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Use of VUV Imaging to Evaluate COTR and Beam-Steering Effects in a SASE FEL at 130 nm / Lumpkin, Alex H ; Chae, Yong Chul ; Dejus, Roger J ; Erdmann, Mark ; Lewellen, John W ; Li, Yuelin
We have continued to explore VUV operations on the Advanced Photon Source (APS) self-amplified spontaneous emission (SASE) free-electron laser (FEL). With the installation of a fifth VUV imaging station located after undulator 7 of an eight-undulator series, we have performed our most complete SASE gain curve measurements at 130 nm as well as obtaining beam profile, position, and divergence information. [...]
2004 External link: Published version from JACoW
In : 26th International Free Electron Laser Conference and 11th FEL User Workshop 2004, Trieste, Italy, 29 Aug - 3 Sep 2004, pp.e-proc. TUPOS50

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An Experimental Study of the Beam-Steering Effect on the FEL Gain at LEUTL's Segmented Undulators / Chae, Yong Chul ; Erdmann, Mark ; Lewellen, John W ; Lumpkin, Alex H ; Milton, Stephen
The electron trajectories at the LEUTL, a SASE FEL facility at Argonne, were routinely corrected during the user run in order to deliver maximum radiation power to the user. Even though we knew from experience that SASE gain at the segmented undulators was dependent on the trajectory, the quantitative understanding of steering effects associated with the specific trajectory was lacking. [...]
2004 External links: Published contribution from JACoW; Published presentation from JACoW
In : 26th International Free Electron Laser Conference and 11th FEL User Workshop 2004, Trieste, Italy, 29 Aug - 3 Sep 2004, pp.e-proc. MOBOS03

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State-of-the-Art Electron Guns and Injector Designs for Energy Recovery Linacs (ERL) / Todd, Alan ; Ambrosio, Anthony ; Ben-Zvi, Ilan ; Benson, Stephen V ; Blüm, Hans ; Burrill, Andrew ; Calaga, Rama ; Cameron, Peter ; Campisi, Isidoro E ; Chang, Xiangyun et al.
A key technology issue of ERL devices for high-power free-electron laser (FEL) and 4th generation light sources is the demonstration of reliable, high-brightness, high-power injector operation. Ongoing programs that target up to 1 Ampere injector performance at emittance values consistent with the requirements of these applications are described. [...]
2005 External link: Published version from JACoW
In : 21st IEEE Particle Accelerator Conference, Knoxville, TN, USA, 16 - 20 May 2005, pp.2292

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Future Directions in Electron Sources / Lewellen, John W
The emittance-compensated rf photoinjector is in the process of evolving from an experiment in and of itself, to a laboratory instrument, to a workhorse component of large user facilities such as next-generation light sources. In recent years the performance achieved by the standard p-mode design has approached the levels predicted by theory and experiment. [...]
2005 External link: Published version from JACoW
In : 21st IEEE Particle Accelerator Conference, Knoxville, TN, USA, 16 - 20 May 2005, pp.563

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High Brightness Electron Guns for Next-Generation Light Sources and Accelerators / Bluem, Hans ; Ben-Zvi, Ilan ; Cole, Michael ; Colestock, Patrick L ; Janssen, Dietmar ; Lewellen, John W ; Murray, Alan ; Neil, George R ; Nguyen, Dinh C ; Phillips, Larry et al.
2004 - 3 p. External link: Published version from JACoW
In : 9th European Particle Accelerator Conference, Lucerne, Switzerland, 5 - 9 Jul 2004, pp.899

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Voir aussi: noms d'auteurs similaires
44	Lewellen, J W
1	Lewellen, John

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