A5056294063- Particle Accelerators and Free-Electron Lasers
- Particle accelerators and beam dynamics
- Superconducting Materials and Applications
- Particle Detector Development and Performance
- Gyrotron and Vacuum Electronics Research
- Particle physics theoretical and experimental studies
- Advanced X-ray Imaging Techniques
- Crystallography and Radiation Phenomena
- Laser-Plasma Interactions and Diagnostics
- Dark Matter and Cosmic Phenomena
- Distributed and Parallel Computing Systems
- International Science and Diplomacy
- Electron and X-Ray Spectroscopy Techniques
- Seismic Waves and Analysis
- Photocathodes and Microchannel Plates
- Muon and positron interactions and applications
- Magnetic confinement fusion research
- Neutrino Physics Research
- Astrophysics and Cosmic Phenomena
- History of Science and Medicine
- Geophysics and Sensor Technology
- Plasma Diagnostics and Applications
- Pulsed Power Technology Applications
- Nuclear Physics and Applications
- Radiation Therapy and Dosimetry
Fermi National Accelerator Laboratory
2015-2024
Northern Illinois University
2024
SLAC National Accelerator Laboratory
2004-2022
Lawrence Berkeley National Laboratory
2022
University of California, Irvine
2019
Fermi Research Alliance
2002-2016
Brookhaven National Laboratory
2007
Budker Institute of Nuclear Physics
1993-2002
Supercon (United States)
1994-2002
Superconductor Technologies (United States)
1995
Particle colliders for high-energy physics have been in the forefront of scientific discoveries more than half a century. The accelerator technology has progressed immensely, while beam energy, luminosity, facility size, and cost grown by several orders magnitude. method colliding beams not fully exhausted its potential but slowed down considerably progress. This paper briefly reviews history colliders, discusses development over last two decades detail, examines near-term collider projects...
Particle accelerators have been engines of discovery for many decades. The most powerful ones are used in particle physics where intense beams collide to study new particles. This has led groundbreaking discoveries our understanding matter and forces. In this article the key concepts behind development such colliders reviewed a historical perspective is provided evolution these machines. Approaches next-generation presented technology developments far-future that will further benefit...
The Integrable Optics Test Accelerator (IOTA) is a storage ring for advanced beam physics research currently being built and commissioned at Fermilab. It will operate with protons electrons using injectors momenta of 70 150 MeV/c, respectively. program includes the study nonlinear focusing integrable optical lattices based on special magnets electron lenses, dynamics space-charge effects their compensation, stochastic cooling, several other experiments. In this article, we present design...
A novel concept of controlled halo removal for intense high-energy beams in storage rings and colliders is presented. It based on the interaction circulating beam with a 5-keV, magnetically confined, pulsed hollow electron 2-m-long section ring. The electrons enclose beam, kicking particles transversely leaving core unperturbed. By acting as tunable diffusion enhancer not hard aperture limitation, collimator extends conventional collimation systems beyond intensity limits imposed by...
Abstract Colliders are essential research tools for particle physics. Numerous future collider proposal were discussed in the course of US high energy physics community strategic planning exercise Snowmass'21 . The Implementation Task Force (ITF) has been established to evaluate proposed accelerator projects performance, technology readiness, schedule, cost, and environmental impact. Corresponding metrics developed uniform comparison proposals ranging from Higgs/EW factories multi-TeV...
We present a proposal for cold copper distributed coupling accelerator that can provide rapid route to precision Higgs physics with compact 8 km footprint. This is based on recent advances increase the efficiency and operating gradient of normal conducting accelerator. technology also provides an $e^{+}e^{-}$ collider path at multi-TeV energies. In this article, we describe our vision near-term R&D program needed pursue it.
Designing a reliable target is already challenge for MW-class facilities today and has led several major accelerator to operate at lower than design power due concerns. With present plans increase beam next generation in the decade, timely R D support of robust high targets critical secure full physics benefits ambitious upgrades. A comprehensive program must be implemented address many complex challenges faced by multi MW intercepting devices. This roadmap envisioned helpful DOE-OHEP office...
The European Particle Physics Strategy Update (EPPSU) process takes a bottom-up approach, whereby the community is first invited to submit proposals (also called inputs) for projects that it would like see realised in near-term, mid-term and longer-term future. National inputs as well from Laboratories are also an important element of process. All these then reviewed by Preparatory Group (PPG), whose role organize Symposium around submitted ideas prepare discussion on importance merits...
