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CERN Document Server Pronađeno je 7 zapisa  Pretraživanje je potrajalo 0.82 sekundi 
1.
Beam Energy Scaling of Ion-Induced Electron Yield from K+ Ions Impact on Stainless Steel Surfaces / Kireeff-Covo, Michel ; Baca, David ; Barnard, John J ; Bieniosek, Frank ; Celata, C M ; Cohen, Ronald ; Friedman, Alex ; Grote, D P ; Kwan, Joe W ; Lund, Steven M et al.
The cost of accelerators for heavy-ion inertial fusion energy (HIF) can be reduced by using the smallest possible clearance between the beam and the wall from the beamline. This increases beam loss to the walls, generating ion-induced electrons that could be trapped by beam space charge potential into an "electron cloud," which can cause degradation or loss of the ion beam [...]
2005 External link: Published version from JACoW
In : 21st IEEE Particle Accelerator Conference, Knoxville, TN, USA, 16 - 20 May 2005, pp.2287
Detaljnije - Slični zapisi
2.
A Cross-Platform Numerical Model of Ion-Wall Collisions / Veitzer, Seth A ; Cohen, Ronald ; Molvik, Arthur ; Stoltz, Peter ; Vay, Jean-Luc
Ion collisions with beam-pipe walls is a significant source of secondary electron clouds and desorbed neutral gasses in particle accelerators. Ions may reflect from beam-pipe walls and undergo further collisions downstream. [...]
2005 External link: Published version from JACoW
In : 21st IEEE Particle Accelerator Conference, Knoxville, TN, USA, 16 - 20 May 2005, pp.1707
Detaljnije - Slični zapisi
3.
Initial Self-Consistent 3-D Electron-Cloud Simulations of LHC Beam with the Code WARP+POSINST / Vay, Jean-Luc ; Cohen, Ronald ; Friedman, Alex ; Furman, Miguel ; Grote, D P
We present initial results from the self-consistent beam-cloud dynamics simulations of a sample LHC beam, using a newly developed set of modeling capability based on a merger of the three-dimensional parallel Particle-In-Cell accelerator code WARP and the electron cloud code POSINST.*,** Although the storage ring model we use as a test bed to contain the beam is much simpler and shorter than the LHC, its lattice elements are realistically modeled, as is the beam and the electron cloud dynamics. The simulated mechanisms for generation and absorption of the electrons at the walls are based on previously validated models available in POSINST.***
2005 External link: Published version from JACoW
In : 21st IEEE Particle Accelerator Conference, Knoxville, TN, USA, 16 - 20 May 2005, pp.1479
Detaljnije - Slični zapisi
4.
Electron and Gas Effects on Intense, Space-Charge Dominated Ion Beams in Magnetic Quadrupoles : Comparison of Experiments and Simulations / Seidl, Peter ; Baca, David ; Bieniosek, Frank ; Cohen, Ronald ; Covo, Michel K ; Friedman, Alex ; Grote, D P ; Lund, Steven M ; Molvik, Arthur ; Vay, Jean-Luc
Accelerators for inertial fusion energy, high-energy density physics and other high intensity applications have an economic incentive to minimize the clearance between the beam edge and the aperture wall. This increases the risk from electron clouds and gas desorbed from walls [...]
2005
In : 21st IEEE Particle Accelerator Conference, Knoxville, TN, USA, 16 - 20 May 2005, pp.e-proc. FPAP015
Detaljnije - Slični zapisi
5.
Bridging Timescales for Simulating Electron Clouds / Cohen, Ronald ; Friedman, Alex ; Vay, Jean-Luc
For a range of acclerator applications, accurate simulation of electron-cloud effects requires self-consistent simulation of electrons and the main positively-charged accelerated species. For systems with multipole focusing magnets, the simulation must span timescales from electron cyclotron periods to the beam duration. [...]
2005
In : 21st IEEE Particle Accelerator Conference, Knoxville, TN, USA, 16 - 20 May 2005, pp.e-proc. ROPA009
Detaljnije - Slični zapisi
6.
Filling in the Roadmap for Self-Consistent Electron Cloud and Gas Modeling / Vay, Jean-Luc ; Cohen, Ronald ; Covo, Michel K ; Friedman, Alex ; Furman, Miguel ; Grote, D P ; Molvik, Arthur ; Seidl, Peter ; Stoltz, Peter ; Veitzer, Seth A et al.
Electron clouds and gas pressure rise limit the performance of many major accelerators. A multi-laboratory effort to understand the underlying physics via the combined application of experiment,* theory, and simulation is underway. [...]
2005 External link: Published version from JACoW
In : 21st IEEE Particle Accelerator Conference, Knoxville, TN, USA, 16 - 20 May 2005, pp.525
Detaljnije - Slični zapisi
7.
Experiments Studying Desorbed Gas and Electron Clouds in Ion Accelerators / Molvik, Arthur ; Baca, David ; Barnard, John J ; Bieniosek, Frank ; Celata, C M ; Cohen, Ronald ; Covo, Michel K ; Friedman, Alex ; Lund, Steven M ; Seidl, Peter et al.
Electron clouds and gas pressure rise limit the performance of many major accelerator rings. We are studying these issues experimentally with ~1 MeV heavy-ion beams, coordinated with significant efforts in self-consistent simulation and theory.* The experiments use multiple diagnostics, within and between quadrupole magnets, to measure the sources and accumulation of electrons and gas. [...]
2005 External link: Published version from JACoW
In : 21st IEEE Particle Accelerator Conference, Knoxville, TN, USA, 16 - 20 May 2005, pp.194
Detaljnije - Slični zapisi

Također vidi: slična imena autora
43 Cohen, R
3 Cohen, R A
6 Cohen, R C
12 Cohen, R D
54 Cohen, R E
5 Cohen, R H
23 Cohen, R J
20 Cohen, R L
1 Cohen, R M
1 Cohen, R S
1 Cohen, R W
2 Cohen, Ralph
10 Cohen, Ralph L
2 Cohen, Rami
1 Cohen, Raphael
1 Cohen, René
8 Cohen, Reuven
1 Cohen, Richard E
2 Cohen, Richard L
1 Cohen, Richard W
2 Cohen, Robert
27 Cohen, Robert S
5 Cohen, Robert Sonné
3 Cohen, Roger
5 Cohen, Roger E
1 Cohen, Roger E.
3 Cohen, Ronald E
1 Cohen, Roy
1 Cohen, Ruben Y
2 Cohen, Ryan
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