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Dan Goodin HAPL Project Review University of Wisconsin October 22-23, 2008

Introduction to the Target Fabrication Sessions Foam capsules, overcoats, “new” fab methods, cryogenics, tracking, injection, steering. Dan Goodin HAPL Project Review University of Wisconsin October 22-23, 2008. HAPL has a reference, high gain, ignition target design.

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Dan Goodin HAPL Project Review University of Wisconsin October 22-23, 2008

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  1. Introduction to the Target Fabrication Sessions Foam capsules, overcoats, “new” fab methods, cryogenics, tracking, injection, steering Dan Goodin HAPL Project Review University of Wisconsin October 22-23, 2008

  2. HAPL has a reference, high gain, ignition target design • Ongoing iteration with target designers and fabricators • iterations contributed to recent successes Spec Documents • “Prel. Specs & Reqs”, June 1, 2001 • “HAPL 350MJ-Class Baseline Target Design 10/10/05” J. Perkins High Z coating CH Overcoat Basic process steps - lab demonstrations for each step Foam + DT DT • Fab foam capsule • Overcoat foam • Fill/layer fusion fuel • Inject • Track and engage DT Vapor 2.3 mm Cryo at 17.3K Diameter = ~4.6 mm Foam Wall = ~176 m Yield = ~350 MJ Gain = ~150

  3. What are our goals, and our strategy? Long-term goal demonstrate methods to fabricate and engage > 500,000 targets/day (power plant) Target Fabrication: • Near-term goals • meet the target specifications and increase yield • Strategy • Systematic parametric studies, understanding mechanisms, experimentally verify • plus new methodologies as appropriate Target Engagement: • Goal = demonstrate hit-on-the-fly on table-top

  4. Areas being emphasized We are making HAPL targets - and working on product yields ~90% DVB Droplet survival RF DVB Curing/Drying RF DVB Sphericity RF DVB at 3% NC 65% Wall uniformity (NC) DVB at 1% NC RF at 3% NC RF at 1% NC (zero yield) Gas Retention… Surface finish… Cryo-testing of overcoated foam capsules

  5. What you will hear in the target fab sessions… TARGET FABRICATION (FOAM SHELLS) - I • Reny Paguio - significant advances in the RF foam system • sphericity, wall uniformity, foam surface improved! • Jared Hund - continuing parametric evaluations to improve that gastight overcoats • John Karnes - potential for a “skin” to smooth the foam surface and allow improved (thin) overcoats

  6. What you will hear in the target fab sessions…II TARGET FABRICATION (FOAM SHELLS) - II • David Harding - alternatives to provide HAPL targets • Tom Jones - improving foam shell centering • Jared Hund, Robin Garrell • recently awarded UC “Discovery Grant”, GA-internal & UC-system funding • our plan to evaluate alternative methods

  7. Targets- cryogenic, injection, tracking seeions • David Harding - update on LLE cryo • Drew Geller - what affects ice layer roughness • Kurt Boehm - cryogenic fluidized bed modeling and experiments • Lane Carlson - approaching engagement demo for direct drive! • Ron Petzoldt - electrostatic steering - and acceleration

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