Page 12 - Demo

Figure 5: Coherent amplification network (CAN) makes the laser efficiency and repetition rate of the pulses as high as those of the fiber laser. Even though the individual fiber cannot carry a large power, the network of fibers coherently assembled here can achieve arbitrarily high power, as it is linearly proportional to the number of fibers that are cohered. These combined features are the ones we exploit for the purpose of this large tank monitoring in which large number of photons are necessary, while precise (sometimes digital) monitoring is needed. After [35].
The system presented above is a 3 mJ laser system with average ion energy of 100 keV and our goal is 200 kW or 1017 n/s neutron source (medium multiplication keff=0.98). Let us assume that we can accelerate all deuterons within the volume of interaction (with laser radius at focal point 3.6 m) of the laser with the nanometric foil. Therefore, the number of deuterons accelerated is ND=3x1010 and taking a 100 kHz rep rate gives 3x1015 D/s. For 1% efficiency of conversion from deuterium to neutron the required input power ~100s kW. If a single fiber cannot output 3 mJ at 35 fs then a CAN laser may be used to coherently interfere fibers to attain the 3 mJ output energy.
IV. Monitoring and control
A solid characterization is done by classical techniques using X-ray diffraction among others. A substance in a molten state is much harder to characterize due to its structure lacking coherent definition and the molten substance continuous movement. Molten salts solidify below