carriers and UFOs and detect nuclear testing. Since neutrinos cannot be shielded, it will not be possible to escape these detection. In these detectors it will also be possible to perform neutrino oscillation experiments during any nuclear testing. The difficulty of detecting neutrinos did not allow us to understand the properties of neutrinos for a long time. Only recently the atmospheric neutrino data has established neutrino oscillations in the atmospheric neutrino [1]. Recent results from SNO [2], alongwith the other solar neutrino experiments [3], have then established neutrino oscillations in solar neutrinos. The neutrinoless double beta decay has also been observed [4]. All these results have narrowed down the possible neutrino mass matrices for a 3-generation scenario [5]. The mass squared differences between different generations of neutrinos are very small and it is now realised that detecting reactor neutrinos at a distance in long baseline experiments can probe these small mass squared differences. This interest have now enriched the detector technology to detect neutrinos from reactors at a large distance. The CHOOZ [6] and palo Verde [7] reactor neutrinos have been detected at a distance of ∼ 1 km. In the longbaseline experiments and Kamland neutrinos will be detected at a distance of about 200-300 kms. Detecting neutrinos from reactors at a distance of about 200 kms, Kamland will soon tell us if LMA is teh solution for solar neutrino problem. In this article we point out that with some more improvement of our present knowledge of the neutrino detectors, it will be possible to think of some practical applications of neutrino detectors as neutrino radar. All the technology being developed could be used to develop neutrino radars, which will have future defense applications. So, developing new neutrino detectors will not only serve the purpose of precision measurements with neutrinos, but they will help us construct better defense radars. The main idea behind the neutrino radars is that all nuclear reactors emit neutrinos in all directions and they cannot be shielded. With proper detectors these neutrinos could be detected at a distance. Another observation is that the water Cherenkov detectors can also tell us the direction of the