What would happen if I was standing in the LHC

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Discussion Overview

The discussion revolves around the hypothetical scenario of a person standing in the Large Hadron Collider (LHC) and being struck by a single proton traveling at 99.999991% the speed of light. Participants explore the potential physical effects of such a collision, considering both theoretical and anecdotal evidence.

Discussion Character

  • Exploratory
  • Technical explanation
  • Debate/contested

Main Points Raised

  • One participant questions whether a proton traveling at such high speed would burn a hole in their body or pass through without significant interaction.
  • Another participant references anecdotal evidence of a person in the USSR who was hit by a particle beam, resulting in severe localized radiation burns, suggesting that a similar event could occur.
  • A different viewpoint suggests that the energy of a single proton (approximately a microjoule) would likely cause minimal damage, potentially only heating up tissue or killing a few cells.
  • There is speculation about the proton's interaction with atomic nuclei, with some participants arguing that at such high speeds, the proton might not collide in a traditional sense but rather pass through, depositing energy in the process.
  • One participant mentions that Newton's penetration depth calculations may not apply in this scenario due to the nature of particle interactions at relativistic speeds.
  • Another participant notes that if a single proton were to pass through, it might not be noticeable at all, referencing the high number of protons typically used in experiments.

Areas of Agreement / Disagreement

Participants express differing views on the effects of a single proton collision, with no consensus reached on whether it would cause significant damage or be negligible. The discussion remains unresolved regarding the exact nature of the interaction.

Contextual Notes

Participants acknowledge the complexity of particle interactions at relativistic speeds and the limitations of classical physics in describing these phenomena. There are also uncertainties regarding the specifics of energy deposition and the conditions under which damage might occur.

Th3_PhYsIcS
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What would happen if I was standing in the LHC and I was hit by a (one) proton traveling at 99.999991% the speed of light. Would the collision burn a hole in me? or would it simply be going so fast that it passes through me without interacting with the particles in my body?
 
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Several physics professors were asked this question:

 
There was someone who once got hit by a particle beam in the USSR, albeit of much lower energy. It seems to have made a high-aspect ratio, extremely deep but localized radiation burn. I.E. Burning a hole in him. He did live, but had permanent injuries and... weirdness happen to that side of his face and I think even seizures.

Of course, with just 1 singular particle, the energy would be on the order of like a microjoule or so, so it wouldn't do much damage, probably heat up your hand or kill a few cells or something. It also depends on whether, after going through your hand and depositing a small fraction of it's kinetic energy, it got to go back around the loop multiple times and continue repeatedly being slowed in your hand.If it weren't moving so fast, you'd normally imagine that it would just stop dead in it's tracks after getting nanometers into you and making an explosion, but I think at that speed, the cross section of an atom that could actually have much of an effect on it's trajectory is much smaller. It probably would have to hit the nucleus, and even then, I'm not sure if that would be "solid" enough to stop them from passing straight through each other and just heating up or being blown to smithereens, but nonetheless, not fully "colliding."

Basically, Newton's penetration depth calculation is utterly worthless here because the particles aren't colliding, they are going through each other, so it'd probably go through you, depositing a few GeV.
 
Pds3.14 said:
There was someone who once got hit by a particle beam in the USSR...
Anatoli Bugorski
Bugorski was leaning over the equipment when he stuck his head in the path of the proton beam.

I couldn't find how many protons went through his head, but from the video provided by A.T., it sounds like they routinely deal with billions of them.
So my guess, without doing any math, would be that you wouldn't notice anything, if it were just a single proton.
 

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