{"doi":"10.1143/jjap.32.1290","title":"Spherical and Chromatic Aberration Correction using Aperture Lens  -Computer Simulation-","abstract":"<jats:p> \n   The electron trajectories from a Pierce-type electron gun are calculated. The aperture lens which is formed by an anode hole acts as a concave lens and produces negative-sign spherical and chromatic aberrations. The negative-sign focal length which is calculated by the trajectories coincides with the value calculated by the formula derived by Davisson and Calbick 60 years ago. For an electrode of practical size, the negative-sign spherical and chromatic aberration coefficients are on the order of 10<jats:sup>0</jats:sup> to 10<jats:sup>2</jats:sup> m and of 10<jats:sup>-3</jats:sup> to 10<jats:sup>-1</jats:sup> m, respectively. It is shown that when the electron beam from this type of electron gun is focused by a magnetic lens, most of the spherical aberration is compensated. These aperture lenses are expected to improve the characteristics of the charged particle beam systems. \n </jats:p>","journal":"Japanese Journal of Applied Physics","year":1993,"id":22278,"datarank":0.10397207708399181,"base_score":0.6931471805599453,"endowment":0.6931471805599453,"self_citation_contribution":0.10397207708399181,"citation_network_contribution":0.0,"self_endowment_contribution":0.10397207708399181,"citer_contribution":0.0,"corpus_percentile":null,"corpus_rank":null,"citation_count":1,"citer_count":0,"citers_with_citation_signal":0,"citers_with_endowment":0,"datacite_reuse_total":0,"is_dataset":false,"is_dataset_confidence":null,"is_data_producer":false,"deposit_databanks":null,"is_oa":false,"file_count":0,"downloads":0,"has_version_chain":false,"published_date":null,"fair_score":null,"fair_percentile":null,"algorithm_id":"datarank_citation_only_1hop_v6","ranking_scope":"data_only","authors":[{"id":136813,"name":"Hiroyasu Shimizu Hiroyasu Shimizu","orcid":null,"position":1,"is_corresponding":false},{"id":136812,"name":"Mamoru Nakasuji Mamoru Nakasuji","orcid":null,"position":0,"is_corresponding":false}],"reference_count":0,"raw_metadata":{"has_enrichment":true,"base_score":0.6931471805599453,"endowment":0.6931471805599453,"datacite_reuse_total":0,"file_count":0,"downloads":0,"views":0,"has_version_chain":false,"is_dataset":false,"is_oa":false,"pmid":"21071399","pmcid":null,"openalex_id":"https://openalex.org/W2069605835","authors":[],"funders":[],"total_grants":0,"fwci":0.3879,"citation_percentile":0.58718104,"influential_citations":0,"citation_trend":[],"oa_status":"closed","license":"https://iopscience.iop.org/info/page/text-and-data-mining","oa_locations":[{"url":"https://iopscience.iop.org/article/10.1143/JJAP.32.1290","host_type":"publisher"},{"url":"https://iopscience.iop.org/article/10.1143/JJAP.32.1290/pdf","host_type":"publisher"},{"url":"https://doi.org/10.1143/jjap.32.1290","host_type":"journal"}],"fields_of_study":["Electron and X-Ray Spectroscopy Techniques","Advancements in Photolithography Techniques","Photocathodes and Microchannel Plates","Physics"],"mesh_terms":[],"keywords":["Chromatic aberration","Spherical aberration","Optics","Lens (geology)","Aperture (computer memory)","Physics","Sign (mathematics)","Electrostatic lens","Chromatic scale","Magnetic lens","Focal length","Cathode ray","Anode","Electron","Electron optics","Beam (structure)","Electrode","Mathematics","Quantum mechanics"],"sdg_mappings":[],"linked_datasets":[],"clinical_trials":[],"software_tools":[],"database_accessions":[],"source":"live","citation_network_status":"fetched"},"created_at":"2026-06-06T18:31:56.784745Z","pmid":null,"pmcid":null,"fwci":null,"citation_percentile":null,"influential_citations":0,"oa_status":null,"license":null,"views":0,"total_file_size_bytes":0,"version_count":0,"fair_f":null,"fair_a":null,"fair_i":null,"fair_r":null,"fair_zscore":null,"fair_rationale":null,"fair_model":null,"fair_agent_version":null,"fair_fulltext_source":null,"fair_has_llm":null,"fair_computed_at":null,"clinical_trials":[],"software_tools":[],"db_accessions":[],"linked_datasets":[],"topics":[]}