The beam-beam effects have been the dominating sources of beam loss and lifetime limitations in Tevatron proton-antiproton collider [V. Shiltsev et al., Phys. Rev. ST Accel. Beams 8, 101001 (2005)]. Electron lenses were originally proposed for compensation electromagnetic long-range head-on interactions proton antiproton beams 2, 071001 (1999).]. Results successful employment two electron built installed are reported by al. [Phys. Lett. 99, 244801 (2007); New J. 10, 043042 (2008)] Zhang...
The beam-beam interaction in the Tevatron collider sets limits on bunch intensity and luminosity. These are caused by a tune spread each which is mostly due to head-on collisions, but there also bunch-to-bunch parasitic collisions multibunch operation. We propose compensate these effects with use of countertraveling electron beam, we present general considerations physics limitations this technique.
The Tevatron in Collider Run II (2001--present) is operating with 6 times more bunches, many higher beam intensities and luminosities than I (1992--1995). Electromagnetic long-range head-on interactions of high intensity proton antiproton beams have been significant sources loss lifetime limitations. We present observations the beam-beam phenomena results relevant studies. analyze data various methods employed operations, predict performance for planned luminosity upgrades, discuss ways to...
We report the successful application of space-charge forces a low-energy electron beam for improvement particle lifetime determined by beam-beam interaction at high-energy collider. In our experiments, an lens, novel instrument developed compensation, was set on 980-GeV proton bunch Fermilab Tevatron proton-antiproton The proton-bunch losses due to its with antiproton were reduced factor 2 when lens operating. describe principle operation and present experimental results.
The United States has a rich history in high energy particle accelerators and colliders -- both lepton hadron machines, which have enabled several major discoveries elementary physics. To ensure continued progress the field, U.S. leadership as key partner building next generation collider facilities abroad is essential; also critically important exploring of options to host future "Snowmass" study subsequent Particle Physics Project Prioritization Panel (P5) process provide timely...
Abstract While dimuonium ( μ + - ) — the “smallest QED atom” has not yet been observed, it is of utmost fundamental interest. By virtue larger mass, greater sensitivity to beyond standard model (BSM) effects than its cousins positronium or muonium, both discovered long ago, while suffering from large QCD uncertainties. Dimuonium atoms can be created in e collisions with longitudinal momentum, allowing them decay a small distance away beam crossing point and avoid prompt backgrounds. We...
Abstract C 3 is an opportunity to realize e + - collider for the study of Higgs boson at √ s = 250 GeV, with a well defined upgrade path 550 GeV while staying on same short facility footprint [2,3]. based fundamentally new approach normal conducting linear accelerators that achieves both high gradient and efficiency relatively low cost. Given advanced state designs, key system requires technical maturation main linac. This paper presents staged towards demonstrate technology Direct (source...
In the collider run II, Tevatron operates with 36 high intensity bunches of 980 GeV protons and antiprotons. Particles not captured by rf system pose a threat since they can quench superconducting magnets during acceleration or at beam abort. We describe main mechanisms for origination this uncaptured beam, present measurements its parameters means newly developed diagnostics system. The electron lens is effectively used in II operation to remove keep abort gaps safe level.
Collimation of proton and antiproton beams in the Tevatron collider is required to protect CDF D0 detectors minimize their background rates, keep irradiation superconducting magnets under control, maintain long-term operational reliability, reduce impact beam-induced radiation on environment. In this article we briefly describe design, practical implementation performance collimation system, methods control transverse longitudinal beam halo two novel techniques tested Tevatron.
Modern and future particle accelerators employ increasingly higher intensity brighter beams of charged particles become operationally limited by coherent beam instabilities. Usual methods to control the instabilities, such as octupole magnets, feedback dampers use chromatic effects, less effective insufficient. We show that, in contrast, Lorentz forces a low-energy, magnetically stabilized electron beam, or "electron lens", easily introduces transverse nonlinear focusing sufficient for...
C$^3$ is an opportunity to realize e$^+$e$^-$ collider for the study of Higgs boson at $\sqrt{s} = 250$ GeV, with a well defined upgrade path 550 GeV while staying on same short facility footprint. based fundamentally new approach normal conducting linear accelerators that achieves both high gradient and efficiency relatively low cost. Given advanced state designs, key system requires technical maturation main linac. This white paper presents staged towards demonstrate technology Direct...
We report results of the experimental test High Temperature Superconductor based fast cycling prototype accelerator magnet capable to operate up about 300 Tesla per second field ramping rate with some 0.5 T in gap. The measured upper limit for cryogenic cooling power required support conductor operation at high rates indicates great potential such types magnets rapid synchrotrons neutrino research or muon acceleration. design, construction, and supporting systems are briefly described....