Tungsten Fusion Defect Cascade Simulator

Click canvas to aim & launch PKA

PHASE: THERMAL SPIKE RELAXED

PKA: 85.0 keV @ (110) [22°]

PKA Recoil Energy 85 keV

Lattice Temp (T) 873 K

Neutron Flux 1.50 × 10¹&sup8;

Trajectory Angle 22°

W Atom (BCC)

PKA Recoil Ion

Self-Interstitial

Lattice Vacancy

Superlinear Cluster Loop (≥4)

Cascade Analytics

SUPERLINEAR CLUSTERING

NRT Displacements (N_d)

3,420

E_dam / 2.5 E_d (E_d=90eV)

Surviving Frenkel Pairs

946

MD Residual Yield

Defect Efficiency (η)

27.66%

N_surv / N_NRT

Large Cluster Fraction

48.20%

≥ 4-atom interstitial loops

Divertor Dose

4.12 dpa

1200 h operational exposure

Embrittlement Risk

CRITICAL

DBTT upshift ΔT > 400 K

DEFECT EFFICIENCY VS PKA RECOIL (MD vs NRT) 14.1 MeV Peak

Physical Discovery: Conventional fission recoils (<40 keV) experience in-cascade sublinear recombination saturation. Under 14.1 MeV D-T fusion (>80 keV), dense sub-cascade overlap triggers massive superlinear dislocation loops that survive recombination, severely accelerating divertor hardening and micro-cracking.