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Simulations of Electron Effects in Superconducting Cavities with the VORPAL Code
/ Nieter, Chet (Tech-X, Boulder, Colorado) ; Cary, John R (Tech-X, Boulder, Colorado) ; Messmer, Peter (Tech-X, Boulder, Colorado) ; Smithe, David (Tech-X, Boulder, Colorado) ; Stoltz, Peter (Tech-X, Boulder, Colorado) ; Werner, Gregory (CIPS, Boulder, Colorado)
2006 - 3 p.
External link: Published version from JACoW
In : 10th European Particle Accelerator Conference, Edinburgh, UK, 26 - 30 Jun 2006, pp.2269
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Optical Injection into Laser Wake Field Accelerators
/ Cary, John R ; Bruhwiler, David L ; Esarey, Eric ; Geddes, Cameron G R ; Giacone, Rodolfo ; Leemans, Wim ; Nieter, Chet
The accelerating gradient of laser-generated wake fields in plasmas can be orders of magnitude greater than the gradients obtainable in traditional, rf structures. One of the hurdles to overcome on the road to practical utilization of said plasma wake fields for production of high energy particles is the creation of quality beams having significant charge, low emittance, and narrow energy spread. [...]
2005
In : 21st IEEE Particle Accelerator Conference, Knoxville, TN, USA, 16 - 20 May 2005, pp.e-proc. TOPA003
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7.
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Mono Energetic Beams from Laser Plasma Interactions
/ Geddes, Cameron G ; Cary, John R ; Esarey, Eric ; Leemans, Wim ; Nieter, Chet ; Schröder, Carl B ; Toth, Csaba ; Van Tilborg, Jeroen
A laser driven wakefield accelerator has been tuned to produce high energy electron bunches with low emittance and energy spread by extending the interaction length using a plasma channel. Wakefield accelerators support gradients thousands of times those achievable in RF accelerators, but short acceleration distance, limited by diffraction, has resulted in low energy beams with 100% electron energy spread. [...]
2005
External link: Published version from JACoW
In : 21st IEEE Particle Accelerator Conference, Knoxville, TN, USA, 16 - 20 May 2005, pp.69
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8.
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Development of Advanced Models for 3D Photocathode PIC Simulations
/ Dimitrov, Dimitre ; Bruhwiler, David L ; Cary, John R ; Feldman, Donald ; Jensen, Kevin ; Messmer, Peter ; Stoltz, Peter
Codes for simulating photocathode electron guns invariably assume the emission of an idealized electron distribution from the cathode, regardless of the particular particle emission model that is implemented. The output of such simulations, a relatively clean and smooth distribution with very little variation as a function of the azimuthal angle, is inconsistent with the highly irregular and asymmetric electron bunches seen in experimental diagnostics. [...]
2005
External link: Published version from JACoW
In : 21st IEEE Particle Accelerator Conference, Knoxville, TN, USA, 16 - 20 May 2005, pp.2583
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10.
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Simulations of Laser Pulse Coupling and Transmission Efficiency in Plasma Channels
/ Giacone, Rodolfo ; Bruhwiler, David L ; Cary, John R ; Dimitrov, Dimitre ; Esarey, Eric ; Geddes, Cameron G R ; Leemans, Wim ; Messmer, Peter
Optical guiding of the laser pulse in a laser wakefield accelerator (LWFA) via plasma channels can greatly increase the interaction length and, hence, the maximun energy of trapped electrons.* Energy efficient coupling of laser pulses from vacuum into plasma channels is very important for optimal LWFA performance. We present 2D particle-in-cell simulations of this problem using the VORPAL code.** Some of the mechanisms considered are enhanced leakage of laser energy transversely through the channel walls, enhanced refraction due to tunneling ionization of neutral gas on the periphery of the gas jet, ionization of neutral gas by transverse wings of the laser pulse and effect of the pulse being off axis of the channel [...]
2005
External link: Published version from JACoW
In : 21st IEEE Particle Accelerator Conference, Knoxville, TN, USA, 16 - 20 May 2005, pp.2179
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