Results 271 to 280 of about 120,676 (317)

Attosecond Electron Bunches

Physical Review Letters, 2004
Electron bunches of attosecond duration may coherently interact with laser beams. We show how p-polarized ultraintense laser pulses interacting with sharp boundaries of overdense plasmas can produce such bunches. Particle-in-cell simulations demonstrate attosecond bunch generation during pulse propagation through a thin channel or in the course of ...
N, Naumova, I, Sokolov, J, Nees, A, Maksimchuk, V, Yanovsky, G, Mourou   +5 more
openaire   +2 more sources

Frequency-Diverse Bunching Metasurface Antenna for Microwave Computational Imaging

IEEE Transactions on Antennas and Propagation
A frequency-diverse bunching metasurface antenna (FDBMA) that can be used for microwave computational imaging (MCI) systems is proposed in this article.
Mengran Zhao, Shitao Zhu, Die Li, T. Fromentèze, M. Khalily, Xiaoming Chen, V. Fusco, O. Yurduseven   +7 more
semanticscholar   +1 more source

Superb Bunch-by-bunch Feedback R

2010
Proceedings of the 1st International Particle Accelerator Conference, IPAC2010, Kyoto ...
Drago, Alessandro, Beretta, Matteo, Bertsche, Kirk, Migliorati, Mauro, Novokhatski, Alexander   +4 more
openaire   +1 more source

Bunch-by-bunch phase measurement at KEKB

PACS2001. Proceedings of the 2001 Particle Accelerator Conference (Cat. No.01CH37268), 2002
A fast gate module has been developed at KEKB, which can pick up the signal of one bunch from a train of bunches. The gate module is attached to a turn-by-turn beam position monitor, where the beam phase is detected by an orthogonal phase technique. Characteristics of the gate module have been investigated. We have measured the bunch phase along a long
K. Akai, T. Ieiri, T. Kawamoto
openaire   +1 more source

PEP-II bunch-by-bunch current monitor

Proceedings of the 1997 Particle Accelerator Conference (Cat. No.97CH36167), 2002
PEP-II is an asymmetric B-Factory that will have 2200 meter rings storing 9 GeV electrons and 3.1 GeV positrons, each with as many as 3492 beam bunches. To minimize beam-beam instabilities it is important to have equal bunch charge in each ring. This is accomplished by measuring the relative bunch charge and controlling injection timing and intensity ...
M.J. Chin, J.A. Hinkson
openaire   +1 more source

Modeling bus bunching using massive location and fare collection data

Journal of Intelligent Transportation Systems / Taylor & Francis, 2018
Bus bunching is a well-known phenomenon for operators, users and regulators of high-frequency bus services. Bus operations are usually affected by increasing differences in the time intervals (headways) between consecutive buses.
J. Arriagada, A. Gschwender, M. Munizaga, M. Trépanier   +3 more
semanticscholar   +1 more source

Bunch-by-Bunch Feedback Kickers for SPEAR3

2017
SPEAR3 operates with a large cross-section copper vacuum chamber, mode-damped RF cavities and low-impedance insertion devices. As a result, the beam is passively stable for 280-bunch circulating beam current up to 500ma when the background gas pressure is low.
Tian, Kai, Corbett, Jeff, Fox, John, Gierman, Stephen, Hettel, Robert, Huang, Xiaobiao, Krasnykh, Anatoly, Kurita, Nadine, Lin, Qi, Martin, Donald, Safranek, James, Sebek, James, Teytelman, Dmitry   +12 more
openaire   +1 more source

Simulation of High-Efficiency Klystrons with the COM and CSM bunching

International Vacuum Electronics Conference, 2019
the two types of high effective bunching in powerful klystrons are discussed. The first bunching type, named COM, is intended for standard klystron structure with first harmonic cavities only.
A. Baikov, O. Baikova
semanticscholar   +1 more source

Bunched polymorphism

Mathematical Structures in Computer Science, 2008
We describe a polymorphic, typed lambda calculus with substructural features. This calculus extends the first-order substructural lambda calculus αλ associated with bunched logic. A particular novelty of our new calculus is the substructural treatment of second-order variables. This is accomplished through the use of bunches of type variables in typing
Collinson, Matthew, Pym, David, Robinson, Edmund   +2 more
openaire   +1 more source

The Wild Bunch:

2019
Gérard Camy’s thesis is that the violence in The Wild Bunch expresses the director’s pessimistic view of unredeemed (and potentially unredeemable) human nature. The film’s shootouts—raw, seemingly unmediated—are indicative of a societal breakdown of not just restraint but norms.
openaire   +1 more source