Bochum 1998 – scientific programme

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HK: Hadronen und Kerne

HK 4: Electromagnetic Probes I, Photoproduction

HK 4.4: Talk

Monday, March 16, 1998, 15:30–15:45, B

Measurement of the degree of linear polarization of collimated coherent bremsstrahlung [1] — •F. Rambo — II. Physikalisches Institut, Universit"at G"ottingen

Coherent bremsstrahlung in combination with photon tagging is used as a source of linearly polarized photons at the Mainz Microtron (MAMI). If the photon beam is collimated an increase of the degree of linear polarization is expected. Practical applications of this favourable property require both a detailed quantitative experimental [2] and theoretical [3] investigation. In the present contribution we will report on measurements of the degree of linear polarization of collimated coherent bremsstrahlung that took place at MAMI in 1995/96. The photon spectrometer TAPS has been used to detect the decay photons from coherent π^∘-photoproduction on ⁴He which has been exploited as the analysing reaction.

[1] Supported by BMBF and SFB201

[2] A. Kraus et al., Phys. Rev. Lett. (accepted)

[3] F. Rambo et al. (to be published)