|
Physical Review Special Topics - Accelerators and Beams
Physical Review Special Topics - Accelerators and Beams, is a peer reviewed, purely electronic journal, distributed without charge to readers and funded by contributions from national laboratories. It covers the full range of accelerator science and technology: subsystem and component technologies, beam dynamics; accelerator applications; and design, operation, and improvement of accelerators used in science and industry. This includes accelerators for high energy and nuclear physics, synchrotron radiation production, spallation neutron sources, medical therapy, and intense beam applications. More...
May 5, 2008 On 14 May 2008, Physical Review Special Topics - Accelerators and Beams is celebrating its 10th anniversary. PRST-AB was founded by Robert Siemann and the APS in 1998 to provide the accelerator community with its own journal, covering all aspects of accelerators from fundamental physics to technology.
Read More | More News/Announcements
|
May 1, 2008 Physical Review Special Topics - Accelerators and Beams is glad to announce and to warmly welcome eight new sponsors.
Read More | More News/Announcements
|
March 10, 2008 The American Physical Society announces a highly selective award program to recognize scientists who have been exceptionally helpful in assessing manuscripts for publication in the APS journals. The program will annually recognize 130 of the 42,000 currently active referees, but in this inaugural year a larger group of 534 referees has been selected for the “Outstanding Referee” designation.
Read More | More News/Announcements
|
January 10, 2008 Physical Review Special Topics - Accelerators and Beams is offering a Special Edition for the 11th European Particle Accelerator Conference that will be held June 23-27, 2008 in Genoa, Italy. This Special Edition offers the opportunity to expand upon original research presented at EPAC 2008 in a peer-reviewed journal. APS would like to acknowledge the financial contribution made by EPAC'08 in support of the journal. More Information.... More News/Announcements
|
Affilitated Professional Groups
The Division of Physics of Beams of the American Physical Society and the European Physical Society Accelerators Group serve as Affiliated Professional Groups for Physical Review Topics Special Accelerators and Beams. Together they share the responsibility for the health and vitality of the journal by providing advice and encouraging scholarly publication in accelerator science and technology.
Sponsors
Because of the generous support by sponsors, this journal is provided without charge to either authors or readers; no subscription is necessary. For more information about becoming a sponsor, please contact the Editor, Frank Zimmermann.
Physical Review Special Topics — Accelerators and Beams (PRST-AB) publishes Conference Editions, Special Editions and Special Collections. The Special and Conference Editions are associated with accelerator conferences, and the Special Collections bring together the work of groups and collaborations.
More Information»
Recently published articles in Physical Review Special Topics - Accelerators and Beams. See the current issue for more.
Editorials and Announcements
Frank Zimmermann
[Phys. Rev. ST Accel. Beams 11, 050002
] Published Mon May 5, 2008
Read article
Frank Zimmermann
[Phys. Rev. ST Accel. Beams 11, 050001
] Published Thu May 1, 2008
Read article
Low-and Intermediate-Energy Accelerators
G. Taban, M. P. Reijnders, S. C. Bell, S. B. van der Geer, O. J. Luiten, and E. J. Vredenbregt
We describe here a specially designed accelerator structure and a pulsed power supply that are essential parts of a high brightness cold atoms-based electron source. The accelerator structure allows a magneto-optical atom trap to be operated inside of it, and also transmits subnanosecond electric fi...
[Phys. Rev. ST Accel. Beams 11, 050102
] Published Wed May 7, 2008
Read article
J. E. Coleman, P. A. Seidl, J. L. Vay, A. W. Molvik, and W. M. Sharp
Electron cloud and gas measurements were conducted in a solenoid lattice with a 10 μs, singly charged K+ ion bunch at an ion energy of 0.3 MeV and currents of 26 and 45 mA. The principal objective of these experiments is to control electrons and understand their impact on the beam dynamics. ...
