Effect of the nonmonoenergetic beam on helical Cerenkov radiation

Josip Z. Soln

doi:10.1117/12.218561

8 September 1995 Effect of the nonmonoenergetic beam on helical Cerenkov radiation

Josip Z. Soln

Proceedings Volume 2557, Intense Microwave Pulses III; (1995) https://doi.org/10.1117/12.218561
Event: SPIE's 1995 International Symposium on Optical Science, Engineering, and Instrumentation, 1995, San Diego, CA, United States

Abstract

Modifications caused by the nonmonoenergetic beams to the recently described helical Cerenkov radiation (resulting from electron helical motion in a medium under the influence of magnetic field) are studied in a visible portion of the spectrum. The analysis is greatly simplified by utilizing a new analytical approximate expression for the number of emitted photons per unit path length for the usual 'monoenergetic' helical Cerenkov radiator. The effect of the nonmonoenergetic beam on the helical Cerenkov radiation is that, for the same visible frequency and the same radiation angle, the radiation may occur, in addition to through the the usual helical Cerenkov effect, also through harmonic radiation above and below the helical Cerenkov threshold. Harmonic radiators may enhance the usual helical Cerenkov radiation. For the medium of silica aerogel with the index of refraction of 1.075 and the beam energy in the 2-3 MeV range interacting with the magnetic field of about 10 tesla, one estimates that in the visible portion of the spectrum an electron from a nonmonoenergetic beam will generate between one and two photons at the end of the 10 cm interaction length.

Citation Download Citation

Josip Z. Soln "Effect of the nonmonoenergetic beam on helical Cerenkov radiation", Proc. SPIE 2557, Intense Microwave Pulses III, (8 September 1995); https://doi.org/10.1117/12.218561

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KEYWORDS

Cerenkov radiation imaging

Photons

Visible radiation

Radiation effects

Magnetism

Silica

Bessel functions

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