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Physical Review Accelerators and Beams

Volume 23, Issue 12

December 2020
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HIGHLIGHTED ARTICLES

EDITORS' SUGGESTION

Coaxial multimode cavities for fundamental superconducting rf research in an unprecedented parameter space

P. Kolb, Z. Yao, T. Junginger, B. Dury, A. Fothergill, M. Vanderbanck, and R. E. Laxdal

Phys. Rev. Accel. Beams 23, 122001 (2020) - Published 2 December, 2020

Coaxial resonators for the systematic measurement of the rf properties of superconductors over a wide range of frequencies.

ARTICLES

Synchrotron Radiation and Free-Electron Lasers

Coherent x rays with tunable time-dependent polarization

N. Sudar, R. Coffee, and E. Hemsing

Phys. Rev. Accel. Beams 23, 120701 (2020) - Published 2 December, 2020

Converting conventional electron accelerators to high peak brilliance Compton light sources

I. V. Pogorelsky, M. Polyanskiy, and T. Shaftan

Phys. Rev. Accel. Beams 23, 120702 (2020) - Published 4 December, 2020

Simple model for the nonlinear radiation field of a free electron laser

Erik Hemsing

Phys. Rev. Accel. Beams 23, 120703 (2020) - Published 4 December, 2020

Enhanced seeded free electron laser performance with a “cold” electron beam

G. Penco, G. Perosa, E. Allaria, S. Di Mitri, E. Ferrari, L. Giannessi, S. Spampinati, C. Spezzani, and M. Veronese

Phys. Rev. Accel. Beams 23, 120704 (2020) - Published 28 December, 2020

High-Energy Accelerators and Colliders

Tune modulation effects for colliding beams in the High Luminosity Large Hadron Collider

S. Kostoglou, H. Bartosik, Y. Papaphilippou, G. Sterbini, and N. Triantafyllou

Phys. Rev. Accel. Beams 23, 121001 (2020) - Published 15 December, 2020

High intensity operation using proton stacking in the Fermilab Recycler to deliver 700 kW of 120 GeV proton beam

Robert Ainsworth, Philip Adamson, Bruce C. Brown, David Capista, Kyle Hazelwood, Ioanis Kourbanis, Denton K Morris, Meiqin Xiao, and Ming-Jen Yang

Phys. Rev. Accel. Beams 23, 121002 (2020) - Published 15 December, 2020

Bound-free pair production from nuclear collisions and the steady-state quench limit of the main dipole magnets of the CERN Large Hadron Collider

M. Schaumann, J. M. Jowett, C. Bahamonde Castro, R. Bruce, A. Lechner, and T. Mertens

Phys. Rev. Accel. Beams 23, 121003 (2020) - Published 18 December, 2020

Wakefield effects and mitigation techniques for nanobeam production at the KEK Accelerator Test Facility 2

Pierre Korysko, Philip N. Burrows, Andrea Latina, and Angeles Faus-Golfe

Phys. Rev. Accel. Beams 23, 121004 (2020) - Published 31 December, 2020

New Acceleration Techniques

High-quality positron acceleration in beam-driven plasma accelerators

S. Diederichs, C. Benedetti, E. Esarey, J. Osterhoff, and C. B. Schroeder

Phys. Rev. Accel. Beams 23, 121301 (2020) - Published 3 December, 2020

Longitudinal phase space synthesis with tailored 3D-printable dielectric-lined waveguides

F. Mayet, R. Assmann, and F. Lemery

Phys. Rev. Accel. Beams 23, 121302 (2020) - Published 14 December, 2020

Longitudinal current profile reconstruction from a wakefield response in plasmas and structures

R. Roussel, G. Andonian, J. B. Rosenzweig, and S. S. Baturin

Phys. Rev. Accel. Beams 23, 121303 (2020) - Published 17 December, 2020

Demonstration of tailored energy deposition in a laser proton accelerator

J. G. Zhu, M. J. Wu, K. Zhu, Y. X. Geng, Q. Liao, D. Y. Li, T. Yang, M. J. Easton, C. C. Li, X. H. Xu, Y. R. Shou, J. Q. Yu, Z. Gong, Y. Y. Zhao, P. J. Wang, D. H. Wang, L. Tao, C. E. Chen, W. J. Ma, H. Y. Lu, T. Tajima, G. Mourou, C. Lin, and X. Q. Yan

