million electron volts

Two years ago, Safdi and his colleagues put the best upper limit on the mass of the QCD axion at about 16 million electron volts, or about 32 times less than the mass of the electron.

Although that amount of energy is miniscule by everyday standards, the increase occurred as the electrons traveled only three one-hundredths of a millimeter—equivalent to them gaining about 30 million electron volts over the course of a meter.

She estimates that 1,000 stages could fit on a chip a couple of centimeters in length and imbue electrons with a million electron volts’ worth of energy, allowing them to travel at about 94 percent of the speed of light.

In Lawrence’s expansive vision, Rutherford’s goal of 10 million electron volts was already within reach.

The journal carried a report by Merle Tuve claiming that his Tesla coil could drive alpha particles to energies as high as 10 million electron volts without “any serious difficulty.”