Award Data

Compact laser systems are needed to interrogate possible sites of nuclear proliferation that, for strategic or political reasons, cannot be sampled and inspected directly. This laser system would be used with a nonlinear optical wavelength converter for remote spectroscopic analysis of effluents from suspected sites. This project will develop an advanced laser system that will be compact, lightw ...

Improved measurements and understanding of cirrus clouds is essential for the accurate modeling of climate change and, in particular, for feedback effects that respond (positively or negatively) to greenhouse-gas global warming. Unfortunately, the reliable autonomous detection of sub-visual cirrus clouds is limited by the poor signal-to-noise ratio of existing micropulse lidars. Backscatter lida ...

A high-quantum-efficiency long-lifetime photocathode is a key component for the synchronous photoinjection of GaAs photoemission guns, used in modern particle accelerators. High-power pulsed-laser sources, with picosecond pulse durations at GHz repetition rates, are needed to provide enough power to enable this application; yet, none are commercially available. This project will develop a highly ...

The successful execution of the current high-capacity optical-networking environment, which supports supercomputing centers at the DOE national laboratories, requires adpative and finer-grained management/set-up of necessary bandwidth and low-delay paths between distributed applications. Whereas manual management techniques have been implemented in test beds and moderate-capacity networks, the ap ...

In order to increase proton energy up to 8 GeV in a driver linear accelerator, particles must be accelerated through various stages and three different power levels (25kW, 100 kW, and 210kw). Unfortunately, no power coupler element for these cavities has ever been produced using U.S. industrial capabilities. This project will develop innovative modular, multiple power level, 325 MHz spoke caviti ...

There are increasing demands to use high-beam-current, high-radio-frequency (RF) power, S-band cavities in existing and newly planned accelerator projects, in order to produce a very brilliant, broadband, coherent teraherz synchrotron radiation source (or for other purposes). For optimum performance, a critical technical challenge is to replace the present low-gap-voltage RF cavity with a very hi ...

The superconducting radio-frequency cavities being tested for use in the International Linear Collider are made from high purity niobium sheet metal, which has an inherent, performance-hindering "damaged layer." This surface layer is removed by acid treatments, which result in hydrogen contamination and necessitate high-temperature, vacuum heat treatments. This project will develop technology bo ...

Networking and security technology have become inextricably linked as enterprises rely on computer networks for everyday operations. It is imperative to integrate several types of security technologies into the network to foil various kinds of attacks before they can do any damage. Generalized Multiple Protocol Label Switching (GMPLS) has extended Multi-Protocol Label Switching to provide the co ...

Generation-IV reactor plants have the potential to drastically reduce our dependence on foreign oil and to reduce emission of greenhouse gasses. These plants will require reliable, high-temperature physical sensors that can operate at temperatures of 800°C to 1000°C and pressures up to 1000psi, while undergoing heavy irradiation. Conventional temperature and pressure sensors in nuclear and non ...

Improved neutron dosimetry is needed to assure the safety of nuclear power plants. However, real-time spectrometers for measuring neutron dose at specific energy levels do not exist. Instead, the current state of the art relies on some type of installed neutron absorber, which must be physically removed and analyzed to obtain the energy-level specific dose. The removal process typically require ...