�y��vlog

This approach enables the generation of attosecond X-ray pulses at terawatt-scale peak power and megahertz repetition rates without reducing the electron bunch charge.

Central to this innovation is the ytterbium thin-disk laser, which produces high-power, femtosecond pulses at megahertz repetition rates.

The National Telecommunications Information Administration will perform a two-year study on how to possibly repurpose 2,786 megahertz of spectrum, which could be used for wireless broadband, drones, and satellites.

He said the 1,600 megahertz goal over a decade was achievable but difficult.

But cosmic radio waves at frequencies below about 100 megahertz are extremely challenging to measure from Earth, because of the planet’s noise.