Phys. Rev. Accel. Beams 23, 121304 (2020) - Published 28 December, 2020

Radio Frequency Calculations and Technology

EDITORS' SUGGESTION

Coaxial multimode cavities for fundamental superconducting rf research in an unprecedented parameter space

P. Kolb, Z. Yao, T. Junginger, B. Dury, A. Fothergill, M. Vanderbanck, and R. E. Laxdal

Phys. Rev. Accel. Beams 23, 122001 (2020) - Published 2 December, 2020

Coaxial resonators for the systematic measurement of the rf properties of superconductors over a wide range of frequencies.

High-gradient behavior of a dipole-mode rf structure

B. Woolley, G. Burt, A. C. Dexter, R. Peacock, W. L. Millar, N. Catalan Lasheras, A. Degiovanni, A. Grudiev, G. Mcmonagle, I. Syratchev, W. Wuensch, E. Rodriguez Castro, and J. Giner Navarro

Phys. Rev. Accel. Beams 23, 122002 (2020) - Published 17 December, 2020

750 MHz radio frequency quadrupole with trapezoidal vanes for carbon ion therapy

Vittorio Bencini, Hermann W. Pommerenke, Alexej Grudiev, and Alessandra M. Lombardi

Phys. Rev. Accel. Beams 23, 122003 (2020) - Published 31 December, 2020

Beam Control, Diagnostics, and Feedback

Delay-detune scan for longitudinal electron beam characterization at free-electron lasers

Svitozar Serkez, Gianluca Geloni, Marc Guetg, Vitali Kocharyan, Shan Liu, and Evgeni Saldin

Phys. Rev. Accel. Beams 23, 122801 (2020) - Published 14 December, 2020

Policy gradient methods for free-electron laser and terahertz source optimization and stabilization at the FERMI free-electron laser at Elettra

F. H. O’Shea, N. Bruchon, and G. Gaio

Phys. Rev. Accel. Beams 23, 122802 (2020) - Published 21 December, 2020

Accelerator Materials and Surfaces

Impact of geometry on flux trapping and the related surface resistance in a superconducting cavity

Felix Kramer, Oliver Kugeler, Julia-Marie Köszegi, and Jens Knobloch

Phys. Rev. Accel. Beams 23, 123101 (2020) - Published 31 December, 2020

Particle-Beam Sources

Photoemission studies of yttrium photocathodes by using the visible radiation

J. Scifo, A. Lorusso, E. Chiadroni, P. Cinquegrana, S. Dabagov, M. Danailov, A. Demidovich, M. Ferrario, D. Garzella, A. Giribono, D. Hampai, A. Perrone, and M. Trovò

Phys. Rev. Accel. Beams 23, 123401 (2020) - Published 14 December, 2020

Other Accelerator Subsystems and Technologies

Dark current spikes as an indicator of mobile dislocation dynamics under intense dc electric fields

Eliyahu Zvi Engelberg, Jan Paszkiewicz, Ruth Peacock, Sagy Lachmann, Yinon Ashkenazy, and Walter Wuensch

Phys. Rev. Accel. Beams 23, 123501 (2020) - Published 17 December, 2020

Low-Energy, Multiple-Particle Dynamics

High dimensional characterization of the longitudinal phase space formed in a radio frequency quadrupole

K. Ruisard, A. Aleksandrov, S. Cousineau, V. Tzoganis, and A. Zhukov

Phys. Rev. Accel. Beams 23, 124201 (2020) - Published 8 December, 2020

Simulation study of a high-intensity linear accelerator operated at longitudinal phase advances above 90°

A. Rubin, L. Groening, and I. Hofmann

Phys. Rev. Accel. Beams 23, 124202 (2020) - Published 30 December, 2020

Relativistic, Multiple-Particle Dynamics

Theoretical formulation of phase space microbunching instability in the presence of intrabeam scattering for single-pass or recirculation accelerators

Cheng-Ying Tsai, Weilun Qin, Kuanjun Fan, Xiaofan Wang, Juhao Wu, and Guanqun Zhou

