Can Particles Stretch in a Particle Accelerator?

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Discussion Overview

The discussion revolves around the behavior of particles in a particle accelerator, specifically whether particles can be said to 'stretch' along their path as their velocity increases, particularly as they approach the speed of light. The inquiry touches on concepts from particle physics and relativity.

Discussion Character

  • Exploratory
  • Technical explanation
  • Conceptual clarification

Main Points Raised

  • A participant questions if particles in a particle accelerator occupy more length along their path as their velocity increases, suggesting the possibility of 'stretching' to the circumference of the accelerator.
  • Another participant asserts that relativity leads to time dilation and length contraction, implying that particles do not stretch in the way suggested.
  • A further contribution explains that the physical length of the electric field of a particle in a beam shrinks by a Lorentz factor as it is accelerated, providing specific measurements for a proton at high energy.
  • A participant acknowledges a misunderstanding regarding the principle of uncertainty, initially thinking that a particle's position would lengthen with increased velocity.

Areas of Agreement / Disagreement

Participants express differing views on the behavior of particles in terms of length and velocity, with no consensus reached on the initial question of whether particles can stretch in an accelerator.

Contextual Notes

Participants reference principles of relativity and the uncertainty principle, but the discussion does not resolve the implications of these principles on the stretching of particles.

mintparasol
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Hi all,
Just a lay person here with a healthy interest and a quick question:-

In a particle accelerator, as the particle 'beams' are accelerated, can it be said that the particle occupies more length along it's path as it's velocity increases. Is it possible that a particle could 'stretch' to the entire circumference of it's path within the accelerator as it's velocity approaches the speed of light.

I'm sure this question reveals my limited understanding of particle accelerators and particle physics in general but would be grateful for and help or guidance.
Thanks in advance,
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On the contrary, relativity is on our adventage, is not? Time dilates, length contracts.
 
If you calculate the physical length of the electric (Coulomb) field of a particle in a beam (in a beam tube), it shrinks by a Lorentz factor gamma as it is accelerated, and is roughly 1/1000 of its at-rest length for a 1000 GeV proton. So instead of being ~10 cm (~1/3 nanosecond) long, it is 10 microns (~1/3 picosecond) long.
Bob S
 
Thanks guys. I was mistakenly thinking that under the principle of uncertainty, the position of a particle in an accelerator would be a probability wave that would lengthen the faster it's velocity.
 

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