[Phys. Rev. ST Accel. Beams 11, 050103
] Published Wed May 7, 2008
Read article
J. E. Coleman, P. A. Seidl, E. Henestroza, M. A. Leitner, P. K. Roy, W. L. Waldron, D. Baca, I. Haber, A. W. Molvik, W. M. Sharp, and J. Armijo
An experiment to inject and match a 10 μs, singly charged K+ ion bunch at an ion energy of 0.3 MeV, current of 45 mA, and dimensionless perveance of 10-3 into a solenoid lattice has been carried out at LBNL. The principal objective of this experiment is to match and transport the space-charg...
[Phys. Rev. ST Accel. Beams 11, 050101
] Published Tue May 6, 2008
Read article
Pulsed-Power Accelerators, Technology, and Dynamics
Nichelle Bruner, Thomas Genoni, Elizabeth Madrid, David Rose, Dale Welch, Kelly Hahn, Joshua Leckbee, Salvador Portillo, Bryan Oliver, Vernon Bailey, and David Johnson
Pulsed-power driven x-ray radiographic systems are being developed to operate at higher power in an effort to increase source brightness and penetration power. Essential to the design of these systems is a thorough understanding of electron power flow in the transmission line that couples the pulsed...
[Phys. Rev. ST Accel. Beams 11, 040401
] Published Wed Apr 9, 2008
Read article
D. R. Welch, T. C. Genoni, D. V. Rose, N. L. Bruner, and W. A. Stygar
We have developed 1D analytic and 2D fully electromagnetic models of radial transmission-line impedance transformers. The models have been used to quantify the power-transport efficiency and pulse sharpening of such transformers as a function of voltage pulse width and impedance profile. For the cas...
[Phys. Rev. ST Accel. Beams 11, 030401
] Published Mon Mar 17, 2008
Read article
Synchrotron Radiation and Free-Electron Lasers
Deng haixiao (邓海啸), Wang xingtao (王兴涛), and Dai zhimin (戴志敏)
In order to generate coherent hard x-ray free-electron laser (FEL), cascading stages of high-gain harmonic generation (HGHG) scheme usually employ seed pulse with longitudinal length down to tens of femtoseconds. Such a short pulse length (SPL) seed laser, with broad bandwidth in the spectral domain...
[Phys. Rev. ST Accel. Beams 11, 040703
] Published Tue Apr 29, 2008
Read article
Ivan V. Bazarov, Dimitre G. Ouzounov, Bruce M. Dunham, Sergey A. Belomestnykh, Yulin Li, Xianghong Liu, Robert E. Meller, John Sikora, Charles K. Sinclair, Frank W. Wise, and Tsukasa Miyajima
To achieve the lowest emittance electron bunches from photoemission electron guns, it is essential to limit the uncorrelated emittance growth due to space charge forces acting on the bunch in the vicinity of the photocathode through appropriate temporal shaping of the optical pulses illuminating the...
[Phys. Rev. ST Accel. Beams 11, 040702
] Published Tue Apr 22, 2008
Read article
Juhao Wu, Zhirong Huang, and Paul Emma
The longitudinal space-charge (LSC) force can be a major cause of the microbunching instability in the linac for an x-ray free-electron laser. In this paper, the LSC-induced beam modulation is studied using an integral equation approach that takes into account the transverse (radial) variation of th...
[Phys. Rev. ST Accel. Beams 11, 040701
] Published Wed Apr 16, 2008
Read article
T. Plettner and R. L. Byer
We describe a proposed all-dielectric laser-driven undulator for the generation of coherent short wavelengths and explore the required electron beam parameters for its operation. The key concept for this laser-driven undulator is its ability to provide phase synchronicity between the deflection forc...
[Phys. Rev. ST Accel. Beams 11, 030704
] Published Thu Mar 20, 2008
Read article
High-Energy Accelerators and Colliders
Peder Eliasson
The Compact Linear Collider (CLIC) main linac is sensitive to dynamic imperfections such as element jitter, injected beam jitter, and ground motion. These effects cause emittance growth that, in case of ground motion, has to be counteracted by a trajectory feedback system. The feedback system itself...
