Figure 2
Measured spectra of the third harmonic (a) and the fifth harmonic (b) spontaneous emission at gu = 87.8 mm (K = 4.10) and gd = 120 mm. Compact spectrometers with resolutions of 0.83 and 0.24 nm were used in (a) and (b), respectively. The electron beam current in a single-bunch operation was 1.6 mA in (a) and 0.9 mA in (b). |