Abstract:… systems. There are three types of wicks that can carry this power over the distance; grooved, sintered arterial and self-venting arterial. Arterial heat pipes are the default design for spacecraft nuclear reactors; however, de-priming of the artery due to radiation… more
Abstract:… single-shot X-band UED device will have improved bunch length and beam brightness while reducing the size and capital cost of the system. Such an affordable, compact RF gun could be used to drive laser wakefield accelerators, non-recirculating coherent synchrotron radiation… more
Abstract:… this point the use of high-QE photocathodes for the coming generation of high-brightness, high-current electron injectors seems to be a technological imperative. Therefore, the challenge before us is the development of new high-QE photocathodes that are hardened against… more
Abstract:… the brain, by both arterial spin labeling (ASL) which traces the passage of blood into the brain and by dynamic susceptibility contrast (DSC) perfusion measurements which rely on the i.v. injection of a small amount of tracer material without involving radiation. The… more
Abstract:… data structures. By comparison, long duration space-based missions operate in harsh radiation environments, where maintenance is not an option, yet transient and permanent failures can and do happen. Historically, this has been dealt with by expensive radiation-hardened… more
Abstract:… eye damage. Future threats may include frequency agile lasers. It is critical that countermeasure systems provide laser eye protection (LEP) across the visible and IR waveband. Self-activating (passive) devices where protection is activated by the incoming radiation (optical… more
Abstract:…he edge of the shear layer and extending to 20 diameters downstream of the nozzle exit. A mobile scissors jack will aid positioning. Data will be processed and analyzed using techniques derived from prior work to elucidate the large scale structure and estimate the noise … more
Abstract:Atmospheric nucleation processes produce large numbers of particles. Once formed, these particles grow rapidly and may alter the formation and lifetime of clouds, and thereby influence the earths radiation balance. Rapid growth of newly formed particles has been observed in many… more
Abstract:… University will develop a biologically-inspired integrated sensor that can detect the UV, visible (VIS), near infrared (NIR), and mid-wave infrared (MWIR) bands. This sensor will be integrated with plasmonic filters to provide additional information from the radiation… more
Abstract:… essential areas intact. Current imaging techniques include magnetic resonance imaging (MRI), computed tomography (CT), x-ray fluoroscopy, and ultrasound. Their wide use is inhibited by the size, cost, and significant image acquisition time of MRI, the ionizing radiation… more
Abstract:…an order of magnitude improvement in the ability to inventory fissile materials in domestic fuel cycle systems is required. The goal of the proposed effort is to develop a detector based on a new scintillating material capable of detecting gamma and neutron radiations… more
Abstract:Nuclear power is an important part of the Nations energy security providing 20 percent of U.S. electricity generation without the emission of gases associated with global climate change and air pollution. The DOE would like to improve and optimize the performance of nuclear power plants by improving… more
Abstract:Dry storage systems are designed to safely confine the used nuclear fuel by providing radiation shielding, heat dissipation and protection of fuel assemblies from outside elements. To avoid dry storage system breach due to material deterioration or other factors, sensors can be… more
Abstract:The proliferation of weapons of mass destruction such as nuclear missiles and dirty bombs is a serious threat in the world today. Fast-neutron detectors are an important tool in monitoring the proliferation of nuclear weapons. Discrimination between fast neutrons and gamma rays is typically… more
Abstract:While substantial advancements have been made in realizing tube based large area detectors such as the Large Area Picosecond Photo-Detector (LAPPD), there is widespread agreement in the cathode community that a higher QE bialkali cathode is possible, and that the present understanding is largely… more
Abstract:…densities. Toward this end we intend to undertake the development of novel optical coatings that will simultaneously provide the necessary protection and maintain the optical performance of coated components to the desired levels. The significant expertise of Radiation… more
Abstract:The goal of this program is to develop a process for producing ceramic materials with properties approaching or, possibly in some aspects, exceeding those of single crystals. Ceramic processing provides important benefits including lower cost, higher yield, relaxed constraints on size and shape,… more
Abstract:In the event of an intentional or accidental release of ionizing radiation, it will be critical to have rapid triage assessment tools to evaluate the health of mission-critical personnel and to make effective use of available medical and emergency resources. However, assessment… more
Abstract:… such as oil- or coal-based electricity, solar energy must be captured and converted cost-effectively. Novel photovoltaic materials and their innovative manufacturing will reduce the net costs of solar energy production and increase energy productivity. Radiation Monitoring… more
Abstract:An important type of water pipe is the Prestressed Concrete Cylinder Pipe (PCCP). There are thousands of miles of PCCP installed in the US in sections with length up to 20 feet and diameter for 2 to 14 feet. The large size of the pipes, the thickness of the concrete (up to 10 inches) and the… more
Abstract:The proliferation of weapons of mass destruction (WMD) is a serious threat. Preventing the spread of these nuclear weapons has reached a state of heightened urgency in recent years. Neutron detection is an important component of the overall detection techniques used in identifying WMDs.… more
Abstract:… of the signal waveforms not necessary of other types of materials, and this program solves this by implementing an adaptable framework from which to develop new instruments. The unit developed in this Phase-II program can implemented for nuclear material security, … more
Abstract:…is of high-quality material in hours and allows creation of unconventional compositions. Resulting sensors will be coupled to photodetectors to realize high-efficiency thermal neutron detectors with high gamma/neutron discrimination for effective operation in mixed radiation… more
Abstract:…, a WBG compound semiconductor with aluminum concentration of 60% to 90%. The ~2-eV band-gap energy of this material is engineered to match the emission spectrum of both CLYC and CeBr3. The high band-gap of AlGaAs also provides much lower dark noise and better radiation… more
Abstract:To address issues of sub-optimal performance of current X-ray CT scanners used by the first re-sponding providers to expedite diagnosis and triage, we are developing a novel scintillator that offers a unique promise to achieve high-sensitivity, high-resolution X-ray imaging through its integration… more
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