%0 Journal Article
%T THE ABERRATION THEORY OF A COMBINED MAGNETIC ROUND LENS AND SEXTUPOLES SYSTEM<br>磁圆形透镜和磁六极透镜的复合系统的象差
%A XIMEN JI-YE
%A <br>西门纪业
%J 物理学报
%D 1984
%I 
%X Recently the sextupoles have drawn much attention in literatures, for sextupoles can be used to compensate for the third-order spherical aberration of round lenses. In the present paper, the aberration theory of a combined magnetic round lens and sextupoles system with superimposed fields has been studied. Defining an inner product in the complex number field and using the complex representation and differential operators, we have treated both the Guassian dioptrics and the electron optical aberrations up to the fourth-order in this combined system comprehensively. All aberration coefficients have been derived in explicit form.
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=6E709DC38FA1D09A4B578DD0906875B5B44D4D294832BB8E&cid=47EA7CFDDEBB28E0&jid=29DF2CB55EF687E7EFA80DFD4B978260&aid=897F826A201ED5458D543A4D90FFF0AA&yid=36250D1D6BDC99BD&vid=27746BCEEE58E9DC&iid=94C357A881DFC066&sid=E4EC39E73004B593&eid=50B6AC44200581A5&journal_id=1000-3290&journal_name=物理学报&referenced_num=0&reference_num=0