Speaker
Description
A very compact Compton spectrometer, capable of measuring single-shot double-differential energy-angle gamma spectra ranging from 180 keV to 28 MeV, has recently been developed at UCLA for installation at SLAC’s FACET-II facility. Through the Compton effect, the gammas scatter electrons off a beryllium target. These electrons are then magnetically analyzed by using sextupole-like magnetic fields. To ensure an accurate reconstruction of the initial gamma spectra, the magnetic fields need to be precisely understood. To this end, we present an algorithm for an optimal statistical reconstruction of a 3D magnetic field from noisy and sparse measurements that utilizes harmonic polynomials and maximum likelihood reconstruction. We then apply this algorithm to magnetic field measurements taken for UCLA’s Compton spectrometer.
Funding Agency
Tigner Traineeship and DOE award DE-SC0024907
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