How to pronounce“antiproton”in English

The antiproton beam was fired at a thin plastic foil, which annihilated 99.9% of all the antiprotons.

Because antiprotons are negatively charged.

They form an antiproton.

With the antiprotons trapped, they measured the charge-to-mass ratio of the antiproton and compared it to that of the proton.

There's antiprotons...

- There's antiprotons going beneath our feet.

ELENA slows the antiprotons to 1.5% the speed of light, a nice slow 16.2 million kilometers per hour.

- Are the antiprotons going around in these circles?

- After the antiprotons have been slowed down in ELENA, they are sent onto five different experiments.

- And then we collect these antiprotons, bring them into the ring, the antiproton decelerator ring, which is the one we are staring on top of.

- You can't just drop an antiproton and see if it falls.

Magnets then filter out the antiprotons from the other particles and they're sent on to the next stage.

But around 0.1% of those antiprotons survived, and they came out slow enough to do experiments with them.

- I said you merge positrons and antiprotons, but we do even more complicated.

We've done protons and antiprotons, electrons and electrons, electrons and positrons on down the line.

you just don't have enough energy to make an antiproton.

This diagram talks about a proton and an antiproton coming together to produce an X particle and an anti-X particle.

So the idea here is really that we get these antiprotons every two minutes, more or less.

- Strong electric fields in the decelerator slow down the antiprotons from 96% to 10% the speed of light.

And once inside, those antiprotons have nothing to annihilate with, and nowhere to go.

- So if you want to see where we catch the antiprotons...

- You are watching a live antiproton machine.

As the positronium enters the interaction chamber, the antiproton beam needs to be fired

So, the proton has the antiproton, the neutrino has the antineutrino, and so on.

The only really big antiproton accelerator creator is a small accelerator at CERN.

Okay, so that's the antiproton thing, and if we get back to antimatter, we can talk about that- ...

And in here, you make antiprotons.

- So, what we do is we use antiprotons and positrons.

- We send antiprotons to the positronium where it makes antihydrogen.

So Fermilab doesn't make antiprotons anymore.

In 2017, the base experiment used it to measure the antiproton's magnetic moment.

And so there, that is typically making antiprotons, as opposed to making all particles in general. So let's focus on the antiproton side to begin with.

And out the other side comes a chaotic spray of protons, antiprotons and a bunch of other particles, all traveling at around 96% the speed of light.

So now, they could fill this tube with something like antiprotons.

- Yes, I would love to see where you catch the antiprotons.

So we get the antiprotons here...

surprisingly far back that is if you take a particle accelerator on the surface of the Earth and you smash together protons and antiprotons you

Now, all of this, this entire process from initial collision to the shower of particles and the formation of the antiproton, happened in the span of 10 to the minus 23 seconds.

One of the first experiments that was done, which happened before the antimatter factory was built, was testing whether the mass of a proton and antiproton

But anyways, so getting back to the antiproton business- ...

- Here, protons are accelerated up to 99.93% the speed of light and smashed into an iridium target to produce 20 million antiprotons every minute.

protons with an energy of 120 GeV, and in that, we would make antiprotons.

But that's not how they make antiprotons.

Well, it's because what CERN needs to do is to not make as many antiprotons as Fermilab did.

it goes surprisingly far back that is if you take a particle accelerator on the surface of the Earth and you smash together protons and antiprotons you