J. Brennan

ORCID: 0009-0009-8009-4935
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About
Contact & Profiles
Research Areas
  • Particle accelerators and beam dynamics
  • Particle Accelerators and Free-Electron Lasers
  • Superconducting Materials and Applications
  • Gyrotron and Vacuum Electronics Research
  • Photonic and Optical Devices
  • Power Line Communications and Noise
  • Advancements in PLL and VCO Technologies
  • Analog and Mixed-Signal Circuit Design
  • Nuclear Physics and Applications
  • Magnetic confinement fusion research
  • Semiconductor materials and devices
  • X-ray Spectroscopy and Fluorescence Analysis
  • Advanced MIMO Systems Optimization
  • Wireless Communication Networks Research
  • Physics and Engineering Research Articles
  • Copper-based nanomaterials and applications
  • Advanced Photocatalysis Techniques
  • Electron and X-Ray Spectroscopy Techniques
  • Tribology and Lubrication Engineering
  • Industrial and Mining Safety
  • Electromagnetic Compatibility and Measurements
  • Fluid Dynamics and Vibration Analysis
  • Laser-Plasma Interactions and Diagnostics
  • Nuclear reactor physics and engineering
  • Gold and Silver Nanoparticles Synthesis and Applications

University of Glasgow
2023-2025

Nottingham Trent University
2014

National Library of Luxembourg
2007

RIKEN BNL Research Center
2006

Brookhaven National Laboratory
1987-2005

Associated Universities, Inc.
1987

Superhydrophobic surfaces show strong potential for drag reducing applications.If such a surface supports Cassie-Baxter state with low solid fraction and when immersed it retains plastron air layer, large slip can occur across its consequent reduction in drag.In this work we report facile method creating hydrophobic cylinders flat varying roughness able to support state.Cylinders of 12mm diameter were coated hydrophobised sand grain sizes the ranges 50-100µm, 212-300µm 425-600µm 600-710µm...

10.1088/0022-3727/47/20/205302 article EN Journal of Physics D Applied Physics 2014-05-01

Electron energy loss spectra collected from fresh and corroded silver nanoparticles are compared with those a number of reference materials, focusing on the M

10.1111/jmi.13348 article EN cc-by Journal of Microscopy 2024-08-08

We report progress on the R&D program for electron-cooling of Relativistic Heavy Ion Collider (RHIC). This electron cooler is designed to cool 100 GeV/nucleon at storage energy using 54 MeV electrons. The source will be a superconducting RF photocathode gun. accelerator recovery linac. frequency set 703.75 MHz. maximum bunch 9.38 MHz, with charge 20 nC. has following components: photoinjector and its photocathode, linac cavity, start-to-end beam dynamics magnetized electrons, cooling...

10.1109/pac.2005.1591249 article EN Proceedings of the 2003 Particle Accelerator Conference 2006-02-15

Abstract Atomic layer deposition (ALD) has been identified as a promising growth method for high-uniformity superconducting thin films quantum photonic applications, offering superior uniformity, thickness control and conformality to techniques such reactive sputtering. The potential scalability of ALD makes this especially appealing fabrication nanowires resonators across large areas. We report on the highly uniform NbN via plasma-enhanced atomic (PEALD) with radio frequency substrate...

10.1088/2633-4356/ad0aa5 article EN cc-by Materials for Quantum Technology 2023-11-08

The physics interest in a luminosity upgrade of RHIC requires the development cooling-frontier facility. Detailed calculations were made electron cooling stored beams. This has been followed by beam dynamics simulations to establish feasibility creating necessary beam. accelerator will be superconducting Energy Recovery Linac (ERL). An intensive experimental R&D program engages various elements accelerator, as described 24 contributions 2007 PAC.

10.1109/pac.2007.4441143 article EN 2007-01-01

We introduce the R&D program for electron-cooling of Relativistic Heavy Ion Collider (RHIC). This electron cooler is designed to cool 100 GeV/nucleon bunched-beam ion collider at storage energy using 54 MeV electrons. The source will be an RF photocathode gun. accelerator a superconducting recovery linac. frequency set 703.75 MHz. maximum bunch 28.15 MHz, with charge 10 nC. has following components: photoinjector, linac, start-to-end beam dynamics magnetized electrons, cooling calculations...

10.1109/pac.2003.1288834 article EN 2004-05-13

One of the most important and topical challenges quantum circuits is their scalability. Rapid Single Flux Quantum (RSFQ) technology at forefront replacing current standard CMOS-based control architectures for a number applications, including computing sensor arrays. By condensing readout to SFQ-based on-chip devices that are directly connected systems, it possible minimise total system overhead, improving scalability integration. In this work, we present novel RSFQ device generates multi...

10.48550/arxiv.2411.08670 preprint EN arXiv (Cornell University) 2024-11-13

A High Level RF (HLRF) system consisting of power amplifiers (PA's) and ferrite loaded cavities is being built by Brookhaven National Laboratory (BNL) for the Spallation Neutron Source (SNS) project. Four were are tested. Each cavity has two gaps with a design voltage 10 kV per gap will be driven PA directly adjacent to it. The uses 600 kW tetrode provide necessary drive current. All PA's tested at BNL prior shipping ORNL. dynamic tuning scheme used help compensate effect beam loading was implemented

10.1109/pac.2003.1289650 article EN 2004-07-08
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