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  1. Naked Science Forum
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  4. Do protons of the Fermilab proton beam exist?
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Do protons of the Fermilab proton beam exist?

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Offline evan_au

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Re: Do protons of the Fermilab proton beam exist?
« Reply #60 on: 27/04/2019 04:26:48 »
Quote
Protons, electrons ... and ions cannot propagate through glass without producing a hole in the glass
It is true that charged particles propagating through solid matter will slightly scatter the charged particles, by jiggling its electric fields. But most of the charged particles continues on in a (roughly) straight line.

It is true that charged particles propagating through solid matter will slightly disturb the matter, by jiggling its electric fields. But most of the matter remains close to its original position, as the matter is locked in a crystal grid, and will return to its original position after the charged particle passes.

In fact, the ALICE detector at CERN uses transparent crystals of cesium iodide in order to detect protons and other high-mass particles (this is marked HMPID in the ALICE diagram). These detectors continue to work after protons have passed through them, with new bunches arriving every 25 nanoseconds.

After passing through these crystals, the particles continue on to other detectors like calorimeters which surround the HMPID detector.

To reach these detectors, the particles generated by proton collisions must first exit the vacuum tube. They manage to do this without causing leaks which break down the very effective vacuum within the LHC beam ring. 

In reality, matter which appears quite solid to our low-energy senses (sight, touch, etc) are mostly empty space to high-energy subatomic particles.

See: https://en.wikipedia.org/wiki/ALICE_experiment#High_Momentum_Particle_Identification_Detector
https://upload.wikimedia.org/wikipedia/commons/thumb/a/a5/2012-Aug-02-ALICE_3D_v0_with_Text_%281%29_2.jpg/1024px-2012-Aug-02-ALICE_3D_v0_with_Text_%281%29_2.jpg
« Last Edit: 27/04/2019 04:29:22 by evan_au »
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Offline Kryptid

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Re: Do protons of the Fermilab proton beam exist?
« Reply #61 on: 27/04/2019 05:54:20 »
Quote from: alright1234 on 27/04/2019 02:42:50
Protons, electrons, atoms, molecules and ions cannot propagate through glass without producing a hole in the glass.

Protons and electrons absolutely can pass through glass without burning a hole in it. In order for such charged particles to get inside of a cloud chamber, obviously they must pass through the glass that contains the vapor. It doesn't punch a hole in the glass:

You can clearly demonstrate that the particles passing through the cloud chamber are electrically-charged (and therefore not gamma rays) by observing their paths curve under the influence of a magnetic field:
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Offline Bored chemist

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Re: Do protons of the Fermilab proton beam exist?
« Reply #62 on: 27/04/2019 11:31:06 »
Quote from: alright1234 on 27/04/2019 02:42:50
Protons, electrons, atoms, molecules and ions cannot propagate through glass without producing a hole in the glass.
No.
That's  simply not true.
Here's a report from people studying the diffusion of gases through pyrex glass. It's over half a century old..
https://scholarworks.umt.edu/cgi/viewcontent.cgi?article=9257&context=etd

And once again we see that you don't know what you are talking about.

Why don't you stop posting stuff until you have had a chance to learn properly?
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Offline alancalverd

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Re: Do protons of the Fermilab proton beam exist?
« Reply #63 on: 27/04/2019 18:38:00 »
How about neutrons?
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Marked as best answer by alright1234 on 27/04/2019 21:18:43

Offline alright1234 (OP)

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Re: Do protons of the Fermilab proton beam exist?
« Reply #64 on: 27/04/2019 21:18:04 »
Quote from: Kryptid on 27/04/2019 05:54:20
Quote from: alright1234 on 27/04/2019 02:42:50
Protons, electrons, atoms, molecules and ions cannot propagate through glass without producing a hole in the glass.

Protons and electrons absolutely can pass through glass without burning a hole in it. In order for such charged particles to get inside of a cloud chamber, obviously they must pass through the glass that contains the vapor. It doesn't punch a hole in the glass:

You can clearly demonstrate that the particles passing through the cloud chamber are electrically-charged (and therefore not gamma rays) by observing their paths curve under the influence of a magnetic field:

The proton source exists within the glass bubble chamber.


https://www.google.com/search?q=wilson+cloud+chamber&rlz=1C1GCEA_enUS846US846&source=lnms&tbm=isch&sa=X&ved=0ahUKEwjszvePi_HhAhUJwFQKHV8KAS4Q_AUIECgD&biw=1600&bih=757#imgrc=uXoUOTiILaG5aM:
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Offline Kryptid

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Re: Do protons of the Fermilab proton beam exist?
« Reply #65 on: 27/04/2019 22:39:26 »
Quote from: alright1234 on 27/04/2019 21:18:04
The proton source exists within the glass bubble chamber.

The particle source is inside the cloud chambers only in some cases. The first clip I posted shows cosmic rays, which obviously came from outside of the cloud chamber.
« Last Edit: 28/04/2019 04:44:09 by Kryptid »
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Offline Bored chemist

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Re: Do protons of the Fermilab proton beam exist?
« Reply #66 on: 28/04/2019 09:27:49 »
Quote from: alright1234 on 27/04/2019 21:18:04
Quote from: Kryptid on 27/04/2019 05:54:20
Quote from: alright1234 on 27/04/2019 02:42:50
Protons, electrons, atoms, molecules and ions cannot propagate through glass without producing a hole in the glass.

