Questions tagged [cherenkov-radiation]
the electromagnetic shock-wave due to a charged particle traveling through a medium faster than the speed of light in that medium.
67
questions
1
vote
1
answer
36
views
Cherenkov radiation in glass via electron tube?
Recently I was experimenting with an vacuum tube attached to a wimshurst machine and measuring the X-Rays emissions. While doing so, I noticed the the surface of the tube began to glow blue in some ...
2
votes
0
answers
37
views
Derive Cherenkov radiation using four momentum
In vacuum, it is not possible for an electron to emit a single photon. That can be proved by using 4-momentum.
(Let $ c = 1 $)
Initially,
$$
P_e^{\mu}=\left(E_e, \mathbf{p}_e\right)
$$
Finally,
$$P_e^...
- 79
2
votes
0
answers
41
views
How does Cherenkov radiation destructively interferes and leaves only a radiation over a beamed cone?
I'm trying to understand the observations in IceCube Neutrino Observatory where they observe the Cherenkov radiation emitted by a charged particle in the ice. I know that applying the Huygens ...
1
vote
1
answer
40
views
A way to distinguish the scintillation light from the Cherenkov radiation
I am using a scintillator-PMT ov scintillator-SiPM system.
When I obtain signals from the system, I will get both scintillation photons and Cherenkov radiation in my DAQ. Is there a way to distinguish ...
0
votes
1
answer
18
views
Is it instantaneous for an unpolarized molecule to get polarized by a very fast particle & get unpolarized by emitting photon? Or is there a time gap?
The question is in the context of Cerenkov radiation, where a coherent wavefront is formed when a particle which is moving faster than speed of light in a dielectric medium, (v>c/n, where n is ...
1
vote
0
answers
33
views
Cherenkov radiation, why is there a linear dependence on frequency in the spectrum?
My understanding is that Cherenkov radiation is the result of a charged particle moving faster than the speed of light in a medium. This causes a shock wave where light emitted from electrons vibrated ...
- 143
2
votes
0
answers
26
views
Number of photons per unit time produced from Cherenkov radiation
I am trying to create cherenkov radiation with radioactive source, I understand how to calculate the number of photons per unit lengh per unit wavelengh produced in a cherenkov radiation using the ...
- 533
2
votes
1
answer
50
views
Producing cherenkov radiation using radioactive source
I want to produce cherenkov radiation by transpering $\beta$ particles through a dialectric media. To do this , I will use a radioactive decay as a source for the $\beta$ particles, The thing that ...
- 533
0
votes
1
answer
82
views
Cherenkov radiation momentum approximation question
I am stuck a bit on a question to do with Cherenkov radiation.
The requirement stated for Cherenkov radiation to occur is that the charged particle travels at a velocity greater than light in the ...
- 124
0
votes
1
answer
55
views
How do electrons escape nuclear reactors to cause Cherenkov radiation?
From what I understand, nuclear reactor cores are shielded, so that gamma rays don't get too far too often. But since electrons are expected to penetrate less material, then how are underwater nuclear ...
- 3
1
vote
0
answers
69
views
Silly doubt on Cherenkov radiation and QFT
Firstly, consider the casimir effect. A interesting feature of this effect is that an attractive force appears which is generated by negative energy. This attractive force arises because the ...
- 2,841
1
vote
0
answers
64
views
Two questions about Sonoluminescence in water: Does it produce Cherenkov radiation? Could be done with a laser beam instead of sound?
Two questions about Sonoluminescence in water:
Does Sonoluminescence in water produce Cherenkov radiation when the bubble is collapsing?
Could be made the same collapsing bubbles but instead of using ...
- 97
0
votes
1
answer
106
views
Cherenkov Radiation: Does it need to be faster than light in the certain medium?
I understand that when a charged particle moves through a medium and excites the atoms nearby, it produces a blue light when the atoms 'de-excite"
However, I don't understand why it has to be ...
- 1
1
vote
1
answer
95
views
Vacuum Cherenkov Radiation
Hi I was reading this paper (Pair Creation Constrains Superluminal Neutrino Propagation) for an assignment and I came across the following question:
in the article, it is said that if we assume that ...
0
votes
1
answer
70
views
Why there is de-excitation time for an atom after it gets excited by beta particles moving faster than light
I have not found the time for de-excitation of an electron when they are excited by the beta particles moving faster than the speed of light in the medium (water, glass etc) or the emission of ...
0
votes
0
answers
37
views
Formalizing the Askar'yan Effect
Wikipedia defines the Askar'yan Effect as...
[The] Askaryan effect is the phenomenon whereby a particle traveling faster than the phase velocity of light in a dense dielectric... produces a shower of ...
