J. Esberg

Experimental investigations of synchrotron radiation at the onset of the quantum regime

The classical description of synchrotron radiation fails at large Lorentz factors,

Does experiment show that beamstrahlung theory – strong field QED – can be trusted?

\gamma

Distorted Coulomb field of the scattered electron

, for relativistic electrons crossing strong transverse magnetic fields

Direct Measurement of the Formation Length of Photons

B

Restricted energy loss of ultrarelativistic particles in thin targets - A search for deviations from constancy

. In the rest frame of the electron this field is comparable to the so-called critical field

On the macroscopic formation length for GeV photons

B_0 = 4.414\cdot10^9

Radiation emission as a virtually exact realization of Heisenbergs microscope

T. For

Strong field processes in beam-beam interactions at the Compact Linear Collider

\chi = \gamma B/B_0 \simeq 1

Proof of the nonexistence of a linear solution for the CR2 injection region of the CLIC drive beam

quantum corrections are essential for the description of synchrotron radiation to conserve energy. With electrons of energies 10-150 GeV penetrating a germanium single crystal along the