Beams Document 5762-v1

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Beam based RF voltage measurements and Longitudinal beam tomography at the Fermilab Booster for Intensity Upgrade

Document #:
Beams-doc-5762-v1
Document type:
Talk
Submitted by:
Chandrashekhara M. Bhat
Updated by:
Chandrashekhara M. Bhat
Document Created:
04 Aug 2017, 10:38
Contents Revised:
04 Aug 2017, 10:38
Metadata Revised:
04 Aug 2017, 10:38
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Abstract:
The required accelerating RF voltage during PIP-II era will need to be about 30% more than during the PIP era. Therefore, it is extremely important to find out the current RF voltage by carrying out beam-based measurements to specify the needed upgrades to the Booster RF system. During the beam cycle the magnetic field is changing all the time. Due to this, 1) measuring/calibrating the RF voltage used for beam capture and acceleration, 2) longitudinal beam tomography, are not trivial tasks. Here we present a method to accomplish both tasks near injection and extraction energies of the Booster. Python/Matlab programs* have been developed which use wall current monitor data to measure synchrotron frequencies and extract the RF voltage with an accuracy of ~3%. We have also attempted to obtain the beam tomography in the longitudinal phase space using these data. The method developed here is applicable to any similar RCSs in the world.
Files in Document:
  • pdf (DPF2017-cbhat-TALK-Beams-Doc.pdf, 2.9 MB)
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