Technology: general issues 2 high power 0D dynamic model 1 220 GHz 1 Energy industries & utilities 1 Gyrotron 1 HPM source 1 MIG 1 PFN-Marx 1 TE02 mode 1 W-band 1 broadband 1 broadband window 1 capacity 1 compact 1 confocal waveguide 1 degradation 1 dielectric properties 1 district heating 1 electromagnetic pulse (EMP) shielding 1 energy storage 1 failure threshold time 1 folded waveguide (FWG) 1 frequency tuning 1 gas switch 1 gaussian beam 1 gyro-TWT 1 gyrotron 1 gyrotrons 1 heat dissipation fins 1