Protons and electrons absolutely can pass through glass without burning a hole in it. In order for such charged particles to get inside of a cloud chamber, obviously they must pass through the glass that contains the vapor. It doesn't punch a hole in the glass:

You can clearly demonstrate that the particles passing through the cloud chamber are electrically-charged (and therefore not gamma rays) by observing their paths curve under the influence of a magnetic field:

The proton source exists within the glass bubble chamber.


https://www.google.com/search?q=wilson+cloud+chamber&rlz=1C1GCEA_enUS846US846&source=lnms&tbm=isch&sa=X&ved=0ahUKEwjszvePi_HhAhUJwFQKHV8KAS4Q_AUIECgD&biw=1600&bih=757#imgrc=uXoUOTiILaG5aM:
If you mark something which is factually wrong (because , in the case cited, the source was outside the chamber) as the "best" answer, what does that say about your grasp of the subject?

On a related note, how would people be able to use Geiger counters?
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Offline Kryptid

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Re: Do protons of the Fermilab proton beam exist?
« Reply #67 on: 29/04/2019 01:25:41 »
The Large Hadron Collider is circular in shape. The particle beams that circulate around the collider are steered with magnetic fields. That rules out the possibility of those particle beams being composed of neutral particles (so we know that they are not gamma rays).
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Offline alright1234 (OP)

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Re: Do protons of the Fermilab proton beam exist?
« Reply #68 on: 29/04/2019 19:12:02 »
Quote from: Kryptid on 27/04/2019 22:39:26
Quote from: alright1234 on 27/04/2019 21:18:04
The proton source exists within the glass bubble chamber.

The particle source is inside the cloud chambers only in some cases. The first clip I posted shows cosmic rays, which obviously came from outside of the cloud chamber.

In the case of the cloud chamber that is used to determine the existence of a proton the radioactive isotope is place within the bubble chamber.
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Offline alright1234 (OP)

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Re: Do protons of the Fermilab proton beam exist?
« Reply #69 on: 29/04/2019 19:29:12 »


Also, that photo of the Milk Way branches (that you deleted) do you have the time and location where that photo was taken since I got my planosphere at hand ready to go.
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Offline Bored chemist

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Re: Do protons of the Fermilab proton beam exist?
« Reply #70 on: 29/04/2019 19:33:25 »
Quote from: alright1234 on 29/04/2019 19:29:12


Also, that photo of the Milk Way branches (that you deleted) do you have the time and location where that photo was taken since I got my planosphere at hand ready to go.
What are you on about?
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Offline Bored chemist

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Re: Do protons of the Fermilab proton beam exist?
« Reply #71 on: 29/04/2019 19:36:51 »
Quote from: alright1234 on 29/04/2019 19:12:02
In the case of the cloud chamber that is used to determine the existence of a proton the radioactive isotope is place within the bubble chamber.
No. It isn't.
It pretty much can't be, because no radioactive material (that I know of) decays by proton emission.
Bubble chambers have to contain material - typically liquid hydrogen- at fairly high density.
But proton accelerators are always evacuated .
So there must be some sort of wall between the  proton beam source and the bubble chamber.

It really would be better if you learned more science.
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Offline Kryptid

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Re: Do protons of the Fermilab proton beam exist?
« Reply #72 on: 29/04/2019 20:52:34 »
Quote from: alright1234 on 29/04/2019 19:12:02
In the case of the cloud chamber that is used to determine the existence of a proton the radioactive isotope is place within the bubble chamber.

Bored Chemist already pointed out why this is wrong, but it is also beside the point. We know that charged particles can get through the glass and into the cloud chamber from outside. The first video I posted showed exactly that happening (there are no radioactive isotopes placed inside of the chamber in that video).
« Last Edit: 29/04/2019 20:55:37 by Kryptid »
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Offline alright1234 (OP)

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Re: Do protons of the Fermilab proton beam exist?
« Reply #73 on: 29/04/2019 21:59:30 »
Quote from: Kryptid on 29/04/2019 20:52:34
Quote from: alright1234 on 29/04/2019 19:12:02
In the case of the cloud chamber that is used to determine the existence of a proton the radioactive isotope is place within the bubble chamber.

Bored Chemist already pointed out why this is wrong, but it is also beside the point. We know that charged particles can get through the glass and into the cloud chamber from outside. The first video I posted showed exactly that happening (there are no radioactive isotopes placed inside of the chamber in that video).

The video does not show the entire experimental apparatus. This photograph clearly show the radioactive isotope within the cloud chamber.

https://www.google.com/search?q=wilson+cloud+chamber&rlz=1C1GCEA_enUS847US847&source=lnms&tbm=isch&sa=X&ved=0ahUKEwjrjqyEmfbhAhVql1QKHYl6AGQQ_AUIECgD&biw=1920&bih=937#imgrc=vJW3xGDcBapvJM:
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Offline Kryptid

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Re: Do protons of the Fermilab proton beam exist?
« Reply #74 on: 29/04/2019 22:55:42 »
Quote from: alright1234 on 29/04/2019 21:59:30
The video does not show the entire experimental apparatus.

