The Al-Mg photoresonant X-ray laser scheme study was carried out on th
e 1.4-MA GIT-4 generator with a 1.7-cm separation between the liner ax
is and the Mg target. The radiation power in the pumping line was (2-3
) 10(9) W/cm and the radiation power within the 45-60-A range was 3.10
(10) W/cm. The Mg VI and MG VII lines were found by the grating spectr
ograph.