Questions tagged [synchrotron-radiation]

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Synchrotron radiation for protons

I know that due to the huge mass difference and dependence of radiated energy on mass, protons lose much less energy in synchrotrons than electrons. Can someone tell me how to calculate the energy ...
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Are Bremsstrahlung and the Unruh effect equivalent?

This paper argues that the absorption and emission rates from and to the thermal Unruh bath of a proton viewed in a coaccelerated frame is equal to the emission rated viewed from an inertial observer. ...
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Origin of the energy distribution of synchrotron radiation

Is there an easy explanation why synchrotron radiation from a bending magnet (e.g. in an electron storage ring) has an energy distribution? In other words, given a specific magnet with a defined ...
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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 ...
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Synchrotron Radiation for Electrons, Protons and Ions

I understand the principle of synchrotron radiation in saying that , when a charged particle gyrates around some magnetic field line it emits energy in the form of photons. However I can't ...
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How is current in superconductors increased microscopically?

Imagine a superconductive ring with its current being increased by EM induction. How is current increased microscopically? I see only two possibilities: ...
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2answers
72 views

Alternative way of bending electrons trajectory in synchrotron

I read that in synchrotron, the X-ray is produced whenever the electrons undergo acceleration, in particular at the bending magnet, the wiggler or undulator. Since these three devices all employ ...
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1answer
148 views

Why particles are going clockwise in most synchrotrons?

First I'm sorry for my poor choice of words, I'm not into physics so I'm lacking of appropriate words. I'm doing some personal research on synchrotrons, synchrotron radiation and all that stuff. It ...
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Interpretation of synchroton radiation formula

I'm asked to interpret the formula of the power of synchrotron radiation per solid angle for a single point charge in an uniform circular motion: $$ \frac{\partial P}{\partial \Omega}=\frac{q^2 a^2}{...
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510 views

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 ...
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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 ...
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1answer
40 views

Why does an positive absorbtion coefficient imply impossibility of population inversion?

In "Radiative Processes in Astrophysics" from Rybicki and Lightman there is a chapter called "6.9 The impossibility of a synchrotron maser in vacuum": They prove that there can not be a synchrotron ...
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Why synchrotron uses RF field and not static field to accelerate electrons? [duplicate]

In synchrotrons electrons lose energy while emitting light so accelerating fields are used to boost up their speed back to >99% of light speed. Why RF (time varying) fields are used for accelerating ...
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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 ...
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131 views

free electron laser. Reference?

Where can I find a comparison graph of the peak power of free electron lasers and synchrotrons ?
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122 views

How do accelerated ions with remaining electrons in the shell produce synchrotron radiation?

Since ions are charged, they should produce synchrotron radiation in an accelerator. I am interested the characteristics of the emitted radiation when there are still electrons in the ion's shell (not ...
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1answer
148 views

Tabletop Synchrotron

When I was undergraduate student I asked to my proffesor why nobody has made a synchrotron machine with a superconducting circular wire and magnetic field to accelerate electrons properly and to ...
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330 views

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 ...
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564 views

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 ...
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111 views

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. ...
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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 ...
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Where does the factor of $\gamma^2$ come from in synchrotron radiation?

I've read the derivation for synchrotron radiation (as derived by Griffiths), so I know how to get it given the retarded potentials, etc. I'm having a hard time with intuition. The derivation in ...
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Synchrotron radiation and special relativity

My questions below are for all those who assume the point-like electron of special relativity, that strange entity with no inner structure (!), but with intrinsic (?) rest energy, magnetic moment and ...
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Emission and absorption of photons by electrons [closed]

Two questions occur at a critical review of the two famous experiments devised by Millikan in 1914, respectively Duane, Hunt and others in 1917-1920, which confirmed the action constant calculated by ...
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125 views

Why is the storage ring of a synchrotron a vacuum?

Why is the storage ring of a synchrotron a vacuum? I know that when the accelerated particles get to the storage ring they lose energy, releasing synchrotron radiation, but how does the vacuum make ...
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242 views

Does a superconductor spinning in a magnetic field radiate?

According to the cyclotron radiation formula: $$ \frac{dE}{dt} = - \frac{\sigma_t B^2 V^2}{c \mu_0 }$$ charges will radiate even when moving perpendicular to the magnetic field (which presumably ...
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2answers
515 views

Kinetic energy of an electron in synchrotron

The question states as follows: An electron is accelerated in a LINAC (LINear Accelerator) so that it's kinetic energy is 1.00 GeV. Then it is transferred to a synchrotron where it's energy (didn't ...
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407 views

Do atoms produce synchrotron radiation?

Since synchrotron radiation is created when charged particles are radially accelerated and electrons are definitely orbiting a nucleus (assuming a Bohr model), electron should then logically emit ...
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215 views

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 ...
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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 ...
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2answers
436 views

Electron energy in a synchrotron storage ring vs. X-ray energy from the wiggler: why is the latter much lower?

I know in large synchrotron facilities some beamlines produce very intense X-rays by injecting the accelerated electrons into "wigglers". I have read that the typical energy of the electrons in the ...
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4k views

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 ...
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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 ...
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196 views

Is synchrotron radiation considered incandescent?

Synchrotron radiation is produced via the acceleration of charged particles, much like incandescence. However, all information I've seen state that incandescent light is produced exclusively from the ...
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The Synchrotron at Caltech

In the Feynman Lectures Vol. 1, it says that the Synchrotron at the California Institute of Technology is capable of producing electromagnetic Radiations with a frequency of $10^{24}$ cycles per ...
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How do I rearrange dE/dt to find an electron's 'half-life' due to synchrotron radiation?

I know that $-\frac{\mathrm{d}E}{\mathrm{d}t} \propto E^2$ for an electron losing energy to synchrotron radiation, but I can't find how to arrange this to give the time it would take for the electron ...
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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 ...
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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 ...