Phys. Rev. Accel. Beams 23, 124401 (2020) - Published 14 December, 2020

Fast-slow mode coupling instability for coasting beams in the presence of detuning impedance

N. Biancacci, E. Métral, and M. Migliorati

Phys. Rev. Accel. Beams 23, 124402 (2020) - Published 31 December, 2020

Material-Beam Interaction

Dynamics of the interaction of dust particles with the LHC beam

B. Lindstrom, P. Bélanger, A. Gorzawski, J. Kral, A. Lechner, B. Salvachua, R. Schmidt, A. Siemko, M. Vaananen, D. Valuch, C. Wiesner, D. Wollmann, and C. Zamantzas

Phys. Rev. Accel. Beams 23, 124501 (2020) - Published 30 December, 2020

REVIEW ARTICLES

Sample-efficient reinforcement learning for CERN accelerator control

Verena Kain, Simon Hirlander, Brennan Goddard, Francesco Maria Velotti, Giovanni Zevi Della Porta, Niky Bruchon, and Gianluca Valentino

Phys. Rev. Accel. Beams 23, 124801 (2020) - Published 1 December, 2020

IPAC2010 Accelerator Prize article: Particle accelerators and colliders

Stephen Myers

Phys. Rev. Accel. Beams 23, 124802 (2020) - Published 11 December, 2020

The IPAC2010 Achievement Prize for Outstanding Work in the Accelerator Field was won by Stephen Myers. This paper is an invited contribution inspired by this award.

OTHER ARTICLES OF INTEREST

Refractive Guide Switching a Regenerative Amplifier Free-Electron Laser for High Peak and Average Power Hard X Rays

Gabriel Marcus, Alex Halavanau, Zhirong Huang, Jacek Krzywinski, James MacArthur, Rachel Margraf, Tor Raubenheimer, and Diling Zhu

Phys. Rev. Lett. 125, 254801 (2020) - Published 18 December, 2020

Reducing Beam-Related Background on Forward Physics Detectors Using Crystal Collimation at the Large Hadron Collider1

D. Mirarchi, V. Avati, R. Bruce, M. Butcher, M. D’Andrea, M. Di Castro, M. Deile, B. Dziedzic, K. Hiller, S. Jakobsen, J. Kašpar, K. Korcyl, I. Lamas, A. Masi, A. Mereghetti, H. Garcia Morales, Y. Gavrikov, S. Redaelli, B. Salvachua Ferrando, P. Serrano, M. Solfaroli Camillocci, and N. Turini

Phys. Rev. Applied 14, 064066 (2020) - Published 23 December, 2020

Proton Bunch Self-Modulation in Plasma with Density Gradient

F. Braunmüller et al. (AWAKE Collaboration)

Phys. Rev. Lett. 125, 264801 (2020) - Published 28 December, 2020

LETTER

Temperature-Dependent Field Emission and Breakdown Measurements Using a Pulsed High-Voltage Cryosystem

Marek Jacewicz, Johan Eriksson, Roger Ruber, Sergio Calatroni, Iaroslava Profatilova, and Walter Wuensch

Phys. Rev. Applied 14, 061002 (2020) - Published 30 December, 2020

Field emission and vacuum breakdown limit performance in many classes of electronic devices, including rf systems in particle accelerators. Although there are general explanations of both processes, a large correction factor is systematically needed to explain observations, and experimental evidence to establish the breakdown mechanism is limited. This study elucidates both issues, using a high-voltage electrode system that can operate down to cryogenic temperatures. Measurements of temperature-dependent field emission and breakdown with this system reveal remarkable effects that yield insight into both processes, which in turn will enable further development of high-field technology.

Interaction of Ultraintense Radially-Polarized Laser Pulses with Plasma Mirrors

N. Zaïm, D. Guénot, L. Chopineau, A. Denoeud, O. Lundh, H. Vincenti, F. Quéré, and J. Faure

Phys. Rev. X 10, 041064 (2020) - Published 31 December, 2020

Spatially shaping a femtosecond laser to produce radially polarized pulses produces an electric field that pushes electrons in vacuum to relativistic speeds in the direction of laser propagation.

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