A5047852840- Particle Accelerators and Free-Electron Lasers
- Particle accelerators and beam dynamics
- Gyrotron and Vacuum Electronics Research
- Particle Detector Development and Performance
- Advanced X-ray Imaging Techniques
- Muon and positron interactions and applications
- Neutrino Physics Research
- Particle physics theoretical and experimental studies
- Superconducting Materials and Applications
- Laser-Plasma Interactions and Diagnostics
- Laser Design and Applications
- Astrophysics and Cosmic Phenomena
- Photocathodes and Microchannel Plates
- Quantum Information and Cryptography
- Plasma Diagnostics and Applications
- Advanced Surface Polishing Techniques
- Photonic and Optical Devices
- Laser-Matter Interactions and Applications
- Quantum Chromodynamics and Particle Interactions
- Magnetic confinement fusion research
- Advanced Electron Microscopy Techniques and Applications
- Crystallography and Radiation Phenomena
- Scientific Research and Discoveries
- Quantum Mechanics and Applications
- Quantum Mechanics and Non-Hermitian Physics
Menlo School
2024
Software for Critical Systems (Spain)
2023
Schlumberger (British Virgin Islands)
2021
Universidad Andrés Bello
2020
Brookhaven National Laboratory
2004-2014
Universidad Politécnica de Madrid
2009
Lawrence Berkeley National Laboratory
1997-2009
RIKEN BNL Research Center
2002-2007
National Agency for New Technologies, Energy and Sustainable Economic Development
1985-2005
Cerro Tololo Inter-American Observatory
2004
The status of the research on muon colliders is discussed and plans are outlined for future theoretical experimental studies. Besides continued work parameters a 3-4 0.5 TeV center-of-mass (CoM) energy collider, many studies now concentrating machine near 0.1 that could be factory s-channel production Higgs particles. We discuss various components in such colliders, starting from proton accelerator needed to generate pions heavy-Z target proceeding through phase rotation decay ($\pi \to \mu...
We describe the status of our effort to realize a first neutrino factory and progress made in understanding problems associated with collection cooling muons towards that end. summarize physics can be done factories as well intense cold beams muons. The potential muon colliders is reviewed, both Higgs Factories compact high energy lepton colliders. timescale research development reviewed latest designs channels including promise ring coolers achieving longitudinal transverse simultaneously....
We analyze the prospects of a feasible, Brookhaven National Laboratory based, very long baseline neutrino oscillation experiment consisting conventional horn produced low energy wideband beam and detector 500 kton fiducial mass with modest requirements on event recognition resolution. Such an is intended primarily to determine $\mathrm{CP}$ violating effects in sector for 3-generation mixing. sensitivity such experiment. conclude that this will allow determination phase...
There have been active efforts in the U.S., Europe, and Japan on design of a Neutrino Factory. This type facility produces intense beams neutrinos from decay muons high energy storage ring. In second detailed Feasibility Study (FS2) for Factory was completed 2001. Since that report published, new ideas bunching, cooling acceleration muon developed. We incorporated these into design, which we designate as 2B (ST2B), should lead to significant cost savings over FS2 design.
This document summarizes the work of Accelerator Working Group (AWG) International Scoping Study (ISS) a Future Neutrino Factory and Superbeam Facility. The main goal activity was to reach consensus on baseline design for complex, including proton driver parameters, choice target, front-end design, acceleration system decay ring geometry. Another explore commonality, if any, between those or Beta Beam facility. In general, requirements either latter facilities are less stringent than...
Staging of two laser-driven, relativistic electron accelerators has been demonstrated for the first time in a proof-of-principle experiment, whereby distinct and serial laser acted on an beam coherently cumulative manner. Output from ${\mathrm{CO}}_{2}$ was split into beams to drive inverse free lasers (IFEL) separated by 2.3 m. The IFEL served bunch electrons $\ensuremath{\sim}3\mathrm{fs}$ microbunches, which were rephased with wave second IFEL. This represents crucial step towards...
Following a recent suggestion that binomial states exist in the quantized radiation field [ D. Stoles B. E. A. Saleh M. Teich , Opt. Acta32, 345 ( 1985)], we discuss simple physical model leads to probability distribution. We also point out relation between and generalized SU2 coherent states.
A 40 MeV electron beam, using the inverse free-electron-laser interaction, has been accelerated by $\ensuremath{\Delta}E/E\phantom{\rule{0ex}{0ex}}=\phantom{\rule{0ex}{0ex}}2.5%$ over a distance of 0.47 m. The electrons interact with 1--2 GW ${\mathrm{CO}}_{2}$ laser beam bounded 2.8 mm i.d. sapphire circular waveguide in presence tapered wiggler ${B}_{\mathrm{max}}\ensuremath{\approx}1\mathrm{T}$, and period $2.89\ensuremath{\le}{\ensuremath{\lambda}}_{w}\ensuremath{\le}3.14\mathrm{cm}$....
