EMS 操作.pptVIP

－EMS软件应用 Electron Microscope Image Simulation EMS介绍 EMS EMS is a software package for electron diffraction analysis and HREM image simulation in material science. It is developed by Pierre Stadelmann at the Centre Interd artemental de Microscopie Electronique of the Ecole Polytechnique Fédérale de Lausanne. EMS功能（1-11） ac : calculates integral of wavefunction intensity (ALCHEMI). ad : adds (C), (F) or (R) images. aj : adjusts lattice parameters on two experimental diffraction patterns. an : computes the angle and length ratio of [u,v,w] and (h,k,l) vectors. ap : draws the beam amplitude and phase in the complex plane (Argand Plot).  bd : draws the difference of amplitude and phase of two beams. bi : forms images with intensity profiles stored in .bea files. bp : draws the beam amplitude and phase as a function of specimen thickness bs : computes Bloch waves for a systematic row of beams. bu : builds the crystal file. bz : computes Bloch waves for a zone axis.  EMS功能（12-22） cb : calculates CBED and LACBED patterns with uncoherent illumination. cc : calculates CBED and LACBED patterns with coherent illumination. co : prints (I) images of super-cells and overprints the atom positions. cr : transforms (C) images into their real and imaginary parts. cs : calculates the defocus and spherical aberration from diffractograms. cu : cuts very large (I) images into smaller (I) images. di : draws spot patterns for ZOLZ and HOLZ. ds : displays the crystal structures in perspective view or in projection. fc : does fast CBED and LACBED pattern calculation coherent or uncoherent ill. fi : prints content of crystal files. ft : does a FFT on an (C) or (F) images.  EMS功能（23-36） hl : draws HOLZ lines patterns. hr : does a complete HREM calculation given a crystal