So what? Are you now claiming that there is some kind of conspiracy among scientists to hide radioactive isotopes inside of cloud chambers? The particle trails in the cosmic ray videos don't even match what you see from chambers that have radioactive sources in them. When a radioactive source is placed in a cloud chamber, you can clearly see rays of particles radiating out away from the source. That doesn't happen in the first video I posted. Instead, the particle trails appear to pop up out of nowhere, which is exactly what you would expect to see if those particles were coming from random directions outside of the chamber.
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Offline Bored chemist

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Re: Do protons of the Fermilab proton beam exist?
« Reply #75 on: 30/04/2019 19:11:49 »
Quote from: alright1234 on 29/04/2019 21:59:30
The video does not show the entire experimental apparatus. This photograph clearly show the radioactive isotope within the cloud chamber.
Even if that was the only cloud chamber in the world, it would be irrelevant because radioactive decay practically never produces protons.

You really need to learn some science (and some common sense).

It would also help if you learned some history.
The first cloud chamber was built by a scientist trying to study weather.
The trails from radiation were an unexpected complication.

He certainly would not have included any radioactive source, so the radiation must have got in from outside.

https://en.wikipedia.org/wiki/Charles_Thomson_Rees_Wilson
« Last Edit: 30/04/2019 19:15:24 by Bored chemist »
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Offline evan_au

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Re: Do protons of the Fermilab proton beam exist?
« Reply #76 on: 30/04/2019 22:56:46 »
Quote
The video does not show the entire experimental apparatus. This photograph clearly show the radioactive isotope within the cloud chamber.
The Pierre Auger observatory in Argentina detects cosmic rays arriving from outer space; these can be protons or larger atomic nuclei.

After colliding with atoms in the atmosphere, the cosmic ray produces a shower of subatomic particles which often reaches ground level. The proton energies in some cosmic ray events are higher than can be produced in the LHC.

This observatory has opaque tanks containing water. The subatomic particles from the cosmic ray shower pass through the tank and into the water, producing Cerenkov radiation.

They don't intentionally put radioactive sources in these tanks, as this would obscure the cosmic ray measurements that they are trying to make. There are are some accidental sources of radioactivity, but this can be filtered out because they are looking for simultaneous events in many water tanks spread out over a large area.
See: https://en.wikipedia.org/wiki/Pierre_Auger_Observatory#Surface_detector_(SD)
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Offline alright1234 (OP)

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Re: Do protons of the Fermilab proton beam exist?
« Reply #77 on: 03/05/2019 18:08:32 »
Quote from: Bored chemist on 30/04/2019 19:11:49
Quote from: alright1234 on 29/04/2019 21:59:30
The video does not show the entire experimental apparatus. This photograph clearly show the radioactive isotope within the cloud chamber.
Even if that was the only cloud chamber in the world, it would be irrelevant because radioactive decay practically never produces protons.

You really need to learn some science (and some common sense).

It would also help if you learned some history.
The first cloud chamber was built by a scientist trying to study weather.
The trails from radiation were an unexpected complication.

He certainly would not have included any radioactive source, so the radiation must have got in from outside.

https://en.wikipedia.org/wiki/Charles_Thomson_Rees_Wilson

All Wilson cloud chamber experiments have the isotope within the glass enclosure of the cloud chamber to the best of my knowledge.



https://www.google.com/search?q=particle+physics+bubble+chamber+tracks&tbm=isch&tbs=rimg:CaVra76GE3-dIjgaB7_1mFmMyiLl6FDk4iC2hBTOr7Gu3ujZPCtXOUD0dX5NvmaBfiCPoTVIWk1NPETr_1mJaCfSQM4CoSCRoHv-YWYzKIEa7-LYeuQOAOKhIJuXoUOTiILaER9SJOREdfn9oqEgkFM6vsa7e6NhEfg6wASHmwPSoSCU8K1c5QPR1fEcIEJGCkhFhpKhIJk2-ZoF-II-gRQeZWY3qXID0qEglNUhaTU08ROhElYMSTBM47iCoSCf-YloJ9JAzgEQ7Ym5QMgmdu&tbo=u&sa=X&ved=2ahUKEwiCz6jNrP3hAhWCsp4KHT1BA8IQ9C96BAgBEBs&biw=1920&bih=937&dpr=1#imgrc=TVIWk1NPEToYtM: 
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Offline Bored chemist

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Re: Do protons of the Fermilab proton beam exist?
« Reply #78 on: 03/05/2019 19:06:27 »
Quote from: alright1234 on 03/05/2019 18:08:32
... to the best of my knowledge.
Then learn better.
If that was relevant, all tracks would start at the wall of the container.
They don't.
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Offline Bored chemist

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Re: Do protons of the Fermilab proton beam exist?
« Reply #79 on: 03/05/2019 19:07:27 »
BTW, we are still waiting for you to come up with a credible explanation of proton beam therapy.
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