Momentum compaction factor is reduced by negative dispersion in the centre bends of the TBA arcs in order to provide bunches of about 8 ps rms at a beam current of 50 mA. Some positive dispersion in the short and medium straights was required for matching. Sextupole family SE was switched off to get the lowest possible value of alpha-2. Also see PAC 2009 conference report.
| Circumference [m] | 288.0073 |
| Working Point Qx / Qy | 19.41 / 10.73 |
| Natural chromaticities | -58.4 / -19.9 |
| Corrected chromaticities | +1 / +1 |
| Momentum compaction factor | 5.1E-5 |
| Horizontal emittance at 2.4 GeV [nm rad] | 13.4 |
| rms relative energy spread at 2.4 GeV | 8.64E-4 |
| Energy loss per turn (no IDs) [keV] | 567 (incl. W138 + U19) |
| Short straight: Beta_x / Beta_y / Disp [m] | 0.76 / 4.10 / 0.04 |
| Medium straight: Beta_x / Beta_y / Disp [m] | 1.87 / 9.05 / 0.04 |
| Long straight: Beta_x / Beta_y / Disp [m] | 11.4 / 5.00 / 0.00 |
| FEMTO radiator: Beta_x / Beta_y / Disp [m] | 13.1 / 0.57 / 0.00 (alfa_x = -2.2) |
| Maximum values: Beta_x / Beta_y / Disp [m] | 25.5 / 16.3 / 0.32 |
ISO9B Lattice file for OPA.