NDLI: Status of the darht 2nd axis accelerator at the Los Alamos national laboratory

Content Provider	IEEE Xplore Digital Library
Author	Scarpetti, R.D. Nath, S. Barraza, J. Ekdahl, C.A. Jacquez, E. McCuistian, B.T. Nielsen, K. Schulze, M. Seitz, J. Caporaso, G.J. Chen, Y.-J. Logan, G. Bieniosek, F.
Copyright Year	2007
Description	Author affiliation: Los Alamos Nat. Lab., Los Alamos (Scarpetti, R.D.; Nath, S.; Barraza, J.; Ekdahl, C.A.; Jacquez, E.; McCuistian, B.T.; Nielsen, K.; Schulze, M.; Seitz, J.)
Abstract	The Dual Axis Radiographic Hydrodynamic Test Facility (DARHT) was constructed at Los Alamos National Laboratory as a radiographic facility to provide dual-axis multi-time radiography to support the US Stockpile Stewardship Program. The DARHT $1^{st}$ Axis has been operational since 1999 and has been providing excellent radiographs. The DARHT $2^{nd}$ Axis construction project was completed in early 2003. However, during the subsequent commissioning efforts to bring it to the full specifications of 17 MeV, 2 kA and 2 microsecond pulse length, high voltage breakdown was observed in several of the 78 induction accelerator cells. In January 2004, the DARHT $2^{nd}$ Axis Refurbishment and Commissioning Project was launched. It is a Los Alamos National Laboratory effort in collaboration with the Lawrence Livermore and Lawrence Berkeley National Laboratories. Its purpose is to first address the HV breakdown problems with the $2^{nd}$ Axis accelerator cells, address the remaining physics of the multi-pulse electromagnetic kicker and X-ray converter target and then commission the full energy $2^{nd}$ Axis accelerator. The redesign of the cell as well as long pulse beam stability tests were completed in 2005. Testing of the multi-pulse electromagnetic kicker and X-ray converter target was completed in February of this year using an 8 MeV scaled accelerator that used twenty-six refurbished accelerator cells. Commissioning of the $2^{nd}$ Axis 2.5 MV, 2.0 kA electron injector and the full-energy accelerator beamline is currently underway. Commissioning of the downstream transport section and multi-pulse kicker will begin in early October of 2007 after accelerator commissioning is completed. Target commissioning is scheduled to begin in November 2007. The DARHT $2^{nd}$ Axis is scheduled for completion in early 2008, at which point the DARHT facility will be ready to support two-axis, multi-pulse radiography in support of the Stockpile Stewardship Program. In this paper, we present the overall project status, commissioning strategy and schedule.
Starting Page	831
Ending Page	835
File Size	833467
Page Count	5
File Format	PDF
ISBN	9781424409167
DOI	10.1109/PAC.2007.4441094
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2007-06-25
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Laboratories Radiography Testing Life estimation Hydrodynamics Test facilities Dielectric breakdown Collaboration Electric breakdown Physics
Content Type	Text
Resource Type	Article

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