• R.D. Archuleta
  LANL, Los Alamos, New Mexico

The Dual Axis Radiographic Hydrodynamic Test Facility (DARHT) is the world's premier hydrotest firing site. DARHT contains two linear accelerators for producing flash radiographs of hydrodynamic experiments. The DARHT facility (both Axis I and Axis II) have defined Modes of operation, based on the Personnel Safety System configuration. It is the philosophy of accelerator systems that configuration of the components required to deliver beam should not rely on human attention alone. The Axis II Beam Run Permit control system implements a series of hardware and software logic elements that define and limit the Axis II states of operation and automatically establish machine operating parameters. Within each of the defined Personnel Safety System Modes, DARHT Axis II operation requires a number of different states and timing configurations. For each Beam Run Permit state, operations of Axis II requires different accelerator hardware configurations, interlocks, controls settings, and timing scenarios. The DARHT Axis II Beam Run Permit control system has provided efficiency and achieved operational configuration of the Axis II accelerator to provide peak radiographic performance.