| Autor: |
Shkvarunets, A. G., Fiorito, R. B. |
| Předmět: |
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| Zdroj: |
AIP Conference Proceedings; 2004, Vol. 732 Issue 1, p429-436, 8p |
| Abstrakt: |
In accelerators such as storage rings, energy recovery linacs (ERLs), and free electron lasers, bending magnets are used to alter the trajectory of a relativistic electron beam. Frequently the magnets are arranged in pairs in either a “U” or “S” configuration with an intervening straight section. In such configurations synchrotron radiation (SR) or edge radiation (ER) is produced in the bend and/or as the beam exits the field of each magnetic field region. Under certain conditions the radiation is produced in the visible region of the spectrum. The radiation from the second magnet can interfere with that of the first magnet, when a distance comparable to the coherence length of the radiation separates the two magnetic fields. For a beam with low energy spread, the visibility of the interference radiation depends on the beam divergence. To design a sensitive beam divergence diagnostic we have developed a computer code, which can calculate the far field radiation distribution produced by a relativistic electron moving along any trajectory in a magnetic field. The code model is based on the “colliding electron” approximation and reproduces all known features of SR and ER. The code can account for the spatial field distribution of the dipole magnet, the effect of beam divergence and the bandwidth of the measurement. Results of our calculations are presented for the 1.9-GeV Cornell Electron Storage Ring and the 100-MeV ERL at the Thomas Jefferson National Laboratory Free Electron Laser. © 2004 American Institute of Physics [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
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