- 989
4
votes
1
answer
618
views
What is the mechanism of the Askaryan effect?
(Quoted largely from Wikipedia): Askaryan radiation, known otherwise as the Askaryan effect, is a phenomenon which occurs when a particle traveling faster than the phase velocity of light in a dense ...
- 989
2
votes
0
answers
29
views
What wavelengths of light do occur in reverse Cherenkov radiations?
Cherenkov radiation works much like a sonic boom, where a particle faster than light in that medium produces shorter wavelengths of light when passing through it (blue). According to the same article, ...
- 333
5
votes
2
answers
109
views
Cherenkov light rings instead of solid circles?
Let's suppose a muon emits Cherenkov light while travelling in a medium along a straight line. Let's suppose the motion is perpendicular to a wall which is instrumented with photomultipliers.
Question:...
- 535
0
votes
3
answers
88
views
What does 'low-velocity' Cherenkov radiation look like?
If an electron is traveling less than the speed of light, does it produce any light? At any wavelength?
I just thought about this after reading about the attempt(s) to detect very low-energy ...
- 4,225
0
votes
2
answers
298
views
Would Cherenkov radiation be observed in Uranium glass?
I recently read about Cherenkov Radiation and the neat blue glow it creates in underwater nuclear reactors, and my understanding of it is that it occurs due to particles ($\beta$ particles in the case ...
- 185
4
votes
1
answer
193
views
What is the source of light in Cherenkov radiation?
When charged particle inside a media moves faster than the speed of light of that media, a faint bluish glow is observed which we call as "Cherenkov radiation". It is a very common scenario in nuclear ...
- 507
2
votes
3
answers
516
views
Can an object move faster than the speed of light in a medium? [duplicate]
In water the speed of light changes to $2.25 \cdot 10^8m/s$. Can a electron travel faster/travel at the same speed in water. I don't see any violation of SR. So shouldn't it be possible for an ...
- 1,297
0
votes
1
answer
241
views
Is there naturally-occurring Cherenkov Radiation on Earth?
I'm postulating a natural fission reactor, like Oklo in Gabon. My understanding of Oklo is that the reaction occurred entirely underground. Would it be possible for a Uranium deposit nearer the ...
- 103
2
votes
1
answer
405
views
COMSOL Cherenkov radiation
As indicated in the title of the discussion, I would like to know if it would be possible to simulate through software based on the finite element method COMSOL Multiphysics the movement of a particle ...
2
votes
1
answer
178
views
In regards to the hypothetical Alcubierre Drive (hear me out), are energy costs consumed immediately, or during transit?
I am aware the Alcubierre Drive is highly hypothetical and likely cannot exist. However, there are significant quantities of research material into Warp Drives of many types, and presumably the answer ...
- 103
1
vote
0
answers
151
views
Is the speed of light universal for all mediums? [duplicate]
We know that the speed of light is constant in a vacuum and has the value c= 3× 10^8 m/s.
But in a medium such as glass(refractive index=1.5) the speed of light is 2× 10^8 m/s. Now considering the ...
- 141
0
votes
1
answer
63
views
Intensity of the cherenkov radiation of tritiated water
Assuming that I have a large quantity of tritium oxide (T2O), or 100% tritiated water, how luminous would it be due to Cherenkov radiation? What color would it be to the human eye, and how much of it ...
- 143
1
vote
1
answer
509
views
Cherenkov light reverse cone direction
The Cherenkov cone is emitted along the charged particle direction as many textbooks say.
Detectors like Super-Kamiokande can detect those cerenkov rings and tag the particle as a muon-like ...
- 15
2
votes
0
answers
102
views
Cherenkov Radiation Spectra
I've been looking into the Cherenkov effect recently and in particular I've been trying to plot an approximation of the spectra for photons emitted by it. However, I seem to run into a couple ...
- 121
1
vote
0
answers
61
views
Cherenkov radiation relativistic correction
I have to write a paper on Cherenkov detection.
And got a bit of an issue on the relativistic particle/recoil correction of the Cherenkov angle formula.
Normaly $$cos( \theta_c) = \frac{1}{n\beta} $$...
3
votes
1
answer
363
views
Cherenkov light and refractive index
LHCb’s Ring Imaging CHerenkov detector (RICH) is aimed at telling different charged particles apart by measuring their velocity, which, together with an independent measurement of their momentum, is ...
- 1,157
0
votes
2
answers
129
views
Minimal frequency for Cherenkov radiation
I'm trying to figure out the possible range of frequencies of the photons emitted in the Cherenkov effect, and came across something strange:
If I assume that the emitting electron's initial energy ...
- 333
-1
votes
3
answers
462
views
What is Cherenkov radiation? [duplicate]
What is Cherenkov radiation? I came across this concept when I was learning SR.
