BCC-W FUSION LAB

Tungsten Radiation Damage Cascade Workbench

Interactive Atomistic BCC Tungsten Lattice
Lattice: Pristine [600 K]
t = 0.00 ps [Ballistic Peak]
Core Spike: 600 K
Click + drag on lattice to set custom PKA trajectory & energy
Thermal Spike Evolution Scrub 0.0 ps / 12.0 ps
1. Ballistic (0-0.5ps)
2. Melt Spike (0.5-2ps)
3. Quench (2-6ps)
4. Defects (6-12ps)
Pristine W Atom
Primary Knock-on / Ion
Thermal Spike Melt Zone
Self-Interstitial Atom (SIA)
Vacancy
<111> Dislocation Cluster
Radiation Damage Scaling & NRT Analytics
Regime: Superlinear
Surviving Frenkel Pairs 940 NRT Standard: 701
NRT Damage Ratio 1.34x > 1.0 = Superlinear Excess
Cluster Fraction 42.5% Large SIA Loops (>4 atoms)
Peak Ballistic Disp. 3,820 75.4% recombined during quench
Superlinear Transition Regime (50 – 200 keV)

Under 14.1 MeV D-T fusion neutron recoils, high-energy tungsten subcascades coalesce into single continuous molten thermal spikes. This suppressed in-cascade recombination drives surviving Frenkel pairs 34% above standard NRT predictions, with extensive interstitial cluster nucleation.

Log-Log Defect Production vs PKA Recoil Energy • Active Recoil Coordinate
Microstructural Degradation Metrics dpa/pulse: ~0.0094
• Vacancy Density: 0.94%
• Dislocation Loop Nucleation: High (1/2<111>)
• Molten Peak Volume: 18.4 nm³
• Shockwave Speed: 4.8 km/s
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