CERN Accelerating science

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1.
Long-time simulation of LHC beam propagation in electron clouds / Feng, Bing ; Benedetto, Elena ; Decyk, Viktor K ; Ghalam, Ali F ; Katsouleas, Thomas C ; Mori, Warren ; Zimmermann, Frank
In this report we show the simulation results of single-bunch instabilities caused by interaction of a proton beam with an electron cloud for the Large Hadron Collider (LHC) using the code QuickPIC [1]. We describe three new results: 1) We test the effect of the space charge of the beam on itself; 2) we add the effect of dispersion in the equation of motion in the x direction, and 3) we extend previous modeling by an order of magnitude (from 50ms to 500ms) of beam circulation time. [...]
2005 External link: Published version from JACoW
In : 21st IEEE Particle Accelerator Conference, Knoxville, TN, USA, 16 - 20 May 2005, pp.1769
2.
3-D Parallel Simulation Model of Continuous Beam-Electron Cloud Interactions / Ghalam, Ali F ; Benedetto, Elena ; Decyk, Viktor K ; Huang Cheng Kun ; Katsouleas, Thomas C ; Mori, Warren ; Rumolo, Giovanni ; Zimmermann, Frank
A 3D Particle-In-Cell model for continuous modeling of beam and electron cloud interaction in a circular accelerator is presented. A simple model for lattice structure, mainly the Quadruple and dipole magnets and chromaticity have been added to a plasma PIC code, QuickPIC, used extensively to model plasma wakefield acceleration concept. [...]
2005 External link: Published version from JACoW
In : 21st IEEE Particle Accelerator Conference, Knoxville, TN, USA, 16 - 20 May 2005, pp.549
3.
Effect of Lattice and Electron Distribution in Electron-Cloud Instability Simulations for the CERN SPS and LHC / Benedetto, Elena ; Arduini, Gianluigi ; Feng, Bing ; Franchetti, Giuliano ; Ghalam, Ali F ; Katsouleas, Thomas C ; Ohmi, Kazuhito ; Roncarolo, Federico ; Rumolo, Giovanni ; Zimmermann, Frank
Several simulation codes have been adapted so as to model the single-bunch electron-cloud instability including a realistic variation of the optical functions with longitudinal position. In addition, the electron cloud is typically not uniformly distributed around the ring, as frequently assumed, but it is mainly concentrated in certain regions with specific features, e.g., regions which give rise to strong multipacting or suffer from large synchrotron radiation flux. [...]
LHC-Project-Report-828; CERN-LHC-Project-Report-828.- Geneva : CERN, 2005 - 4 p. Access to fulltext document: PDF; External link: Published version from JACoW
In : 21st IEEE Particle Accelerator Conference, Knoxville, TN, USA, 16 - 20 May 2005, pp.387
4.
Single-Bunch Instability Driven by the Electron Cloud Effect in the Positron Damping Ring of the International Linear Collider / Pivi, M T F ; Ghalam, Ali F ; Harkay, Katherine C ; Ohmi, Kazuhito ; Raubenheimer, Tor O ; Wanzenberg, Rainer ; Wolski, Andrzej ; Zimmermann, Frank
With the recommendation that the future International Linear Collider (ILC) should be based on superconducting technology, there is considerable interest in exploring alternate designs for the damping rings (DR). The TESLA design was 17 km in circumference with a "dog-bone" configuration. [...]
SLAC-PUB-11203.- Stanford, CA : SLAC, 2005 - 3 p. External links: Fulltext from SLAC; Published version from JACoW
In : 21st IEEE Particle Accelerator Conference, Knoxville, TN, USA, 16 - 20 May 2005, pp.2884

See also: similar author names
1 Ghalam, A
1 Ghalam, A F
4 Ghalam, A Z
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