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Comparison of Proposed First Wall Experiments

Comparison of Proposed First Wall Experiments. Jake Blanchard HAPL MWG Fusion Technology Institute University of Wisconsin e-meeting – June 2003. Goal. Assess the ability of various proposed experiments to mimic HAPL conditions Ensure thorough documentation of HAPL exposure experiments.

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Comparison of Proposed First Wall Experiments

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  1. Comparison of Proposed First Wall Experiments Jake Blanchard HAPL MWG Fusion Technology Institute University of Wisconsin e-meeting – June 2003

  2. Goal • Assess the ability of various proposed experiments to mimic HAPL conditions • Ensure thorough documentation of HAPL exposure experiments

  3. Preliminary Assessment of Exposure Experiments • UCSD Laser, XAPPER, Z, and RHEPP can all mimic surface thermostructural effects • Those which can provide an initial temperature of around 500 C will do better • Cooling the back of the sample is beneficial for multiple shot tests

  4. Preliminary Assessment of Exposure Experiments • All these experiments produce peak temperatures faster than HAPL (tens of ns vs. a few microseconds) • The IR Experiment at ORNL will probably be best for testing W/steel interface issues (cracking, bond strength, etc.)

  5. Archival Data for Experiments • We must take care to properly archive the results of exposure experiments • This will help to retain value of data as we learn new aspects of the failure and roughening mechanisms for the various materials

  6. Proposed List of Data for Experiments • Target Material(s) • Material Identifier (Code) • Thermal conductivity • Heat Capacity • Density • Target Thickness • Target Surface Finish • Target Dimensions • Experiment Name • Energy Form • Energy Spectrum • Energy Deposition Profile • Number of Cycles • Pulse Width • Dwell Time • Heat Flux History • Fluence per Pulse

  7. Proposed List of Data for Experiments • Chamber Environment • Mass Loss • Initial Target Temperature • Is the target cooled? How? • Estimated Temperature History • Measured Temperature History

  8. What I Still Need? • Temperature simulation from each experiment • Rest of data for comparison table • Suggestions for experiment data sheet

  9. MeV ion-beam surface analysis (RBS, NRA, ERDA) is now on-line at UW-Madison Substrate identification example Trace detection of H and He isotopes D. Whyte, B. Cipiti

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