harmonic cavity with voltage lower than radiation loss/turn
Posted: 08 Jan 2016, 08:22
Hi Michael,
Tracking in a ring seems to fail when a harmonic cavity with a voltage lower than the radiation loss per turn is included. In such a case the phase of the harmonic cavity is not well calculated by the rf_setup command. We “solve” it by putting a dummy voltage value on the rf_setup and later using the alter_element command to put the right voltage just before tracking (see attached). Could you have a look at it?
(In versions 25.1 and earlier this problem did not appear as the voltage did not have to be explicitly included in the rf_setup command)
Many thanks!
Angela
Tracking in a ring seems to fail when a harmonic cavity with a voltage lower than the radiation loss per turn is included. In such a case the phase of the harmonic cavity is not well calculated by the rf_setup command. We “solve” it by putting a dummy voltage value on the rf_setup and later using the alter_element command to put the right voltage just before tracking (see attached). Could you have a look at it?
(In versions 25.1 and earlier this problem did not appear as the voltage did not have to be explicitly included in the rf_setup command)
Many thanks!
Angela