{'fraction_non_alphanumeric': 0.022900763358778626, 'fraction_numerical': 0.0021810250817884407, 'mean_word_length': 5.6521739130434785, 'pattern_counts': {'":': 0, '<': 0, '<?xml version=': 0, '>': 0, 'https://': 0, 'lorem ipsum': 0, 'www.': 0, 'xml': 0}, 'pii_count': 0, 'substrings_counts': 0, 'word_list_counts': {'cursed_substrings.json': 0, 'profanity_word_list.json': 0, 'sexual_word_list.json': 0, 'zh_pornsignals.json': 0}}
In-situ determination of the transformer core's magnetization characteristics on HT-7 superconducting Tokamak

As a complex physics system, the tokamak plasma is strongly coupled with external poloidal fields, which are defined by electromagnetic circuits. For the HT-7 device with an iron core, the transformer magnetization plays the most important role. With a reasonable two-dimensional magnetizing current filament model, the magnetization curve was numerically derived from in-situ external magnetic experimental data detected by flux loops and small pick-up coils. To solve the ill-posed inverse problem, singular value decomposition scheme and iterative procedures were used and proved to be effective. This provides a practical solution for in-situ determination of the transformer's magnetization characteristics. It paves the way for tokamak experiment prediction and plasma current profile reconstruction.