| AVS 65th International Symposium & Exhibition | |
| Vacuum Technology Division | Tuesday Sessions |
| Session VT-TuM |
| Session: | Large Vacuum Systems and Accelerator Vacuum Technology |
| Presenter: | Ronald Goeke, Sandia National Laboratories |
| Authors: | R.S. Goeke, Sandia National Laboratories S.C. Simpson, Sandia National Laboratories K.R. Coombes, Sandia National Laboratories M.K. Alam, Sandia National Laboratories D.P. Adams, Sandia National Laboratories |
| Correspondent: | Click to Email |
Next generation pulsed power systems require a better understanding of current loss and the ability to predict the scaling of current coupling. Plasma formation occurs in these devices at both the anode and cathode at high current densities. These plasmas are formed from desorbed and ionized surface and bulk electrode contaminants, expand into the anode-cathode gaps of the transmission lines (a phenomenon referred to as plasma closure), and potentially lead to shunting of current away from the fusion targets. Contaminants are pervasive on typically manufactured hardware and common on pulsed power vacuum systems. Understanding the physics of neutral desorption from electrode surfaces is a critical requirement for accurately predicting plasma formation (current loss) in pulsed power machines, We will present Temperature Programmed Desorption (TPD) results of common electrode materials, including machined wrought stainless steel and additively manufactured 304L stainless steel.
Sandia National Laboratories is a multi-mission laboratory managed and operated by National Technology and Engineering Solutions of Sandia, LLC., a wholly owned subsidiary of Honeywell International, Inc., for the U.S. Department of Energy’s National Nuclear Security Administration under contract DE-NA0003525.