Two main operation modes are expected : the multibunch mode (~ 416 bunches) and the temporal structure mode (8 bunches).
The bunches are separated by 140 ns.
The table below resumes the lifetime in the 2 main operation modes at 2.75 GeV.
| εx (nm.rad)
| 3.7 |
| | Multibunch mode | Temporal structure |
| I (mA) | 500 | 8 x 10 |
| τv1/e(h)
| 24 | 132 |
| | K2 | | |
τT1/2. τt1/e (h) | 0.01
| 27 ; 15 | |
| 0.10 | |
17* ; 21 |
Remarks:
τ v1/e (h) is the vacuum lifetime calculated with an average pressure at 10-9 mbar for 500 mA and 5.10-10 mbar for
8x10 mA, defined as the time after that the beam intensity is decreased by a factor of 1/e.
τ T1/2 is the Touschek lifetime, defined as the time after that the beam intensity is decreased by a factor of 2.
t t is the lifetime due to both preceding effects, defined by a factor 1/e.
* At zero chromaticity and 25 ps bunch length
