DARHT-II Long-Pulse Beam-Dynamics Experiments

Ekdahl, C.A.; Abeyta, E.O.; Bartsch, R.R.; Caudill, L.D.; Chan, K.C.D.; Dalmas, Dale Allen; Eversole, S.; Gallegos, R.; Harrison, J.; Holzscheiter, M. H.; Johnson, J. B.; Jacquez, E.; McCuistian, B.T.; Montoya, N.; Nath, S.; Nielsen, K.; Oró, D.; Rodríguez, Luis Rouco; Rodriguez, P.; Rowton, L.; Sanchez, M.; Scarpetti, R.; Schauer, Martin; Simmons, D.; Smith, H. Vernon; Studebaker, J.; Sullivan, G. W.; Swinney, C.; Temple, R.; Chen, Y.J.; Houck, T.; Henestroza, E.; Eylon, S.; Fawley, William M.; Yu, S.S.; Bender, H.; Broste, W.; Carlson, Carl A.; Durtschi, G.; Frayer, Daniel K.; Johnson, Douglas; Jones, Kevin C.; Meidinger, A.; Moy, K.; Sturgess, R.; Tipton, A.; Tom, C.Y.; Schulze, Martin; Hughes, T.P.; Mostrom, C. B.; Tang, Yan; Briggs, R.J.

doi:10.1109/pac.2005.1590348

Cited by 7 publications

(4 citation statements)

References 10 publications

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“…1) at Lawrence Livermore National Laboratory (LLNL) is one of the few early [5] linear induction accelerators (LIAs) to still be in daily use at a working radiography user facility. To bring it's spatial resolution capabilities up to the standards of modern radiography LIAs such as DARHT and DARHT-II [6], FXR began an upgrade effort focused on the accelerator, pulsed power, and maintenance. A sizable investment in a new Contained Firing Facility [7] had been made and, along with an aggressive radiographic test schedule, accelerator reliability would become increasingly important.…”

Section: Motivationmentioning

confidence: 99%

An improved SF6 system for the FXR induction linac blumlein switches

DeHope

Griffin

Kihara

et al. 2007

2007 IEEE Particle Accelerator Conference (PAC)

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The now-mature FXR (Flash X-Ray) radiographic facility at Lawrence Livermore National Laboratory will be briefly described with emphasis on its pulsed power system. The heart of each accelerating cell's pulseforming Blumlein is it's sulfur hexafluoride-based triggered closing switch. FXR's recent upgrade to a recirculating SF 6 gas reclamation system will be described and the resulting accelerator performance and reliability improvements documented. This was accompanied by a detailed switch breakdown study on FXR's Test Stand and the recent analysis of the resulting statistics will be shown.

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Section: Motivationmentioning

confidence: 99%

An improved SF6 system for the FXR induction linac blumlein switches

DeHope

Griffin

Kihara

et al. 2007

2007 IEEE Particle Accelerator Conference (PAC)

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“…Two versions of this diagnostic have been built and fielded: a two-view system with just two optical lines of sight, as described by Bender et al (2007) 2 and used in early stages of DARHT commissioning 3,4,5,6,7,8 , and an earlier four-view system 9 . Both systems were fielded at DARHT in easily accessible, low-environmental-risk areas.…”

Section: Introductionmentioning

confidence: 99%

Fielding of a time-resolved tomographic diagnostic

et al. 2008

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A diagnostic instrument has been developed for the acquisition of high-speed timeresolved images at the Dual-Axis Radiographic Hydrodynamic Test (DARHT) Facility at Los Alamos National Laboratory. The instrument was developed in order to create time histories of the electron beam. Four discrete optical subsystems view Cerenkov light generated at an X-ray target inside of a vacuum envelope. Each system employs cylindrical optics to image light in one direction and collapse light in the orthogonal direction. Each of the four systems images and collapses in unique axes, thereby capturing unique information. Light along the imaging axis is relayed via optical fiber to streak cameras. A computer is used to reconstruct the original image from the four optically collapsed images. Due to DARHT's adverse environment, the instrument can be operated remotely to adjust optical parameters and contains a subsystem for remote calibration. The instrument was deployed and calibrated, and has been used to capture and reconstruct images. Matters of alignment, calibration, control, resolution, adverse conditions and maintenance will be discussed.

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“…1) at Lawrence Livermore National Laboratory (LLNL) is one of the few early [5] linear induction accelerators (LIAs) to still be in daily use at a working radiography user facility. To bring its spatial resolution capabilities up to the standards of modern radiography LIAs such as DARHT and DARHT-II [6], FXR began an upgrade effort focused on the accelerator and its pulsed power. A sizable investment in a new Contained Firing Facility [7] had been made and, along with an aggressive radiographic test schedule, peak accelerator performance would become increasingly important.…”

Section: Introductionmentioning

confidence: 99%