Here’s a funny news item about the LHC …

[BeAChooser]

https://www.dailymail.co.uk/sciencetech ... lipse.html

Scientists began preliminary tests by sending billions of protons around the LHC's ring of superconducting magnets to boost their energy and ensure the $4 billion machine was in working condition.

And next month, CERN will shoot them down a 17-mile-long tunnel at nearly the speed of light to recreate conditions a second after the Big Bang.

… snip …

On March 8, teams from around the world waited inside the underground lab for a glimpse at the beams circling inside the ring of the LHC.

The circular shape was by design as it allows for more time to accelerate the beam of particles so higher energy can be reached.

But the first attempt this month did not go as planned after the beam only made it partially around. 

But this month's experiments proved the beam trajectory was off as it did complete a full circle.

But after tinkering with the mechanics, the team watched in wonder as the beam circled the accelerator in less than 20 minutes. 

Yeah ... they were probably wondering what's still not working.

[crawler]

Looks like a typo, it was 20 units of time, probly milli seconds.

[BeAChooser]

Looks like a typo, it was 20 units of time, probly milli seconds.

Except ...

The LHC track is 17 miles long.

Light travels at 186000 miles a second.

So light would complete one circuit in 0.000091 seconds … approximately 0.0001 seconds

A millisecond is 0.001 seconds.

So light could make 10 circuits of the track in one millisecond ... or 200 circuits in 20 milliseconds.

Meaning that the protons in their test, assuming that typo, must have been traveling at roughly 1/200 the speed of light.

BUT …

Each run of the LHC starts with a linear accelerator which accelerates bunches of protons (ions) to 150MeV. From there they are dumped into a small circular accelerator called the Booster which gets the protons up to about 1.4 GeV. From there they go to another circular accelerator called the PS ring which accelerates them up 26 GeV. Then they enter yet another circular accelerator (the SPS) which gets them up to 450 GeV. Only then are they moved to the LHC which accelerates them up to multiple TeV.

So it seems to me the protons in the test were probably at least 450 GeV and I found several charts and a relativistic calculator (https://www.omnicalculator.com/physics/relativistic-ke) that show the velocity of a 450 GeV proton is already very close to the speed of light. Even at much lower energy … say the 1.4 GeV of the Booster, the velocity would be about 90 percent the speed of light. So unless I’m missing something … which certainly is possible ... I'm not sure it's the typo that you suggest.