Papers by Vladimir Shiltsev
Physical review accelerators and beams, Jul 24, 2019
This article is an extended version of the talk is given at the IPAC19 (Melbourne, Australia, May... more This article is an extended version of the talk is given at the IPAC19 (Melbourne, Australia, May 2019) on the occasion of acceptance of the ACFA/IPAC19 Nishikawa Tetsuji Prize for a recent, significant, original contribution to the accelerator field, with no age limit with citation "…for original work on electron lenses in synchrotron colliders, outstanding contribution to the construction and operation of high-energy, high-luminosity hadron colliders and for tireless leadership in the accelerator community."
Frontiers in Physics
For over half a century, high-energy particle accelerators have been a major enabling technology ... more For over half a century, high-energy particle accelerators have been a major enabling technology for particle and nuclear physics research as well as sources of X-rays for photon science research in material science, chemistry and biology. Particle accelerators for energy and intensity Frontier research in particle and nuclear physics continuously push the accelerator community to invent ways to increase the energy and improve the performance of accelerators, reduce their cost, and make them more power efficient. The accelerator community has demonstrated imagination and creativity in developing a plethora of future accelerator ideas and proposals. The technical maturity of the proposed facilities ranges from shovel-ready to those that are still largely conceptual. At this time, over 100 contributed papers have been submitted to the Accelerator Frontier of the US particle physics decadal community planning exercise known as Snowmass’2021. These papers cover a broad spectrum of topic...
US Particle Accelerator School, 24 Jan - 4 Feb 2022
Beta-functions are defined by Eg symmetric solution in free space (K=0): see lectures VL1-2, 5 es... more Beta-functions are defined by Eg symmetric solution in free space (K=0): see lectures VL1-2, 5 especially at resonant frequencies n=1 dipole n=2 quadrupole n=3 octupole n=4,5,6…
Reviews of Modern Physics, 2021
Since the initial development of charged particle colliders in the middle of the 20th century, th... more Since the initial development of charged particle colliders in the middle of the 20th century, these advanced scientific instruments have been at the forefront of scientific discoveries in high energy physics. Collider accelerator technology and beam physics have progressed immensely and modern facilities now operate at energies and luminosities many orders of magnitude greater than the pioneering colliders of the early 1960s. In addition, the field of colliders remains extremely dynamic and continues to develop many innovative approaches. Indeed, several novel concepts are currently being considered for designing and constructing even more powerful future colliders. In this paper, we first review the colliding beam method and the history of colliders, and then present the major achievements of operational machines and the key features of near-term collider projects that are currently under development. We conclude with an analysis of numerous proposals and studies for far-future colliders. The evaluation of their respective potentials reveals tantalizing prospects for further significant breakthroughs in the collider field.
Journal of Instrumentation, 2021
The first electron lenses — understood as “lenses made of electrons” rather than “lenses to focus... more The first electron lenses — understood as “lenses made of electrons” rather than “lenses to focus electrons” — were envisioned in the mid-1990s and built in the early 2000s for compensation of beam-beam effects in the Tevatron proton-antiproton collider. Since then, the lenses — a novel instrument for high-energy particle accelerators — have been added to the toolbox of modern beam facilities, being particularly useful for the energy frontier superconducting hadron colliders (“supercolliders”). In this article we briefly present the history of ideas and developments toward effective use of low-energy high-current bright electron beams in high energy accelerators and discuss the promise of their future applications.
Physics Today, 2020
Advances in accelerator technology are enabling discoveries in particle physics and other fields.
International Journal of Modern Physics A, 2019
Crystals were used at Fermilab accelerators for slow extraction and halo collimation in the Tevat... more Crystals were used at Fermilab accelerators for slow extraction and halo collimation in the Tevatron collider, and for channeling radiation generation experiments at the FAST electron linac facility. Here we overview past experience and major outcomes of these studies and discuss opportunities for new crystal acceleration R&D program.
Fermilab's Accelerator Physics Center (APC) was created in June 2007 with mission to carry out re... more Fermilab's Accelerator Physics Center (APC) was created in June 2007 with mission to carry out research and development to keep the US leading high-energy physics laboratory at the forefront of accelerator science, technology and facility operation. In support of the FNAL high-energy physics research mission, APC scientists and enginners conducted accelerator R&D aimed at next-generation and beyond accelerator facilities; provided accelerator physics support for existing operational programs and the evolution thereof; trained accelerator scientists and engineer and established experimental programs for a broad range of accelerator R&D that can be accessed by both Fermilab staff and the US and world HEP community. APC was a center-place for in-depth design, research and development efforts which allowed the Laboratory to make intelligent decisions on the ILC in the US, on the Muon Collider, as well as originate projects like PIP-II (through the Proton Driver/Project-X work), LHC-AUP (via LARP) and the IOTA/FAST R&D facility. APC was also the birthplace and host of many national and international collaborations and several educational/training programs in beam physics resulted in 27 PhD theses. In the Fall 2018, following an important milestone of the first beam circulating in the IOTA ring, the APC was reorganized into several departments in Accelerator Division, charged to carry out the accelerator physics research with IOTA/FAST beams and making it relevant for future upgrades of the Fermilab accelerator complex.
