D. Douglas
A5110495778- Neutrino Physics Research
- Particle Accelerators and Free-Electron Lasers
- Particle accelerators and beam dynamics
- Dark Matter and Cosmic Phenomena
- Particle physics theoretical and experimental studies
- Astrophysics and Cosmic Phenomena
- Particle Detector Development and Performance
- Superconducting Materials and Applications
- Radiation Detection and Scintillator Technologies
- Nuclear Physics and Applications
- Magnetic confinement fusion research
- Photocathodes and Microchannel Plates
- Advanced Power Generation Technologies
- Atomic and Subatomic Physics Research
- Muon and positron interactions and applications
- Gyrotron and Vacuum Electronics Research
- Nuclear reactor physics and engineering
- Field-Flow Fractionation Techniques
- Industrial Engineering and Technologies
- Radiation Therapy and Dosimetry
- Distributed and Parallel Computing Systems
- Advanced X-ray Imaging Techniques
- Nuclear Materials and Properties
- Semiconductor materials and devices
- Electron and X-Ray Spectroscopy Techniques
SLAC National Accelerator Laboratory
2024
Michigan State University
1990-2023
Thomas Jefferson National Accelerator Facility
1994-2021
Continuous Electron Beam Accelerator Facility
2002
Momoyama Gakuin University
1990
Concordia University
1990
University of Hawaiʻi at Mānoa
1990
University of California, Los Angeles
1990
Loyola University Maryland
1990
The Large Hadron electron Collider (LHeC) is designed to move the field of deep inelastic scattering (DIS) energy and intensity frontier particle physics. Exploiting recovery technology, it collides a novel, intense beam with proton or ion from High Luminosity--Large (HL-LHC). accelerator interaction region are for concurrent electron-proton proton-proton operation. This report represents an update Conceptual Design Report (CDR) LHeC, published in 2012. It comprises new results on parton...
A conceptual design is presented of a novel energy-recovering linac (ERL) facility for the development and application energy recovery technique to linear electron accelerators in multi-turn, large current regime. The main characteristics powerful experiment (PERLE) are derived from Large Hadron Collider, an beam upgrade under study LHC, which it would be key demonstrator. PERLE thus projected as investigate efficient, high (HC) (>10 mA) ERL operation with three re-circulation passages...
We describe the current status of DarkLight experiment at Jefferson Laboratory. is motivated by possibility that a dark photon in mass range 10 to 100 MeV/c$^2$ could couple sector Standard Model. will precisely measure electron proton scattering using MeV beam intensity 5 mA Laboratory energy recovering linac incident on windowless gas target molecular hydrogen. The complete final state including scattered electron, recoil proton, and e+e- pair be detected. A phase-I has been funded...
For a high-brightness electron beam with high bunch charge traversing recirculation line, coherent synchrotron radiation and space effects may result in microbunching instability (MBI). Both tracking simulation Vlasov analysis for an early design of circulator cooler ring (CCR) the Jefferson Lab Electron Ion Collider (JLEIC) reveal significant MBI [Ya. Derbenev Y. Zhang, Proceedings Workshop on Beam Cooling Related Topics, COOL'09, Lanzhou, China, 2009 (2009), FRM2MCCO01]. It is envisioned...
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.
High brightness electron accelerators, such as energy recovery linacs (ERL), often have complex particle distributions that can create difficulties in beam transport well matching to devices wigglers used generate radiation from the beam. Optical transition (OTR), OTR interferometry (OTRI), and optical diffraction-transition (ODTRI) proven be effective tools for diagnosing both spatial angular of charged beams. OTRI ODTRI been measure rms divergences, transverse phase space mapping has...
In 2012 Jefferson Laboratory's energy recovery linac (ERL) driven Free Electron Laser successful completed a transmission test in which high current CW beam (4.3 mA at 100 MeV) was transported through 2 mm aperture for 7 hours with losses as low 3 ppm. The purpose of the run to mimic an internal gas target DarkLight* - experiment designed search dark matter particle. ERL not again until late 2015 brief re-commissioning preparation next phase DarkLight. intervening years, FEL rebranded Low...
Magnetic measurements have been performed on several families of dipoles for the 10 kW IR-FEL presently under construction at Thomas Jefferson National Accelerator Facility. The requirements these magnets include varying field strengths, large horizontal apertures and parts in 10,000 homogeneity as well setability core integrated field. Measurements were made to quantify according determine hysteresis protocol, ramp rate dependence, clamp settings that are used. This paper will describe...
CEBAF has recently performed automated beam orbit control in real time. This effort was achieved by exploiting the capabilities of TACL system, using newly implemented STAR network, which easily yielded required data transfer density needed. Also involved this On-Line Envelope code OLE, provided first-order matrices that reflected current machine optics. These tools made implementation specific orbit-correction algorithms easier and increased reliability. The include beamthreading,...
A test stand for the 10 MeV, 5 mA average current injector CEBAF FEL is currently under construction. The tests will progress through two phases. first phase be devoted to characterizing gun transverse and longitudinal emittance performance as a function of bunch charge, beam size, energy. goal second achieve nominal requirements MeV injector, including length, emittance, charge per bunch, energy stability. This paper summarizes diagnostics planned used in these experiments.