[Phys. Rev. ST Accel. Beams 11, 051003
] Published Wed May 14, 2008
Read article
S. Y. Zhang and V. Ptitsyn
With the significant beam intensity improvement in RHIC polarized proton run 2005 and run 2006, the emittance growth becomes a luminosity limiting factor. The beam emittance growth has a dependence on the dynamic pressure rise, which in RHIC proton runs is mainly caused by the electron cloud. The de...
[Phys. Rev. ST Accel. Beams 11, 051001
] Published Mon May 12, 2008
Read article
Xiao-Long Zhang, Kip Bishofberger, Vsevolod Kamerdzhiev, Valery Lebedev, Vladimir Shiltsev, Randy Thurman-Keup, and Alvin Tollestrup
In the collider run II, the Tevatron operates with 36 high intensity bunches of 980 GeV protons and antiprotons. Particles not captured by the Tevatron rf system pose a threat since they can quench the superconducting magnets during acceleration or at beam abort. We describe the main mechanisms fo...
[Phys. Rev. ST Accel. Beams 11, 051002
] Published Mon May 12, 2008
Read article
W. Fischer, M. Blaskiewicz, J. M. Brennan, H. Huang, H.-C. Hseuh, V. Ptitsyn, T. Roser, P. Thieberger, D. Trbojevic, J. Wei, S. Y. Zhang, and U. Iriso
Since 2001, the Relativistic Heavy Ion Collider has experienced electron cloud effects, some of which have limited the beam intensity. These include dynamic pressure rises (including pressure instabilities), tune shifts, a reduction of the instability threshold for bunches crossing the transition en...
[Phys. Rev. ST Accel. Beams 11, 041002
] Published Fri Apr 18, 2008
Read article
A. Apyan et al. NA59 Collaboration
The processes of coherent bremsstrahlung (CB) and coherent pair production (CPP) based on aligned crystal targets have been studied in the energy range 20–170 GeV. The experimental arrangement allowed for measurements of single photon properties of these phenomena including their polarization dep...
[Phys. Rev. ST Accel. Beams 11, 041001
] Published Wed Apr 16, 2008
Read article
Riccardo de Maria
Colliders use final focus systems to reduce the transverse beam sizes at the interaction point in order to increase collision event rates. The maximum focal strength (gradient) of the quadrupoles, and the maximum beam size in them, together limit the beam size reduction that is possible. The goal of...
[Phys. Rev. ST Accel. Beams 11, 031001
] Published Mon Mar 31, 2008
Read article
New Acceleration Techniques
Valeri D. Dougar-Jabon, Eduardo A. Orozco, and Anatoly M. Umnov
In this paper, the cyclotron autoresonance acceleration of electrons in a stationary inhomogeneous magnetic field is studied. The trajectory and energy of electrons are found through a numerical solution of the relativistic Newton-Lorentz equation by a finite difference method. The electrons move al...
[Phys. Rev. ST Accel. Beams 11, 041302
] Published Tue Apr 22, 2008
Read article
F. Gao, M. E. Conde, W. Gai, C. Jing, R. Konecny, W. Liu, J. G. Power, T. Wong, and Z. Yusof
Dielectric-loaded power extraction is a method for the generation of high-power radio frequency (rf) waves under development for future particle accelerators. In this method, a high-charge electron beam drives a wakefield in a dielectric-loaded waveguide (the decelerator) and an rf output coupler ex...
[Phys. Rev. ST Accel. Beams 11, 041301
] Published Tue Apr 1, 2008
Read article
O. Klimo, J. Psikal, J. Limpouch, and V. T. Tikhonchuk
Acceleration of ions from ultrathin foils irradiated by intense circularly polarized laser pulses is investigated using one- and two-dimensional particle simulations. A circularly polarized laser wave heats the electrons much less efficiently than the wave of linear polarization and the ion accelera...
