materials discussion / integrated testing plan final optics transmissive - issues related to...

Materials Discussion / Integrated Testing Plan

Final Optics Transmissive - issues related to absorption Reflective - LIDT and effect of dust - neutron-induced swelling in GIMM and substrate - mitigate neutron induced dimensional change

Unique Issues Cyclic Thermomechanics - modeling - high cycle fatigue of engineering matl’s Pulsed Neutron Effects Pulsed X-ray - threshold and roughening He Ablation Effects Pulsed Ion

Materials Specific Issues Graphite Composite - Lifetime under high temp. irradiation - Tritium retention during high temp. irradiation - Radiation Enhanced Sublimation at high temp.

Ceramic Composite System - development and properties including fatigue

Refractory Armored System - development and properties including fatigue

Alloy system - effects of environment on fatigue properties








}Absorption studies indicated that loss would be unacceptable high in transmissive optics. Emphasis was shifted to reflectiveoptics








} Current Optics Program Plan








}

}pending








} Ghoniem work






Alloy system - effects of environment on fatigue properties}

Pending ~200 MPa at 108 cycles








} Limited ongoing work in modeling community








}}}

Planned XAPPER@LLNL and Z@SNL

Ongoing and Planned, ORNL,UNC,DELFT

Ongoing and Plannned, RHEPP@SNL








{Current OFES/HAPL work

HFIR Irradiation








{Waiting for completion of thermalablation study

{Pending







{Ongoing developmentFatigue Planned

{Proposed FY-03

Round-Robin Materials

• All “candidate” optical and structural materials under the HAPL program are being coordinated to ensure uniformity in materials chemistry, history and where appropriate the surface condition (eg polishing for surface studies.)

• Currently, the “candidate” materials being distributed are:

Tungsten: Zone refined single crystal (99.999%)Chemically Vapor Deposited (99.995%)Powder met. Polycrystalline (99.99%)

Graphite: FMI-222 balanced weave pitch fiber/matrix compositeSegri Great Lakes Near Isotropic Candidate Nuclear Graphite

Silicon Carbide: Rohm-Haas CVD Silicon Carbide

Aluminum: 1000 series, fully annealedothers tbd

materials discussion / integrated testing plan final optics transmissive - issues related to...

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