Event Title

A 3D Hall Probe Calibration

Advisor(s)

Dr. Thomas Strauss, Fermilab

Location

Room A119

Start Date

26-4-2019 10:45 AM

End Date

26-4-2019 11:00 AM

Abstract

The Fermilab Mu2e experiment seeks to investigate the decay of muons into electrons. The experiment uses several superconducting magnets to create a complex magnetic field to transport the muons from their production point to the decay target, where several detectors will analyze the decay products. To correctly identify the particle tracks, a high precision map of the magnetic field is required to obtain the momentum distribution of decay particles and understand locations of potential magnetic traps that could contribute to the number of background events. The field map requirements demand a precision of the map of 10-4 Tesla. Thus, precision 3D Hall probes are used and need to be checked for their accuracy. As these probes are usually only precise to a 10-4 Tesla within a limited temperature range, they might need to be re-calibrated. In our project, we developed tools to create a multidimensional fit to interpolate the Hall probe readings between obtained calibration data points; variables include probe orientation, ambient temperature, and current magnetic field. We will describe the progress and final results of this work.

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Apr 26th, 10:45 AM Apr 26th, 11:00 AM

A 3D Hall Probe Calibration

Room A119

The Fermilab Mu2e experiment seeks to investigate the decay of muons into electrons. The experiment uses several superconducting magnets to create a complex magnetic field to transport the muons from their production point to the decay target, where several detectors will analyze the decay products. To correctly identify the particle tracks, a high precision map of the magnetic field is required to obtain the momentum distribution of decay particles and understand locations of potential magnetic traps that could contribute to the number of background events. The field map requirements demand a precision of the map of 10-4 Tesla. Thus, precision 3D Hall probes are used and need to be checked for their accuracy. As these probes are usually only precise to a 10-4 Tesla within a limited temperature range, they might need to be re-calibrated. In our project, we developed tools to create a multidimensional fit to interpolate the Hall probe readings between obtained calibration data points; variables include probe orientation, ambient temperature, and current magnetic field. We will describe the progress and final results of this work.