[Phys. Rev. ST Accel. Beams 11, 031301
] Published Mon Mar 17, 2008
Read article
Low-Energy, Multiple-Particle Dynamics
Shaoheng Wang
Derbenev proposed producing a high quality flat beam of high-transverse-emittance ratio (HTER) with a linear accelerator. Kim also discussed the round-to-flat transformation of angular-momentum-dominated beam. Fermilab/NICADD Photoinjector Laboratory has performed many experiments on HTER beam produ...
[Phys. Rev. ST Accel. Beams 11, 054201
] Published Fri May 2, 2008
Read article
Relativistic, Multiple-Particle Dynamics
Marco Venturini
A 1D model of space-charge impedance, assuming a transversely uniform beam with circular cross section, has been proposed and is being extensively used in the modeling of the microbunching instability of relevance for the beam delivery systems of x-ray free-electron lasers. In this paper we investig...
[Phys. Rev. ST Accel. Beams 11, 034401
] Published Tue Mar 25, 2008
Read article
Comments and Replies
Robert E. Shafer
This Comment presents unpublished and published work done by Los Alamos National Laboratory (LANL) in the period 1990 to 1999 using the nonlinear focusing method outlined in the recent publication by Yuri et al. [Phys. Rev. ST Accel. Beams 10, 104001 (2007)]. The LANL work included theory, design, ...
[Phys. Rev. ST Accel. Beams 11, 039001
] Published Thu Mar 20, 2008
Read article
Yosuke Yuri, Nobumasa Miyawaki, Tomihiro Kamiya, Watalu Yokota, Kazuo Arakawa, and Mitsuhiro Fukuda
In order to clarify the difference of outcomes between our recent work [Y. Yuri et al., Phys. Rev. ST Accel. Beams 10, 104001 (2007)] and the work done by Los Alamos National Laboratory in the 1990s outlined in the Comment [R. E. Shafer, Phys. Rev. ST Accel. Beams 11, 039001 (2008)], we briefly s...
[Phys. Rev. ST Accel. Beams 11, 039002
] Published Thu Mar 20, 2008
Read article
Papers recently accepted for publication in Physical Review Special Topics - Accelerators and Beams (view more).
Synchrotron Radiation, Free-Electron Lasers and Coherent Radiation Sources
Vertical beam emittance correction with independent component analysis method
F. Wang and S. Y. Lee
The vertical beam emittance in an electron storage ring is mainly determined by two factors: the linear betatron coupling and the spurious vertical dispersion generated by magnet errors. We find that the contribution of spurious vertical dispersion is larger than that generated by the linear betatron coupling. Using the independent component analysis (ICA) method, we develop stopband correction to reduce the vertical emittance. We demonstrate our method by making ICA and correction to a quadruple-bend achromatic (QBA) low emittance lattice. Six families of skew quadrupoles can effectively minimize both the vertical dispersion and the linear betatron coupling.
Accepted Tue May 6, 2008
New Acceleration Techniques
Production and characterization of attosecond electron bunch trains
Christopher M. S. Sears, Eric Colby, Rasmus Ischebeck, Christopher McGuinness, Janice Nelson, Robert Noble, Robert H. Siemann, James Spencer, Dieter Walz, Tomas Plettner and Robert L. Byer
We report the production of optically spaced attosecond electron microbunches produced by the inverse Free Electron Laser (IFEL) process. The IFEL is driven by a Ti:sapphire laser synchronized with the electron beam. The IFEL is followed by a magnetic chicane that converts the energy modulation into the longitudinal microbunch structure. The microbunch train is characterized by observing Coherent Optical Transition Radiation (COTR) at multiple harmonics of the bunching. Experimental results are compared with 1D analytic theory showing good agreement. Estimates of the bunching factors are given and correspond to a microbunch length of 410 attosec. fwhm. The formation of stable attosecond electron pulse trains marks an important step towards direct laser acceleration.
