Questions tagged [synchrotron-radiation]
59 questions
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Free Electron Lasers (FEL) and limits on laser wavelength
Free Electron Lasers are based on Synchroton coherent radiation when a collimated electron beam suffers trajectory curvature due to a strong bouncing magnetic field inside an undulator.
Free Electron Lasers are currently being built that will…
lurscher
- 14,933
9
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3 answers
Do particle accelerators produce (dangerous) radiation?
I was under the impression that particle accelerators were pretty harmless, but some article said that they produce harmful radiation when you're in the tunnel. Given that the Internet... isn't always correct, is this true?
nbura
- 193
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2 answers
Converting between brilliance, intensity, and flux
This one should be a bit of a softball, but I can't find it explicitly stated anywhere on the internet, and my basic unit analysis doesn't seem to work.
Suppose you have a beam of synchrotron radiation with a brilliance $B$ at a given energy. (For…
7
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1 answer
Difference between an electron wiggler and an undulator?
Both wigglers and undulators use periodic magnetic fields applied to stored relativistic electron beams to produce intense beams of UV or X-rays that can be used in a wide range of condensed matter physics and materials science experiments.
This…
uhoh
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Does bunching reduce synchrotron radiation?
A continuous charge distribution flowing as a constant current in a closed loop doesn't radiate. Is it therefore true that as you increase the number of proton bunches in the LHC, while keeping the total charge constant, the synchrotron radiation…
John McAndrew
- 3,322
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2 answers
Does the Advanced Photon Source use electrons or positrons?
Synchrotron light sources like the Advanced Photon Source (APS) (as well as SPring-8 and the ESRF) are typically mentioned as accelerating electrons up to the GeV range to produce extremely high brilliance X-ray beams. For instance, the APS's site…
Nick T
- 861
5
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3 answers
Confusion about Cyclotron (and synchrotron) radiation
I'm not fully understanding cyclotron (and therefore synchrotron) radiation, emitted by a charge in a uniform and constant magnetic field. The charge undergoes centripetal acceleration, therefore the term $a^2$ in the Larmor formula is definitely…
RenatoRenatoRenato
- 2,602
5
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1 answer
Is "microbunching" in a free electron laser limited by the Pauli exclusion principle?
As I understand it, a free electron laser can basically be pictured as a synchrotron light source with an undulator which by the particular setup causes the electrons to self-attune so that they produce light which is both coherent and monochromatic…
Void
- 21,331
5
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2 answers
What's the difference between cyclotron radiation and synchrotron radiation?
What's the difference between cyclotron radiation and synchrotron radiation? The title says it. If there is a difference between a cyclotron and a synchrotron beyond the particles being accelerated in bunches, please clarify. Is bremsstrahlung a…
user40753
4
votes
2 answers
Is accelerating charges only way to produce EM radiation? What about gamma from nucleus?
Is accelerating charges the only way to produce EM radiation?
What about gamma radiation emitted from the nucleus of an atom? Does that count as accelerating charges? How?
Are there other ways of producing EM radiation? Or are these the only two…
Errol Hunt
- 1,146
4
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2 answers
Conceptually speaking, why does synchrotron radiation arise?
First, a bit of background. I'm a chemist who works with synchrotron-based techniques, but I'm focussed on materials analysis rather than synchrotron physics.
I'm struggling to work out where synchrotron radiation (SR) actually comes from. Why does…
3
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4 answers
Physical interpretation of relativistic synchrotron radiation
When an electron approaches the speed of light, the emission pattern is sharply collimated forward, in the direction of motion. I can see how this is mathematically true from taking the relativistic limit of the angular distribution of the radiated…
ejk
- 33
3
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0 answers
Circular vs Sinusoidal Cyclotron Radiation
Why is the wavelength of circular cyclotron radiation different than that emitted by a non-relativistic electron passing through an undulator?
From what I understand, the wavelength of circular cyclotron radiation (for electrons) is dependent only…
James
- 419
3
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5 answers
The use of electrons in synchrotrons
I'm researching synchrotrons for a class project, but I can't seem to find a decent answer to one of my questions. It appears that most synchrotrons use electrons as opposed to some other charged particle, while the Large Hadron Collider uses…
Hannah
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3
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Is there an orbit decay associated with synchrotron radiation of a relativistic particle?
I had a question about a particle (say a proton) with relativistic energies interacts with a magnetic field (in the z direction). As it is accelerates the particle emits synchrotron radiation. Naturally I assume that this emission of photons reduces…
