BCC Tungsten (100) Collision Cascade Sandbox
t = 14.2 ps (Quenched)
Presets:
BCC Lattice Tungsten
Primary Knock-on (PKA)
Vacancy (Empty Site)
Interstitial Atom
Clustered Interstitial Loop
Damage Regime & Defect Diagnostics
Superlinear (Shockwave Overlap & Cluster Spawning)
Peak Frenkel Pairs
428
Ballistic peak
Net Surviving Defects
178
Post-quench Frenkel pairs
Recombination Efficiency
58.4%
Athermal in-cascade
Cluster Fraction
34.2%
SIA loops (size > 3)
NRT Theory Deviation
+38.5%
vs classical Norgett
Cascade Duration
14.2 ps
Thermal relaxation
Interstitial Defect Cluster Size Distribution (1B-Atom MD)
Max cluster: 18 atoms
Isolated Monomers
Small (2-4)
Medium (5-10)
Large Extended Loops (>10)
Damage Scaling Regime Benchmark
E_damage vs Surviving Frenkel Pairs
Classical NRT (Linear)
arc-dpa Model (Sublinear)
1B-Atom MD (Superlinear Shift)
Current Operating Point
Superlinear Transition Insight: At 120 keV (14.1 MeV D-T neutron recoil), the dense collision shockwave overlaps with the expanding thermal spike. Instead of recombining, dense disordered zones quench rapidly, trapping +38.5% more defects than predicted by standard arc-dpa and spawning large mobile interstitial clusters.
ITER / DEMO Divertor Armor Degradation Forecaster
Flux: 10¹⁸ n/m²·s (14.1 MeV)
Cumulative Dose
2.4 dpa / fpy
Thermal Cond. Drop
-42.8%
DBTT Shift
+215 °C
Divertor Thermal Shock Cracking & Embrittlement Risk:
HIGH (Subcascade Swelling)