Electron deposition in thin targets

Recent theoretical and experimental studies of electron deposition in thin foils and targets are discussed with emphasis on enhancement of collisional deposition resulting from macroscopic self-beam and diode fields. The deposited power/mass identical with P/sub M/ was inferred to be P/sub M/ approximately equal to 1-2 x 10/sup 12/ watts/gm for experiments on Hydra (1 MeV, 300 KA, 100 nsec) and P/sub M/ approximately equal to 8-16 x 10/sup 12/ watts/gm on Proto I (1.5 MeV, 250 KA/side, 30 nsec). P/sub M/ is found to depend critically on current density and enclosed current in the pinch as expected.