An electron beam microbunched on the optical wavelength scale of $\ensuremath{\approx}2.5\ensuremath{\mu}\mathrm{m}$ by an inverse free laser accelerator was observed. The optimum bunching achieved for a 1% energy modulation 32 MeV with 0.5 GW ${\mathrm{CO}}_{2}$ power. microbunching process investigated measuring coherent transition radiation produced modulated beam. A quadratic dependence signal charge observed shortest is less than $2.5\ensuremath{\mu}\mathrm{m}$. debunching...
The free-electron laser can be described by solving the Lorentz-Maxwell equations self-consistently in weak optical fields. field evolution is determined an integral equation that allows inclusion of arbitrary electron distribution function a simple way. Contour maps are used to show gain degradation due electron-beam energy spread and angular spread. In limit low gain, spectrum related spontaneous emission line shape through successively higher derivatives. high it shown growth rate becomes...
Laser-driven electron accelerators (laser linacs) offer the potential for enabling much more economical and compact devices. However, development of practical efficient laser linacs requires accelerating a large ensemble electrons together ("trapping") while keeping their energy spread small. This has never been realized before any acceleration system. We present here first demonstration high-trapping efficiency narrow via acceleration. Trapping efficiencies up to 80% spreads down 0.36% (1...
Practical ionization cooling rings could lead to lower cost or improved performance in neutrino factory muon collider designs. The ring modeled here uses realistic three-dimensional fields. of the compares favorably with linear channel used second U.S. Neutrino Factory Study. normalized 6D emittance an ideal is decreased by a factor approximately 240, compared only 15 for channel. We also examine such real-world effects as windows on absorbers and rf cavities leaving empty lattice cells...
Time-ordering techniques based on the Magnus expansion and Wei–Norman algebraic procedure are discussed their relevance usefulness to quantum optics stressed.
Neutrino factory and muon collider cooling lattices require both high gradient rf cavities strong focusing solenoids. Experiments have shown that there may be serious problems operating in the required magnetic fields. Experimental observations using vacuum fields are discussed, current published models of breakdown with without briefly summarized, some their predictions compared observations. A new theory field dependent is presented. It proposed electrons emitted by emission on asperities...
Muon Colliders have unique technical and physics advantages disadvantages when compared with both hadron electron machines. They should thus be regarded as complementary. Parameters are given of 4 TeV 0.5 high luminosity \mumu colliders, a lower demonstration machine. We discuss the various systems in such muon starting from proton accelerator needed to generate muons proceeding through cooling, acceleration storage collider ring. Problems detector background also discussed.
We propose an analytical solution to the propagation equation of optical pulse both in free-electron lasers and klystrons. Our results include a natural way lethargy wave-packet spreading.
A theoretical study of the possibility a free-electron laser in XUV and soft X-ray region spectrum, using counterpropagaing CO/sub 2/ beam as an undulator, is presented. one-dimensional model used to evaluate single-pass power gain such device. The detrimental effects due energy speed, emittance electron beam, diffraction electromagnetic undulator are explicitly incorporated formalism. An oscillator experiment also considered. solutions optical pulse evolution equation weak field, low gain,...
Philips has axiomatically defined sets of localized states which are Lorentz-invariant (while Newton-Wigner not) and divided these into three classes. Philips's conjecture concerning spin-zero states, namely, that the postulates define in a unique way, is proved to be incorrect by finding class-III set satisfies postulates. work discussed his calculations (spin-zero case) repeated without using some (explicit implicit) unnecessary hypotheses. These also extended spin-\textonehalf{} case, for...
Muon Colliders have unique technical and physics advantages disadvantages when compared with both hadron electron machines. They should thus be regarded as complementary. Parameters are given of 4 TeV 0.5 high luminosity \mu^+ \mu^- colliders, a lower demonstration machine. We discuss the various systems in such muon starting from proton accelerator needed to generate muons proceeding through cooling, acceleration storage collider ring. Detector background, polarization, nonstandard...
A complete scheme for production and cooling a muon beam three specified colliders is presented. Parameters these are given. The starts with the front end of proposed neutrino factory that yields bunch trains both signs. Emittance exchange in slow helical lattices reduces longitudinal emittance until it becomes possible to merge into single bunches, one each sign. Further all dimensions applied bunches further lattices. Final transverse required parameters achieved 50 T solenoids using high...