Day at LHC timelapsed to 4:45 minutes

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Discussion Overview

The discussion revolves around a video showcasing a timelapse of operations at the Large Hadron Collider (LHC), focusing on the energy levels of the beams and the processes involved in their injection and stabilization. Participants explore the technical aspects of beam energy and current, as well as the implications of any discrepancies in beam balance.

Discussion Character

  • Technical explanation
  • Debate/contested

Main Points Raised

  • One participant shares a video of LHC operations and describes the time intervals for beam injection and stabilization, noting the varying energy levels of the beams.
  • Another participant challenges the accuracy of the first post, asserting that the beam energy should be the same for both beams due to the use of identical magnets, and clarifies that the numbers mentioned refer to beam currents, not energy levels.
  • A later reply acknowledges the correction and expresses appreciation for the clarification, indicating a willingness to understand the technical details better.
  • One participant points out that during beam injection, there are brief periods where only one beam is circulating, which may affect the reported current readings.

Areas of Agreement / Disagreement

There is disagreement regarding the interpretation of the energy levels and currents of the beams. While one participant initially presents a view that is later contested, the discussion remains unresolved as participants clarify their positions without reaching a consensus.

Contextual Notes

The discussion includes assumptions about the understanding of LHC operations and the interpretation of technical data presented in the video. There are unresolved aspects regarding the implications of beam current discrepancies.

rhody
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Thought some might enjoy this, I thought it was a cool video including the synthesizer's voice...

Reminds me vaguely of Stephen Hawking's...

Even if you are not familiar with all phases of the cycle, watching this video gives you a rough idea of the time intervals to inject (with retries, about two hours, ramp to 3500 GeV, set up collimators and adjusting to squeeze the beams from 5 mm to 2 mm, then to achieve squeezed stable beams.

If you look in the upper right hand corner, you get a more frequently updated display of each beams energy levels and they vary beam 1 from around 1.1 - 1.5 GeV, and beam 2 from around 1.8 - 2.1 GeV.

Is the fact that the beams are not in fact balanced an issue, and anomaly or by design ?

As always thanks in advance...

https://www.youtube.com/watch?v=XJLHRtEay1Y

Rhody...
 
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rhody said:
If you look in the upper right hand corner, you get a more frequently updated display of each beams energy levels and they vary beam 1 from around 1.1 - 1.5 GeV, and beam 2 from around 1.8 - 2.1 GeV.

I hate to be harsh, but this is wrong. The reason I am being less than gentle is because there is a huge amount of misinformation on the LHC going on, and things are not helped by having people who don't understand what is happening "explaining" it.

The beam energy is the number next to the word "Energy". It is measured in GeV, and is the same for Beam 1 and Beam 2. It has to be, as they use the same magnets. The numbers to the right of that are the number of protons per beam, or the beam currents, and are denoted by I(B1) and I(B2) - I is for current.

It's good to be excited, but please, please, check your facts before "explaining" them to others.
 
Vanadium 50 said:
I hate to be harsh, but this is wrong. The reason I am being less than gentle is because there is a huge amount of misinformation on the LHC going on, and things are not helped by having people who don't understand what is happening "explaining" it.

The beam energy is the number next to the word "Energy". It is measured in GeV, and is the same for Beam 1 and Beam 2. It has to be, as they use the same magnets. The numbers to the right of that are the number of protons per beam, or the beam currents, and are denoted by I(B1) and I(B2) - I is for current.

It's good to be excited, but please, please, check your facts before "explaining" them to others.

Thanks V_50,

I was just calling them as I saw them (and asking a clarifying question, which you adeptly answered), now it makes perfect sense, the protons per beam numbers do not have to agree.

You have every right and expectation to be proud of what has been achieved at CERN, thanks for the less than "pithy" response, I am trying to be as accurate as I can be given the amount of information I am able to access.

Rhody...
 
If you watch them inject, you will see during periods where only one beam is circulating, only one beam will have a reported current. These periods are probably only a few seconds long on your compressed scale, but maybe you can see them.
 

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