Status of the DARHT 2nd axis accelerator at the Los Alamos National Laboratory

R. D. Scarpetti, S. Nath, J. Barraza, C. A. Ekdahl, E. Jacquez, B. T. McCuistian, K. Nielsen, M. Schulze, J. Seitz, George J Caporaso, Y. J. Chen, G. Logan, F. Bieniosek

Research output: Chapter in Book/Report/Conference proceedingConference contribution

11 Scopus citations


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 1st Axis has been operational since 1999 and has been providing excellent radiographs. The DARHT 2nd 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 micro-second pulse length, high voltage breakdown was observed in several of the 78 induction accelerator cells [1]. 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 2nd axis accelerator cells [2], address the remaining physics of the multi-pulse electromagnetic kicker and X-ray converter target and then commission the full energy 2nd 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 2nd 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 this year after accelerator commissioning is completed. Target commissioning is scheduled to begin in November 2007. The DARHT 2nd 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.

Original languageEnglish (US)
Title of host publicationProceedings of the IEEE Particle Accelerator Conference
Number of pages5
StatePublished - 2007
Externally publishedYes
EventIEEE Particle Accelerator Conference, PAC07 - Albuquerque, NM, United States
Duration: Jun 25 2007Jun 29 2007


OtherIEEE Particle Accelerator Conference, PAC07
Country/TerritoryUnited States
CityAlbuquerque, NM

ASJC Scopus subject areas

  • Engineering(all)


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