AIP Conference Proceedings, 2006
The Tevatron in Collider Run II (2001-present) is operating with six times more bunches, many tim... more The Tevatron in Collider Run II (2001-present) is operating with six times more bunches, many times higher beam intensities and luminosities than in Run I (1992-1995). Beam diagnostics were crucial for the machine start-up and the never-ending luminosity upgrade campaign. We present the overall picture of the Tevatron diagnostics development for Run II, outline machine needs for new instrumentation, present several notable examples that led to Tevatron performance improvements, and discuss the lessons for the next big machines-LHC and ILC.
Beam-Beam Compensation with Electron Beam in Tevatron Beam-Beam Tracking for Tevatron with "Elect... more Beam-Beam Compensation with Electron Beam in Tevatron Beam-Beam Tracking for Tevatron with "Electron Compressor'' Does it Work? Are the parameters of the compensation system reasonable? Are the regulation requirements (electron beam intensity, 0 position,. shape) achievable? Does the addition of a nonlinear lens (Goal #2) really reduce beam loss?
International Journal of Modern Physics A, 2015
High energy hadron colliders have been in the forefront of particle physics for more than three d... more High energy hadron colliders have been in the forefront of particle physics for more than three decades. At present, international particle physics community considers several options for a 100 TeV proton–proton collider as a possible post-LHC energy frontier facility. The method of colliding beams has not fully exhausted its potential but has slowed down considerably in its progress. This paper briefly reviews the accelerator physics and technology challenges of the future very high energy colliders and outlines the areas of required research and development towards their technical and financial feasibility.
Particle accelerators have been widely used for physics research since the early 20 th century an... more Particle accelerators have been widely used for physics research since the early 20 th century and have greatly progressed both scientifically and technologically since then. To gain an insight into the physics of elementary particles, one accelerates them to very high kinetic energy, let them impact on other particles, and detect products of the reactions that transform the particles into other particles. It is estimated that in the post-1938 era, accelerator science has influenced almost 1/3 of physicists and physics studies and on average contributed to physics Nobel Prize-winning research every 2.9 years [1]. Colliding beam facilities which produce high-energy collisions (interactions) between particles of approximately oppositely directed beams did pave the way for progress since the 1960's. Discussion below mainly follows recent publication [2]. Twenty nine colliders reached operational stage between the late 50's and now. The energy of colliders has been increasing over the years as demonstrated in Fig.1. There, the triangles represent maximum CM energy and the start of operation for lepton (usually, e+e-) colliders and full circles are for hadron (protons, antiprotons, ions, proton-electron) colliders. One can see that until the early 1990's, the CM energy on average increased by a factor of 10 every decade and, notably, the hadron colliders were 10-20 times more powerful. Since then, following the demands of high energy physics, the paths of the colliders diverged to reach record high energies in the particle reaction. The Large Hadron Colider (LHC) was built at CERN, while new e+e-colliders called "particle factories" were focused on detail exploration of phenomena at much lower energies.
Journal of Instrumentation, 2011
Collimation of proton and antiproton beams in the Tevatron collider is required to protect CDF an... more Collimation of proton and antiproton beams in the Tevatron collider is required to protect CDF and D0 detectors and minimize their background rates, to keep irradiation of superconducting magnets under control, to maintain long-term operational reliability, and to reduce the impact of beam-induced radiation on the environment. In this article we briefly describe the design, practical implementation and performance of the collider collimation system, methods to control transverse and longitudinal beam halo and two novel collimation techniques tested in the Tevatron.
Accelerator R&D has played a crucial role in enabling scientific discovery in the past century an... more Accelerator R&D has played a crucial role in enabling scientific discovery in the past century and will continue to play this role in the years to come. In the U.S., the Office of High Energy Physics of DOE's Office of Science is developing a plan for national accelerator R&D stewardship. Fermilab undertakes accelerator research, design, and development focused on superconducting radio-frequency (RF), superconducting magnet, beam cooling, and high intensity proton technologies. In addition, the Lab pursues comprehensive integrated theoretical concepts and simulations of complete future facilities on both the energy and intensity frontiers. At present, Fermilab (1) supplies integrated design concept and technology development for a multi-MW proton source (Project X) to support world-leading programs in long baseline neutrino and rare processes experiments; (2) plays a leading role in the development of ionization cooling technologies required for muon storage ring facilities at t...
