Letter Published: 20 December 1969 Distribution of Pulsar Duty Cycles G. R. HENRY & H.-J. PAIK Nature 224, 1188–1189 (1969) Cite this article ...

“The achievement of continuous operation, 140W output at 50 percent duty cycle, with our EUV light source proves we are very close to achieving high power, low cost, and stable LPP light sources ...