Effects, Determination, and Correction of Count Rate Nonlinearity in Multi-Channel Analog Electron Detectors

Abstract

Detector counting rate nonlinearity, though a known problem, is commonly ignored in the analysis of angle resolved photoemission spectroscopy where modern multichannel electron detection schemes using analog intensity scales are used. We focus on a nearly ubiquitous "inverse saturation" nonlinearity that makes the spectra falsely sharp and beautiful. These artificially enhanced spectra limit accurate quantitative analysis of the data, leading to mistaken spectral weights, Fermi energies, and peak widths. We present a method to rapidly detect and correct for this nonlinearity. This algorithm could be applicable for a wide range of nonlinear systems, beyond photoemission spectroscopy.

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Cited by in corpus (11)

• Electronic structure of quantum materials studied by angle-resolved photoemission spectroscopy
• Nodeless electron pairing in CsV${}_3$Sb${}_5$-derived kagome superconductors
• Angle-resolved photoemission spectroscopy
• New Developments in Laser-Based Photoemission Spectroscopy and its Scientific Applications: a Key Issues Review
• High Resolution Angle Resolved Photoemission with Tabletop 11eV Laser
• Deep learning-based statistical noise reduction for multidimensional spectral data
• Charge density wave-generated Fermi surfaces in NdTe${}_3$
• Vertical structure of Sb-intercalated quasifreestanding graphene on SiC(0001)
• Photoinduced changes of the chemical potential in superconducting Bi${}_2$Sr${}_2$CaCu${}_2$O${}_{8+\delta }$
• Ubiquitous suppression of the nodal coherent spectral weight in Bi-based cuprates
• Momentum-dependent scaling exponents of nodal self-energies measured in strange metal cuprates and modelled using semi-holography