Journal of Instrumentation, 2009
The Tevatron in Collider Run II (2001-present) is operating with six times more bunches and many ... more The Tevatron in Collider Run II (2001-present) is operating with six times more bunches and many times higher beam intensities and luminosities than in Run I (1992-1995). Beam diagnostics were crucial for the machine start-up and the never-ending luminosity upgrade campaign. We present the overall picture of the Tevatron diagnostics development for Run II, outline machine needs for new instrumentation, present several notable examples that led to Tevatron performance improvements, and discuss the lessons for future colliders.
Proceedings of the 1997 Particle Accelerator Conference (Cat. No.97CH36167), 1998
An asymmetric muon-proton collider is proposed as an instrument for possible quark structure sear... more An asymmetric muon-proton collider is proposed as an instrument for possible quark structure search. Energy of proton beam is supposed to be some 5-6 times of muon energy. Estimated luminosity of the collider with two rings-the Tevatron accelerator and µ-ring-is found to be of the order of 10 33 s −1 cm −2 .
Over the past 2 years the Tevatron peak luminosity steadily progressed and reached the level of 3... more Over the past 2 years the Tevatron peak luminosity steadily progressed and reached the level of 3.15 · 10³² cm² s¹ which exceeds the Run II Upgrade goal. We discuss the collider performance, illustrate limitations and understanding of beam-beam effects and present experimental results of compensation of the beam-beam effects by electron lenses--a technique of great interest for the LHC.
Uspekhi Fizicheskih Nauk, 2012
Particle colliders for high energy physics have been in the forefront of scientific discoveries f... more Particle colliders for high energy physics have been in the forefront of scientific discoveries for more than half a century. The accelerator technology of the collider has progressed immensely, while the beam energy, luminosity, facility size and the cost have grown by several orders of magnitude. The method of colliding beams has not fully exhausted its potential but its pace of progress has greatly slowed down. In this paper we very briefly review the method and the history of colliders, discuss in detail the developments over the past two decades and the directions of the R&D toward near future colliders which are currently being explored. Finally, we make an attempt to look beyond the current horizon and outline the changes in the paradigm required for the next breakthroughs. Content: 1. Introduction, colliders of today a. The method b. Brief history of the colliders, beam physics and key technologies c. Past 20 years-achievements and problems solved 2. Next 20 years: physics, technologies and machines a. LHC upgrades and lower energy colliders b. Post-LHC energy frontier lepton colliders: ILC, CLIC, Muon Collider 3. Beyond 2030's: new methods and paradigm shift a. Possible development of colliders in the resource-limited world b. Future technologies: acceleration in microstructures, in plasma and in crystals c. Luminosity limits 4. Conclusions Chapter 1: Introduction, Colliders of Today Particle accelerators have been widely used for physics research since the early 20 th century and have greatly progressed both scientifically and technologically since then. To gain an insight into the physics of elementary particles, one accelerates them to very high kinetic energy, let them impact on other particles, and detect products of the reactions that transform the particles into other particles. It is estimated that in the post-1938 era, accelerator science has influenced almost 1/3 of physicists and physics studies and on average contributed to physics Nobel Prize-winning research every 2.9 years [1]. Colliding beam facilities which produce high-energy collisions (interactions) between particles of approximately oppositely directed beams did pave the way for progress since the 1960's. The center of mass (CM) energy E cm for a head-on collision of two particles with masses m 1 ,
Physical Review Letters, 2011
A novel concept of controlled halo removal for intense high-energy beams in storage rings and col... more A novel concept of controlled halo removal for intense high-energy beams in storage rings and colliders is presented. It is based on the interaction of the circulating beam with a 5-keV, magnetically confined, pulsed hollow electron beam in a 2-m-long section of the ring. The electrons enclose the circulating beam, kicking halo particles transversely and leaving the beam core unperturbed. By acting as a tunable diffusion enhancer and not as a hard aperture limitation, the hollow electron beam collimator extends conventional collimation systems beyond the intensity limits imposed by tolerable losses. The concept was tested experimentally at the Fermilab Tevatron proton-antiproton collider. The first results on the collimation of 980-GeV antiprotons are presented.
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Papers by Vladimir Shiltsev