Conveners
9.3 Pulsed Power Diagnostics
- George Laity (Sandia National Laboratories)
Measuring the current delivered to a pulsed-power load is key to understanding its expected behavior. On the Z Pulsed Power Facility, the load current is most accurately measured using velocimetry techniques such as VISAR (Velocity Interferometer System for Any Reflector) and PDV (Photonic Doppler Velocimetry). These diagnostics measure the expansion of a metallic plate or ‘flyer’ that is...
Large pulsed power accelerators, such as the Z Pulsed Power Facility at Sandia National Laboratories, routinely deliver large current pulses to a variety of high energy density physics experiments including compact x-ray sources, inertial confinement fusion targets, materials compression experiments, and more. The variety of experimental requirements for these studies typically span a large...
The Spallation Neutron Source (SNS) injection system transports a chopped 1ms H- ion beam from the Linac into the accumulation ring where two electrons are stripped from each ion, resulting in a proton beam propagating in the ring. The injection kickers use a 1400A current source with a 1 ms discharge time to bump particles into the accumulator ring and transport waste beam to the injection...
The Cygnus Dual Beam Radiographic Facility includes two identical radiographic sources - Cygnus 1 and Cygnus 2. Cygnus is the radiography source used in Subcritical Experiments (SCEs) at the Nevada National Security Site (NNSS). The machine specifications are: Electric 2.25 MV, 60 kA, 60 ns; Radiation 4 Rad, 1 mm, 50 ns; Operation single shot, 2-shots/day. Cygnus has operated at the NNSS since...
The Cygnus Dual Beam Radiographic Facility consists of two identical radiographic sources each with a dose rating of 4-rad at 1 m, and a 1-mm diameter spot size. The development of the rod pinch diode was responsible for the ability to meet these criteria¹. The rod pinch diode in a Cygnus machine uses a 0.75-mm diameter, tapered tip, tungsten anode rod extended through a 9-mm diameter,...
Within the frame of the Common Research Laboratory initiated in 2017 between French Atomic Energy and Alternative Energies Commission (CEA) and Pau University (UPPA), FPGA based developments have been initiated in order to evaluate the potential benefits of such technology regarding the pulsed power applications domain.
Thus, some investigations are currently undergoing on the monitoring...
