A5044491712- Particle Accelerators and Free-Electron Lasers
- Particle accelerators and beam dynamics
- Gyrotron and Vacuum Electronics Research
- Superconducting Materials and Applications
- Magnetic confinement fusion research
- Particle Detector Development and Performance
- Nuclear Physics and Applications
- Advanced X-ray Imaging Techniques
- Embedded Systems Design Techniques
- Photocathodes and Microchannel Plates
- Semiconductor materials and devices
- Advanced Data Compression Techniques
- Video Coding and Compression Technologies
- Advancements in Semiconductor Devices and Circuit Design
- Electrostatic Discharge in Electronics
- Plasma Diagnostics and Applications
- Interconnection Networks and Systems
- Semiconductor Lasers and Optical Devices
- Photonic and Optical Devices
- Advanced Optical Sensing Technologies
- Low-power high-performance VLSI design
- Optical Network Technologies
- 3D IC and TSV technologies
- Thin-Film Transistor Technologies
- Spacecraft and Cryogenic Technologies
Trinity College Dublin
2024
MAX IV Laboratory
2014-2020
Lund University
2020
European Spallation Source
2012-2019
Royal Holloway University of London
2009-2012
University of Liverpool
2012
Liverpool Women's Hospital
2012
Qualcomm (United Kingdom)
2005-2011
Rensselaer Polytechnic Institute
2009-2010
Stanford University
2007-2009
Coherent Smith-Purcell (SP) radiation originating from three different gratings has been measured at End Station A, SLAC, and used to reconstruct the time profile of electron bunches. The beam energy during these experiments was 28.5 GeV ($\ensuremath{\gamma}\ensuremath{\cong}55\text{ }773$) number electrons in bunch $0.9--1.4\ifmmode\times\else\texttimes\fi{}{10}^{10}$. spectral distribution radiated by means an array 11 pyroelectric detectors. Typical values FWHM length are about 2.5 ps,...
The Accelerator Test Facility 2 (ATF2) is a scaled demonstrator system for final focus beam lines of linear high energy colliders. This paper describes the resolution cavity position monitor (BPM) system, which part ATF2 diagnostics. Two types BPMs are used, C-band operating at 6.423 GHz, and S-band 2.888 GHz with an increased aperture. cavities, electronics, digital processing described. attenuators was determined to be approximately 250 nm 1 m system. Without attenuation best recorded 27 nm.
Experiments at the FLASH facility DESY have demonstrated that higher order modes induced in superconducting cavities can be used to provide a variety of beam and cavity diagnostics. The axes determined from orbit produces minimum power dipole HOM modes. phase amplitude obtain high resolution position information, monopole measure relative accelerator rf. For most accelerators, existing mode couplers necessary signals, downmix digitizing electronics are straightforward, similar those for...
ATF2 is a final-focus test beam line which aims to focus the low emittance from ATF damping ring vertical size of about 37 nm and demonstrate nanometer level stability. Several advanced diagnostics feedback tools are used. In December 2008, construction installation were completed commissioning started, supported by an international team Asian, European, U.S. scientists. The present status first results described.
We report a new super self-aligned graded SiGe base transistor that uses high energy implantation, rather than epitaxial growth, to form the sub-collector region. This inexpensive process yields device with f/sub T/ of 52 GHz and max/ 70 addition only 4 lithography levels over our 0.25 /spl mu/m CMOS technology without any changes existing steps. Also, we demonstrate 4:1 multiplexer 1:4 demultiplexer circuits using this show excellent performance at 10 Gbit/s.
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The beam delivery system for the linear collider focuses beams to nanometer sizes at its interaction point, collimates halo provide acceptable background in detector and has a provision state-of-the art instrumentation order reach ILC's physics goals. This paper describes design details status of baseline configuration considered reference also lists alternatives.
We report preliminary results of beam tests the FONT3 Linear Collider intra-train position feedback system prototype at Accelerator Test Facility KEK. The incorporates a novel monitor (BPM) processor with latency below 5 nanoseconds, and kicker driver amplifier similar low latency. 56 nanosecond-long bunchtrain in ATF extraction line was used to test BPM processor. achieved will allow demonstration on timescales relevant even for CLIC design.
In the past ten years, we have witnessed rapid advances in communication technology that enabled more than an order magnitude increase throughput and reduction power consumption. The steep rise available has stimulated growth of ubiquitous broadband services such as streaming high-definition video contents, while on other extreme, drop consumption, particular for short-range radio technologies, personal area connectivity all kinds portable consumer electronic devices, headsets, cell phones,...
The European Spallation Source (ESS) is a neutron science facility funded by collaboration of 17 countries currently under design and construction in Lund, Sweden. centerpiece ESS 2.5 GeV proton linac utilizing superconducting RF cavities operating at 2 K. In addition to cooling the SRF cavities, cryogenics also used liquid hydrogen moderators surrounding target. uses both helium nitrogen number planned instruments. There significant cryogenic installation associated with site acceptance...
Experiments at the FLASH linac DESY have demonstrated that higher order modes (HOMs) induced in superconducting cavities can be used to provide a variety of beam and cavity diagnostics. The centres determined from orbit which produces minimum power dipole HOM modes. phase amplitude as high resolution position monitor. For most accelerators, existing couplers necessary signals, downmix digitizing electronics are straightforward, similar those for conventional BPM.
The European Spallation Source (ESS) is one of Europe's largest research infrastructures, tobring new insights to the grand challenges science and innovation in fields as diverse material life sciences, energy, environmental technology, cultural heritage,solid-state fundamental physics by end decade. collaborative project funded a collaboration 17 countries under design construction Lund, Sweden. A 5 MW, long pulse proton accelerator used reach this goal. pulsed length 2.86 ms repetition...
We present a low-cost 0.25 /spl mu/m SiGe BiCMOS technology that is being manufactured in an 8-inch production line. The includes modules for super-self-aligned (SSA) transistors, poly resistors, metal-oxide-metal (MOM) capacitors and thick-metal inductors added to CMOS core process without any change the process. With independently developed high-energy implanted collector buried layer, bipolar devices with maximum f/sub T/ of 72 GHz max/ 116 GHz, thick metal Q/spl ges/15 have been...
Reexamen de Confucianism and Taoism Weber a la lumiere son livre Economic Ethics qui permet voir structure du precedent| le but y apparait et porte excuser les defauts d'interpretation qu'on denonce d'ordinaire.
We report on measurements of the transverse wakefields induced by collimators differing characteristics. An apparatus allowing insertion different collimator jaws into path a beam was installed in End Station A (ESA) SLAC. Eight comparable geometries were designed, including one that would allow easy comparison with previous results, and this apparatus. Measurements kick due to made energy 28.5 GeV, dimensions 100 microns vertically range 0.5 1.5 mm longitudinally. The trajectory upstream...