X-ray diagnostic development for measurement of electron deposition to the SABRE anode

Summary form only given. Extraction applied-B ion diodes are under development on the SABRE (6 MV, 250 kA) accelerator at Sandia. We are assessing this technology for the production of high brightness lithium ion beams for inertial confinement fusion. Electron loss physics is a focus of effort since electron sheath physics affects ion beam divergence, ion beam purity, and diode impedance. An X-ray slit-imaging diagnostic is under development for detection of X-rays produced during electron deposition to the anode. This diagnostic will aid in the correlation of electron deposition to ion production to better understand the ion diode physics. The X-ray detector consists of a filter pack, scintillator and optical fiber array that is streaked onto a CCD camera. Current orientation of the diagnostic provides spatial information across the anode radius at three different azimuths or at three different X-ray energy cuts. The observed X-ray emission spectrum can then be compared to current modeling efforts examining electron deposition to the anode.