Why can't particles moving at speed of excess of speed of light in the medium. Why it does not violate the limitation ...
user221098
3
votes
2
answers
696
views
Why only charged particles can emit Cherenkov in glass (and Neutrinos themselves not)
I have read this:
https://en.wikipedia.org/wiki/Cherenkov_radiation
https://en.wikipedia.org/wiki/Measurements_of_neutrino_speed
https://en.wikipedia.org/wiki/Neutrino
We know that neutrinos ...
- 27.4k
3
votes
2
answers
300
views
Do massless particles create tiny gravity-booms?
So just a precursor, my main focus is math and I don't fully understand everything in physics so I apologize if this has an obvious answer or the wrong tags are used.
That being said, I do know that ...
- 139
2
votes
2
answers
364
views
Is it possible to create anti-muons in a particle accelerator?
I love particle and nuclear physics and I'm starting to search some things about it even. So, my doubt is: is it possible to create antimuons (positive charged muons) in a particle accelerator, but ...
- 43
6
votes
0
answers
311
views
Trouble with Classical Derivation of Cherenkov Radiation Mechanism -- Magnetic Field Intensity
I've been going through a translation of Frank and Tamm's original theory on Cherenkov radiation published by Jelley in 1958, and the bottom line is that I'm stuck on one of the intuitive leaps that ...
- 175
0
votes
2
answers
168
views
Cherenkov radiation in non-water solvents
Will we see or can we measure Cherenkov radiation in media different from pure water?
It is well known that Cherenkov radiation is observable by bare eye in nuclear pools. But if we replace water ...
- 513
0
votes
2
answers
378
views
Faster than light in a medium [duplicate]
It is a remarkable well-stablished fact that the light velocity in vacuum, $c \simeq 3.10^8 m/s$ is the upper limit for the velocity of ordinary matter, never to be achieved.
It is also well-...
- 631
0
votes
1
answer
131
views
How is the energy of a particle measured in a Cherenkov detector [closed]
I don't understand how is the energy measured in a cherenkov detector. How is the number of photons radiated related to the energy of the particle or the measure of energy has nothing to do with the ...
- 3
1
vote
0
answers
56
views
Can a particle be identified when one knows $\left<dE/dx\right>$ and the Cherenkov angle $\theta_c$?
I have a question about if it would be possible to identify a particle by measuring the energy loss due to ionization $\langle dE/dx\rangle$ and the Cherenkov angle $\theta_c$. I assume that we know ...
- 1,575
2
votes
2
answers
1k
views
Cherenkov radiation
Cherenkov radiation is electromagnetic radiation emitted when a charged particle passes through a dielectric medium at a speed greater than the phase velocity of light in that medium.
Neutrons are ...
- 1,649
0
votes
1
answer
2k
views
Which has better reflective properties? Aluminum oxide or Titanium dioxide?
I know TiO2 reflects better than Al2O3 but I can't understand why, in most radiation detection applications using scintillation, aluminum oxide is used as a reflective coating more than titanium ...
- 325
1
vote
0
answers
104
views
Cherenkov radiation in Schwarzschild metrics
As we know, a particle radiate if it's velocity greather then the speed of light in media (Cherenkov radiation). Also, we know the Schwarzschild metric acts on electromagnetic fields like media with $\...
- 2,485
2
votes
1
answer
236
views
Could we travel faster than the speed of light in a medium, but slower than the speed of light in vacuum? [duplicate]
It is well accepted that nothing with mass can travel at the speed of light in vacuum, $c$. Now let's say that a light wave is traveling through a medium that slows the wave's speed significantly (...
- 163
1
vote
1
answer
56
views
Using a Ring Imaging Cherenkov (RICH) detector
I'm not clear on how RICH (Ring Imaging Cherenkov) detectors identify particles, as much as I've tried to read up on it. So they measure the angle Cherenkov light is emitted at, which is related to ...
- 979
3
votes
1
answer
1k
views
How does particle speed affect Cherenkov radiation?
Cherenkov radiation is created by the movement of particles through a substance at speeds exceeding that of light.
I heard an analogy that it is essentially a sonic boom but with light instead of ...
- 2,303
7
votes
3
answers
4k
views
Why is Cherenkov Radiation faint blue in colour?
In 1934, Cherenkov discovered that electrons moving with large constant velocities through polarizable media caused a faint bluish glow. 'Why is the radiation blue in colour? How can a charged body ...
- 101
0
votes
1
answer
179
views
Can something go faster than the speed of light in a medium? [duplicate]
Since some mediums have an index of refraction more than 1, light goes slower than in a vacuum. Does this mean it is possible for particles to go faster than the speed of light in these mediums? If so,...
- 661