Abstract:
The possibility of protecting a mirror of a laser on the 4d — 4p transitions of nickel-like tantalum ions against spontaneous X-rays by means of a carbon or potassium filter is considered. It is shown that such filters can transmit 75% — 80% of laser radiation at 44.83 Å, attenuating at least by half the intensity of radiation incident on the mirror in other spectral regions, which considerably suppresses the double-pass amplification.
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