Abstract:
A Geiger-Mueller charge particle rate measurement system includes a clock management unit in combination with multiple oscillators and rate feedback controller to allow for reactive switching between the different oscillator frequencies to optimize system use. Controlling the clock management unit to send the appropriate frequency (clock signal) to the timers in response to measured rate date from the rate feedback controller facilitates operation at different clock speeds, which helps reduce power consumption when operated at lower speeds.
Abstract:
A stacked luminescent solar concentrator includes two separate absorption/emission cells, each having a layer of luminophore-type material, wherein a top layer is a high band gap layer comprised of quantum dots in polymer, wherein the quantum dots are engineered so as to absorb a significant percentage of photons above bandgap. The bottom layer is a lower band gap layer comprised of quantum dots in polymer, wherein the quantum dots in the second layer are engineered so as to absorb photons not absorbed in the top layer, thus increasing total percentage of absorbed photons. Photovoltaic cells are located below the layers at the bottom of the cells or at the edges of the cells. The sides and lower surfaces of the cells may include reflective surfaces as discussed further herein. Reflection losses from the top surface thereof may be minimized using a broadband anti-reflective coating (AR) on the surface.
Abstract:
A system and associated method for isolating intended radiation signals for determining target characteristics includes multiple detectors for detecting radiation signals having varying energies, delay modules for delaying the detected radiation signals and a discriminator associated with the multiple detectors for determining if detected radiation signals include unintended radiation signals, e.g., x-rays, and provided blanking signals to a switch in order to effectively remove the unintended radiation signals from the data that is presented to the processor for determining target characteristics.