Collider aspects of flavour physics at high Q

This review presents flavour related issues in the production and decays of heavy states at LHC, both from the experimental side and from the theoretical side. We review top quark physics and discuss flavour aspects of several extensions of the Standard Model, such as supersymmetry, little Higgs model or models with extra dimensions. This includes discovery aspects as well as measurement of several properties of these heavy states. We also present public available computational tools related to this topic.Comment: Report of Working Group 1 of the CERN Workshop ``Flavour in the era of the LHC'', Geneva, Switzerland, November 2005 -- March 200

Piezoelectrically actuated ejector using PMN-PT single crystal

A piezoelectric fluid ejector has been fabricated using a Pb(Mg1/3Nb2/3)O3–0.35PbTiO3 (PMN–PT) single crystal ring. The design of the ejector is based on resonant modes of a flextensional transducer that is constructed by bonding a PMN–PT ring to a thin circular metal membrane with a small orifice at the centre. The fluid is placed, at atmospheric pressure, behind one face of the membrane. By applying an appropriate voltage to the PMN–PT ring, a continuous or drop-on-demand ejection of ink or water can be achieved. With the PMN–PT single crystal as the driving element, the ejector has a very high axial displacement and can be driven at a low voltage. The performance of the PMN–PT single crystal ejector has been compared with the ejector fabricated using PZT ceramics and is formed to have better performance

Properties of PMN-PT fibres fabricated using powder of PMN-PT single crystals

Lead magnesium niobate–lead titanate (PMN–PT) ceramic fibres with the nominal composition of 0.65Pb(Mg1/3Nb2/3)O3–0.35PbTiO3 were synthesised using PMN–PT single crystal powder and poly(acrylic acid). The fibres were extruded directly by pressing the mixture through a spinneret. The fibres were well crystallised after sintering at 1250 °C and the final diameter was around 300 μm. The microstructural properties of the fibres were investigated using scanning electron microscopy (SEM) and X-ray diffraction (XRD). The electrical characteristics of the fibre were determined by measuring the hysteresis D–E loop, relative permittivity and impedance spectrum. The measured results showed that this method can be used to fabricate PMN–PT fibres with good performance

Scanning Electron Acoustic Microscopy: A Novel Tool for Failure Analysis & Microcharacterisation

Conference Proceedings from the International Symposium for Testing and Failure Analysis11-1

Scanning Electron Acoustic Microscopy: A Novel Tool for Failure Analysis & Microcharacterisation

Conference Proceedings from the International Symposium for Testing and Failure Analysis11-1

Study of the Poling of 0.65PMN-0.35PT Single Crystals and Their Application in Cymbal Actuators

Abstract not available

Ferroelectric lead magnesium niobate-lead titanate single crystals for ultrasonic hydrophone applications

Ferroelectric lead magnesium niobate–lead titanate (PMN–PT) single crystals with a composition around the rhombohedral–tetragonal morphotropic phase boundary (65 mol% of PMN) were used to fabricate single-element needle-type hydrophones for measuring the spatial and temporal characteristics of medical ultrasonic transducers. PMN–PT single crystal was grown by a modified Bridgman method. Discs (0.5 mm thick) with normal along the 〈0 0 1〉 direction were cut and then poled by a dc field in the thickness direction. The single crystal has a high relative permittivity (εr∼4000) making it appropriate for small area hydrophone applications. Single-element needle-type hydrophones with this material as the sensing element have been fabricated and characterized. The hydrophones have flat frequency response and good receiving sensitivity over certain frequency range in the megahertz region

Piezoelectric PMN-PT fibre hydrophone for ultrasonic transducer calibration

A newly developed ceramic fibre hydrophone with an active element as small as 0.25 mm in diameter is described in this work. Lead magnesium niobate-lead titanate (PMN-PT) ceramic fibre with a nominal composition of 0.65Pb(Mg1/3Nb2/3)O3-0.35PbTiO3 was fabricated by an extrusion method. PMN-PT single crystals were ground to a powder form and then mixed with poly(acrylic) acid to form a homogenous slurry. The fibre was extruded by pressing the slurry through a spinneret and then sintering at 1250 °C for crystallization. The electrical characteristics of the PMN-PT fibre were evaluated by measuring the relative permittivity and the impedance spectrum. A piezoelectric PMN-PT fibre hydrophone was fabricated and its sensitivity, angular response, and spatial resolution were evaluated. The fibre hydrophone provides good spatial resolution, angular response and receiving sensitivity