Accepted Wed May 14, 2008
Other Accelerator Subsystems and Technologies
Deflection of 400 GeV/c proton beam with bent silicon crystals at the CERN Super Proton Synchrotron
Walter Scandale, Alberto Carnera, Gianantonio Della Mea, Davide De Salvador, Riccardo Milan, Alberto Vomiero, Stefano Baricordi, Pietro Dalpiaz, Massimiliano Fiorini, Vincenzo Guidi, Giuliano Martinelli, Andrea Mazzolari, Emiliano Milan, Giovanni Ambrosi, Philipp Azzarello, Roberto Battiston, Bruna Bertucci, William J. Burger, Maria Ionica, Paolo Zuccon, Gianluca Cavoto, Roberta Santacesaria, Paolo Valente and Erik Vallazza
This paper presents a detailed study of the deflection phenomena of a 400 GeV/c proton beam impinging on a new generation of bent silicon crystals; the tests have been performed at the CERN Super Proton Synchrotron H8 beamline. Channeling and volume reflection angles are measured with an extremely precise goniometer and with high resolution silicon microstrip detectors. Volume reflection has been observed and measured for the first time at this energy, with a single-pass efficiency as large as 98%, in good agreement with the simulation results. This efficiency makes volume reflection a possible candidate for collimation with bent crystals at the CERN Large Hadron Collider.
Accepted Wed May 14, 2008
Low-Energy, Multiple-Particle Dynamics
Particle tracking study of the synchrotron injection with field interferences
M. J. Shirakata, H. Fujimori, Y. Irie and T. Takayanagi
The large-bore magnets in the injection system of a high-intensity proton synchrotron are placed close to each other as compared to their bore sizes. In such cases, the magnetic cores interfere with the fringe fields of adjacent magnets. Moreover, the incoming beam passes through the several kinds of time-varying fields along the injection line and the non-linear field region of the ring quadrupole magnet. The beam behavior under these conditions is analyzed by using the Runge-Kutta method. Although the interference of the magnetic fields does not result in emittance growth, it produces a closed-orbit distortion. Field fluctuations of the time-varying field cause an emittance growth and the non-linear field deforms the beam profile in phase space of the incoming beam. These effects lead to the modification of the injection scheme. This study focuses on the particle tracking with magnetic field interferences during the early stage of beam commissioning, when the space charge force is not important.
Accepted Thu May 8, 2008
Applications
Source to-target simulation of simultaneous longitudinal and transverse focusing of heavy ion beams
D. R. Welch, J. E. Coleman, P. A. Seidl, P. K. Roy, E. Henestroza, E. P. Lee, A. B. Sefkow, E. P. Gilson, T. C. Genoni and D. V. Rose
Longitudinal bunching factors in excess of 70 of a 300-keV, 27-mA K+ ion beam have been demonstrated in the Neutralized Drift Compression Experiment [P. K. Roy, et al., Phys. Rev. Lett. 95, 234801 (2005)] in rough agreement with LSP particle-in-cell source-to-target simulations. A key aspect of these experiments is that a pre-formed plasma provides charge neutralization of the ion beam in the last one meter drift region where the beam perveance becomes large. The simulations utilize the measured ion source temperature, diode voltage, and induction-bunching-module voltage waveforms in order to determine the initial beam longitudinal phase space which is critical to accurate modeling of the longitudinal compression. To enable simultaneous longitudinal and transverse compression, numerical simulations were used in the design of the solenoidal focusing system that compensated for the impact of the applied velocity tilt on the transverse phase space of the beam. Complete source-to-target simulations, that include detailed modeling of the diode, magnetic transport, induction bunching module, and plasma neutralized transport, were critical to understanding the interplay between the various accelerator components in the experiment. Here, we compare simulation results with the experiment and discuss the contributions to longitudinal and transverse emittance that limit the final compression.
Accepted Mon Apr 21, 2008
All Accepted Papers
|
|
Commemorating 50 years of moving physics forward.
|
|
|
|
Did you know?
Over 100,400 referrals to referees were made in 2007 for Physical Review journals.
|
|
News, Announcements, and Editorials
More News
|
