Microwave Proton Source (MWS) as Driver for Hyperthermal H0
{"Image DocumentName": "Microwave Proton Source (MWS) as Driver for Hyperthermal H0", "Image ImageDescription": "What do we know about the MWS from H+ production (CRL, LANL)? kTe ~ 20eV (from Chalk River Lab Langmuir probe measurements) J+ = 0.26A/cm2. Ne = 1.2 X 1012 e/cm3. N(H2) = 7.1 X 1013 H2/cm3 (molecular flow) H+ fraction 90% at ~ 1 kW 2.45GHz microwave power. Continuity equation for H0 flux based on volume production (V) and surface (A) loss. NeN(H2)<sve>V = nHovHoA/(4a) fH0 = nH0vH0/4 = 6.6 X 1018 H0/(cm2-s) (MWS)  Interesting observation: Based on 4.1sccm H2 flow rate in LANL MWS the neutral flux density effusing from the MWS is 4.7 X 1018 neutrals/(cm2-s) -> all H2 dissociated to H0! For 20% conversion efficiency (H0 -> H-), 15% solid angle efficiency, jH- = 24mA/cm2. remis = 0.4cm, IH- = 12mA, erms,n = (remis/2)(kTH-/mc2)1/2 = .065 (pmm-mrad), kTH-= 1eV. No optimization of MWS for H0 production assumed, or, possible contribution to H- production from slow positive ions. Neutrons. X-Rays. Confidentiality statement: This document is the property of Phoenix Nuclear Labs and may not be copied, used, or disclosed for any reason except as authorized by PNL.", "Image XResolution": "37", "Image YResolution": "37", "Image ResolutionUnit": "Pixels/Centimeter", "Image Software": "SlidePlayer", "Image YCbCrPositioning": "Centered"}