cosmic ray electron in a sentence

1. Very high energy cosmic ray electrons might be explained by the Centrifugal mechanism of acceleration in the magnetospheres of the Crab-like Pulsars.
2. In 1950, with the aid of a cloud chamber that contained lead plates, Ney, together with Charles Critchfield and graduate student Sophie Oleksa, searched for primary cosmic ray electrons.
3. It's difficult to find cosmic ray electron in a sentence.