Updated Analysis of SuperTIGER Flight Data for Galactic Cosmic-Ray Elemental Spectra

SuperTIGER (Trans-Iron Galactic Element Recorder) is a large-area, balloon-borne cosmic-ray experiment designed to measure the galactic cosmic-ray abundances of elements from Z=10 (Ne) to Z=56 (Ba) at energies from ~0.8 GeV/nuc to ~10 GeV/nuc, with the primary goal of measuring relative abundances of ultra-heavy elements above Z=30. SuperTIGER flew for a record 55 days over Antarctica in 2012-2013 and for a second flight of over 32 days in 2019-2020. Although the primary goal is measuring ultra-heavy cosmic-ray relative abundances, the SuperTIGER data analysis uses measurements of abundant elements at Z<30 for precise charge calibration extended to the ultra-heavy elements. In this technical presentation, we will report ongoing progress on analysis to obtain energy spectra for these Z<30 elements, from Ne to Cu. We will present new details of the aerogel and acrylic Cherenkov calibrations necessary for calculating energies for generating absolute spectra, including effective photoelectron resolution, knock-on electron contributions, and other background signals in the Cherenkov detectors.