27-10-2012, 11:59 AM
Energy Loss Estimates at Several Beam Intensities in the Fermilab Booster
ABSTRACT
The difference between the effective rf voltage and the accelerating voltage required to match the rate of change of the
Booster magnetic field can be used to estimate the energy loss per beam turn. Although the effective rf voltage (RFSUM) and
the synchronous phase can be experimentally measured and used to calculate the accelerating voltage, the calibration of the
signals during the fast change of the Booster rf frequency is difficult and appears to introduce some offset to the beam energy
loss estimation. An observed linear relationship between energy loss and beam intensity is used to evaluate the offset, which
is then applied to the experimental data. This approach, rather than recalibrating the signals, is simple and suitable for
minimizing the error in the data.