CERN Accelerating science

CERN Document Server 7 records found  Search took 0.62 seconds. 
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
2.
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
3.
Highly Compressed Ion Beams for High Energy Density Science / Friedman, Alex ; Barnard, John J ; Briggs, Richard J ; Callahan, Debra ; Caporaso, George ; Celata, C M ; Davidson, Ronald C ; Faltens, Andy ; Grant-Logan, B ; Grisham, Larry et al.
The Heavy Ion Fusion Virtual National Laboratory (HIF-VNL) is developing the intense ion beams needed to drive matter to the High Energy Density (HED) regimes required for Inertial Fusion Energy (IFE) and other applications. An interim goal is a facility for Warm Dense Matter (WDM) studies, wherein a target is heated volumetrically without being shocked, so that well-defined states of matter at 1 to 10 eV are generated within a diagnosable region. [...]
2005 External link: Published version from JACoW
In : 21st IEEE Particle Accelerator Conference, Knoxville, TN, USA, 16 - 20 May 2005, pp.339
4.
Accelerator and Ion Beam Tradeoffs for Studies of Warm Dense Matter / Barnard, John J ; Briggs, Richard J ; Callahan, Debra ; Davidson, Ronald C ; Friedman, Alex ; Grant-Logan, B ; Grisham, Larry ; Lee, Edward ; Lee, Richard ; Olson, Craig et al.
One approach to heat a target to "Warm Dense Matter" conditions (similar, for example, to the interiors of giant planets or certain stages in Inertial Confinement Fusion targets), is to use intense ion beams as the heating source. By consideration of ion beam phase space constraints, both at the injector, and at the final focus, and consideration of simple equations of state, approximate conditions at a target foil may be calculated. [...]
2005 External link: Published version from JACoW
In : 21st IEEE Particle Accelerator Conference, Knoxville, TN, USA, 16 - 20 May 2005, pp.2568
5.
Theory of Longitudinal Beam Halo in RF Linacs : II. Envelope-Particle Resonances / Lund, Steven M ; Barnard, John J
1998 External link: Published version from JACoW
In : 17th Particle Accelerator Conference, pp.1932
6.
Theory of Longitudinal Beam Halo in RF Linacs : I. Core/Test-Particle Formulation / Barnard, John J ; Lund, Steven M
1998 External link: Published version from JACoW
In : 17th Particle Accelerator Conference, pp.1929
7.
Emittance Growth from Rotated Quadrupoles in Heavy Ion Accelerators / Barnard, John J
1996 External link: Published version from JACoW
In : 16th Biennial Particle Accelerator Conference and International Conference on High-Energy Accelerators, Dallas, TX, USA, 1 - 5 May 1995, pp.3241

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