{"id":5413,"date":"2026-08-07T06:55:32","date_gmt":"2026-08-06T21:55:32","guid":{"rendered":"https:\/\/www.aem.imr.tohoku.ac.jp\/?p=5413"},"modified":"2026-08-07T06:55:32","modified_gmt":"2026-08-06T21:55:32","slug":"jem-2100plus%ef%bc%9a%e6%a5%b5%e5%be%ae%e9%9b%bb%e5%ad%90%e5%9b%9e%e6%8a%98","status":"publish","type":"post","link":"https:\/\/www.aem.imr.tohoku.ac.jp\/en\/jem-2100plus%ef%bc%9a%e6%a5%b5%e5%be%ae%e9%9b%bb%e5%ad%90%e5%9b%9e%e6%8a%98\/","title":{"rendered":"JEM-2100plus: Micro-Area Electron Diffraction"},"content":{"rendered":"\n

Note: This page was translated by AI from the Japanese original. In case of any discrepancy, the Japanese version shall prevail.<\/em><\/p>\n\n\n

Original post date (Japanese version): June 22, 2024<\/em><\/p>\n\n\n

💡 Converge the electron beam on the specimen and acquire a diffraction pattern from a region narrower than the selected area aperture.<\/p>\n\n\n

NBD\/CBD<\/h3>\n\n\n
    \n
  1. Display the image using the normal method.<\/strong><\/span><\/li>\n\n\n
  2. Change irradiation mode<\/strong><\/span>\n
      \n
    1. [PANEL-L:PROBE CONTROL:NBD\/CBD] Change to probe irradiation mode<\/li>\n<\/ol>\n<\/li>\n\n\n
    2. Converge and center the beam<\/strong><\/span>\n
        \n
      1. [PANEL-L : BRIGHTNESS] Converge the beam on the fluorescent screen.<\/li>\n\n\n
      2. [PANEL-L : DEF\/STIG : BRIGHT TILT] Select Bright Field irradiation mode<\/li>\n\n\n
      3. [PANEL-L\/R: SHIFT-X\/Y] Move the beam to the center of the fluorescent screen using Beam Shift<\/li>\n<\/ol>\n<\/li>\n\n\n
      4. Centering the condenser lens aperture<\/strong><\/span>\n
          \n
        1. [PANEL-L : BRIGHTNESS] Spread the beam to about the same size as the screen<\/li>\n\n\n
        2. [CLA: Aperture selection knob] Select the diameter of the condenser aperture.<\/li>\n\n\n
        3. [CLA: Aperture position adjustment knob: Front-back\/Left-right] Move the aperture to the center of the screen.<\/li>\n<\/ol>\n<\/li>\n\n\n
        4. Irradiation system adjustment 1<\/strong><\/span>\n
            \n
          1. HT Wobbler On<\/strong><\/span>\n
              \n
            1. [TC : Wobbler Controller : HT] or [PANEL-R: HT WOBB] On<\/li>\n\n\n
            2. Acceleration voltage fluctuates and the image expands\/contracts<\/li>\n<\/ol>\n<\/li>\n\n\n
            3. Irradiation system adjustment (Condenser mini lens)<\/strong><\/span>\n
                \n
              1. [PANEL-L : DEF\/STIG : BRIGHT TILT] or [TC : Alignment Panel : Deflector : Bright Tilt] Select Bright Field irradiation mode<\/li>\n\n\n
              2. [PANEL-L\/R: DEF\/STIG-X\/Y] Adjust Beam-Tilt + [PANEL-L\/R: Shift-X\/Y] Beam-Shift so that the convergence of the electron beam becomes isotropic at the center of the fluorescent screen.<\/li>\n<\/ol>\n<\/li>\n\n\n
              3. HT Wobbler Off<\/strong><\/span>\n
                  \n
                1. [TC : Wobbler Controller : HT] or [PANEL-R: HT WOBB] Off<\/li>\n<\/ol>\n<\/li>\n<\/ol>\n<\/li>\n\n\n
                2. Irradiation system adjustment 2<\/strong><\/span>\n
                    \n
                  1. [PANEL-L:PROBE CONTROL:TEM] Change to TEM irradiation mode<\/li>\n\n\n
                  2. [PANEL-L\/R: SHIFT-X\/Y] Move the beam to the center of the fluorescent screen using Beam Shift<\/li>\n\n\n
                  3. [PANEL-L:PROBE CONTROL:NBD\/CBD] Change to probe irradiation mode<\/li>\n\n\n
                  4. Repeat the above to minimize the deviation of the electron beam<\/li>\n\n\n
                  5. [PANEL-L:PROBE CONTROL:TEM] Change to TEM irradiation mode<\/li>\n<\/ol>\n<\/li>\n\n\n
                  6. Insert and center the condenser lens aperture<\/strong><\/span><\/li>\n\n\n
                  7. Specify measurement location<\/strong><\/span>\n
                      \n
                    1. [PANEL-L : BRIGHTNESS] Converge the beam on the fluorescent screen.<\/li>\n\n\n
                    2. [PANEL-L\/R: SHIFT-X\/Y] Move the beam to the measurement location using Beam Shift.<\/li>\n<\/ol>\n<\/li>\n\n\n
                    3. Display electron diffraction<\/strong><\/span>\n
                        \n
                      1. [PANEL-R : Function : SA DIFF] Change to diffraction mode<\/strong><\/span><\/li>\n\n\n
                      2. [PANEL-R : MAG\/CAM L] Set camera length<\/strong><\/span><\/li>\n\n\n
                      3. Spot centering\n
                          \n
                        1. [PANEL-L : DEF\/STIG : PLA] Select Projector Lens Alignment mode<\/li>\n\n\n
                        2. [PANEL-L\/R: DEF\/STIG-X\/Y] Center the transmitted wave to the center of the fluorescent screen<\/li>\n<\/ol>\n<\/li>\n<\/ol>\n<\/li>\n<\/ol>\n\n\n

                          Simplified Method<\/h3>\n\n\n
                            \n
                          1. Display DIFF using the normal method<\/strong><\/span>\n
                              \n
                            1. Adjust diff focus in advance<\/li>\n<\/ol>\n<\/li>\n\n\n
                            2. Display the image using the normal method.<\/strong><\/span><\/li>\n\n\n
                            3. Irradiate the measurement location with beam<\/strong><\/span>\n
                                \n
                              1. [CLA#4(\u03a610um)] Insert and center a small CL aperture<\/li>\n\n\n
                              2. [PANEL-L : PROBE CONTROL : SPOT SIZE] 5: Decrease SPOT size<\/li>\n\n\n
                              3. [PANEL-L : BRIGHTNESS] Converge the beam on the fluorescent screen.<\/li>\n\n\n
                              4. Adjust CL-STIG\n
                                  \n
                                1. [PANEL-L : DEF\/STIG : COND STIG] Select Condenser Lens Astigmatism adjustment mode<\/li>\n\n\n
                                2. [PANEL-L\/R: DEF\/STIG-X\/Y] (Cond STIG) Adjust so that the beam is maximally converged<\/li>\n<\/ol>\n<\/li>\n\n\n
                                3. [PANEL-L\/R: SHIFT-X\/Y] Move the beam to the measurement location using Beam Shift.\n