Title: Beam Based RF Voltage Measurements and Longitudinal Beam Tomography at the Fermilab Booster,
Abstract: Increasing proton beam power on neutrino production targets is one of the
major goals of the Fermilab long term accelerator programs. In this effort, the
Fermilab 8 GeV Booster synchrotron plays a critical role for at least the next
two decades. Therefore, understanding the Booster in great detail is important
as we continue to improve its performance. For example, it is important to know
accurately the available RF power in the Booster by carrying out beam-based
measurements in order to specify the needed upgrades to the Booster RF system.
Since the Booster magnetic field is changing continuously measuring/calibrating
the RF voltage is not a trivial task. Here, we present a beam based method for
the RF voltage measurements. Data analysis is carried out using computer
programs developed in Python and MATLAB. The method presented here is
applicable to any RCS which do not have flat-bottom and flat-top in the
acceleration magnetic ramps. We have also carried out longitudinal beam
tomography at injection and extraction energies with the data used for RF
voltage measurements. Beam based RF voltage measurements and beam tomography
were never done before for the Fermilab Booster. The results from these
investigations will be very useful in future intensity upgrades.