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Retention of plasma-implanted D is studied in W targets damaged by a Cu ionbeam at up to 0.2 dpa with sample temperatures between 300 K and 1200 K. At a Dplasma ion fluence of $10^{24}/m^2$ on samples damaged to 0.2 dpa at 300 K, theretained D retention inventory is $4.6x10^{20} D/m^2$, about ~5.5 times higherthan in undamaged samples. The retained inventory drops to $9x10^{19} D/m^2$for samples damaged to 0.2 dpa at 1000 K, consistent with onset of vacancyannealing at a rate sufficient to overcome the elevated rate of ion beamdamage; at a damage temperature of 1200 K retention is nearly equal to valuesseen in undamaged materials. A nano-scale technique provides thermalconductivity measurements from the Cu- ion beam displacement damaged region. Wefind the thermal conductivity of W damaged to 0.2 dpa at room temperature dropsfrom the un-irradiated value of 182 +/- 3.3 W/m-K to 53 +/- 8 W/m-K.

Deuterium retention and thermal conductivity in ion-beam displacement-damaged tungsten