E2v Technologies | Date: 2013-07-29
E2v Technologies | Date: 2013-09-13
A magnetron cathode comprises electron emissive material included in a cathode body and a support structure for supporting the cathode body. The support structure has a longitudinal axis and includes a first part having a first cylinder integrally formed with a first end hat and a second part having a second cylinder integrally formed with a second end hat. The first cylinder and the second cylinder have an overlapping region in the longitudinal axial direction and are joined together. The cathode body is located around the first cylinder of the first part of the support structure and is joined to the first cylinder by a brazed joint. The outer surface of the first cylinder is grooved at the brazed joint.
Agency: GTR | Branch: EPSRC | Program: | Phase: Research Grant | Award Amount: 438.49K | Year: 2015
The isolation of single-atomic layer graphene has led to a surge of interest in other layered crystals with strong in-plane bonds and weak, van der Waals-like, interlayer coupling. A variety of two-dimensional (2D) crystals have been investigated, including large band gap insulators and semiconductors with smaller band gaps such as transition metal dichalcogenides. Interest in these systems is motivated partly by the need to combine them with graphene to create field effect transistors with high on-off switching ratios. More importantly, heterostructures made by stacking different 2D crystals on top of each other provide a platform for creating new artificial crystals with potential for discoveries and applications. The possibility of making van der Waals heterostructures has been demonstrated experimentally only for a few 2D crystals. However, some of the currently available 2D layers are unstable under ambient conditions, and those that are stable offer only limited functionalities, i.e. low carrier mobility, weak optical emission/absorption, band gaps that cannot be tuned, etc. In a recent series of pilot experiments, we have demonstrated that nanoflakes of the III-VI layer compound, InSe, with thickness between 5 and 20 nanometers, have a thickness-tuneable direct energy gap and a sufficiently high chemical stability to allow us to combine them with graphene and related layer compounds to make heterostructures with novel electrical and optical properties. The main goal of this project is to develop graphene-hybrid heterostructures based on this novel class of two-dimensional (2D) III-VI van der Waals crystals. This group of semiconductors will enrich the current library of 2D crystals by overcoming limitations of currently available 2D layers and by offering a versatile range of electronic and optical properties. From the growth and fabrication of new systems to the demonstration of prototype devices, including vertical tunnel transistors and optical-enhanced-microcavity LEDs, our project will provide a platform for scientific investigations and will contribute to the technology push required to create new routes to device miniaturization, fast-electronics, sensing and photonics. There is great potential for further growth of all these sectors as the fabrication of 2D systems improves and as new properties are discovered and implemented in functional devices.
Agency: GTR | Branch: Innovate UK | Program: | Phase: Collaborative Research & Development | Award Amount: 164.02K | Year: 2015
Following the Nobel Prize winning discovery that lasers can cool atoms to extremely low temperatures, where they can occupy a single quantum state, there has been a lot of research into potential applications. Laboratory experiments with cold atoms have shown a 1000 times improvement in inertial navigation accuracy and a 1000 times improvement in timing over conventional atomic clocks. For these breakthroughs to be exploited in real applications the laboratory experiments must be developed into practical devices that could be operated in a satellite, aircraft, ship or hospital The aim of the FreezeRay project is to develop a commercial “all-in-one” system for cooling atoms. This will be the core engine of a cold atom system and will consist of a compact sealed vacuum chamber and a highly stable laser source that will cool the atoms. The technical approach will draw on component technology such as lasers and amplifiers that have been developed for optical communications and are highly reliable with operating lifetime exceeding 25 years in harsh environments.
E2v Technologies | Date: 2015-03-12
A CMOS image sensor