1 / 24

Horn/Target Material Studies at BNL Towards multi-MW Beam

Explore the effects of irradiation on various materials for beam target-horn systems, focusing on resistivity, conductivity, and structural changes under high precision analysis. Investigate the durability of different composite structures under radiation.

reide
Download Presentation

Horn/Target Material Studies at BNL Towards multi-MW Beam

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Horn/Target Material Studies at BNLTowards multi-MW Beam Nick Simos, Ph.D., P.E. Energy Sciences & Technology Departments National Synchrotron Light Source II LBNE Science Collaboration Meeting - FNAL July 15, 2009

  2. Superbeam Target-Horn Concept (from BNL Study) LBNE Science Collaboration Meeting - FNAL July 15, 2009

  3. Superbeam Target-Horn Concept LBNE Science Collaboration Meeting - FNAL July 15, 2009

  4. BNL Graphite and Carbon Composite Target SHOCK Test LBNE Science Collaboration Meeting - FNAL July 15, 2009

  5. Study effects on materials • mechanical properties • thermal expansion (high precision dilatometer) • thermal/electrical conductivity • Oxidation (high temp. furnaces and precision scales) • de-magnetization (whole probe) • Photon-spectra (Ge detector) Macroscopic analysis at BNL Hot Cells LBNE Science Collaboration Meeting - FNAL July 15, 2009

  6. Horn Material Studies – NuMi Ni-plated Aluminum LBNE Science Collaboration Meeting - FNAL July 15, 2009

  7. Irradiation, temperature and corrosive environment effect on Ni film with aluminum substrate After irradiation Before irradiation LBNE Science Collaboration Meeting - FNAL July 15, 2009

  8. Irradiation, temperature and corrosive environment effect on Ni film with aluminum substrate Ni on aluminum: Magnetic Horn of the NuMI Experiment After irradiation Before irradiation LBNE Science Collaboration Meeting - FNAL July 15, 2009

  9. LBNE Science Collaboration Meeting - FNAL July 15, 2009

  10. LBNE Science Collaboration Meeting - FNAL July 15, 2009

  11. The AlBeMet Choice LBNE Science Collaboration Meeting - FNAL July 15, 2009

  12. LBNE Science Collaboration Meeting - FNAL July 15, 2009

  13. Radiation Damage of Ti-6Al-4V Substrate LBNE Science Collaboration Meeting - FNAL July 15, 2009

  14. Resistivity-Conductivity Degradation LBNE Science Collaboration Meeting - FNAL July 15, 2009

  15. Thermal Conductivity and Radiation of Target LBNE Science Collaboration Meeting - FNAL July 15, 2009

  16. Electrical resistivity  Thermal conductivity LBNE Science Collaboration Meeting - FNAL July 15, 2009

  17. Preliminary results 3-D CC (~ 0.2 dpa) conductivity reduces by a factor of 3.22-D CC (~0.2 dpa) measured under irradiated conditions (to be compared with company data)Graphite (~0.2 dpa) conductivity reduces by a factor of 6 !!!!W (1+ dpa)  reduced by factor of Ta (1+ dpa)  ~ 40% reductionTi-6Al-4V (~ 1dpa)  ~ 10% reductionGlidcop  ~ 40% reductionAlBeMet (~0.4 dpa)  within 10% LBNE Science Collaboration Meeting - FNAL July 15, 2009

  18. Graphite and carbon-carbon composites J-P. Bonal, et al., Graphite, Ceramics and Ceramic Composites for High-Temperature Nuclear Power Systems, MRS Bulletin, V. 34, 2009 LBNE Science Collaboration Meeting - FNAL July 15, 2009

  19. While things seemed promising with carbon fiber composites A THRESHOLD PROTON FLUENCE OF ~1021 protons/cm2 HAS EMERGED J-P. Bonal, et al., Graphite, Ceramics and Ceramic Composites for High-Temperature Nuclear Power Systems, MRS Bulletin, V. 34, 2009 Good news so far  isotropic graphite and AlBeMet, Ti-6Al-4V Reactor experience (dominated by thermal neutron flux) has shown that graphite moderators can withstand tens of dpa of damage Premature degradation result of: radiation rate? or thermal neutrons vs. energetic protons ? LBNE Science Collaboration Meeting - FNAL July 15, 2009

  20. Threshold ~ 10^21 p/cm2 LBNE Science Collaboration Meeting - FNAL July 15, 2009

  21. Graphite-CC experience Accelerator Experience: TRIUMF Target; LANL Target; PSI Target Water-cooled/Edge-cooled TRIUMF target Fluence: somewhere 10^21 -10^22 p/cm2 radiation-cooled High operating temp ~1100 C LBNE Science Collaboration Meeting - FNAL July 15, 2009

  22. graphite Ti-6Al-4V LBNE Science Collaboration Meeting - FNAL July 15, 2009

  23. Summary A fluence threshold of ~ 10^21 p/cm2 has emerged that affects graphite and different carbon composite structures Isotropic graphite (IG-430) appears to have more resilience (needs further study) AlBeMet has experienced no structural damage due to radiation and environment LBNE Science Collaboration Meeting - FNAL July 15, 2009

  24. Proposed Studies Address the effect of the environment on the physical/structural changes of graphite and carbon composites due to irradiation and identify limits Explore isotropic graphite grades for irradiation damage that correspond to 2 MW beam Horn material assessment for resistivity degradation under irradiation and corrosive environment (2 MW operation) Skin Effect and resistance physio-mechanical property changes Horn options with materials other than Al (Albemet) or nano- coatings Horn inner conductor-Target integration tests and high-end simulations (current through horn, cooling schemes such as helium, monolithic conductor/target made of AlBeMet, etc) LBNE Science Collaboration Meeting - FNAL July 15, 2009

More Related