Initial Alignment
Condenser Double Deflector Alignment
NOTE: The specimen must be set to the correct height/objective focus before making these alignments. See Z Height Adjustment in JEOL JEM-4000FX TEM.
COND ALIGN TILT (Image Wobbler Adjustment)
1. Set the SPOT SIZE=1, MAG=~50 kX. |
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| 2. Focus beam to a spot using the BRIGHTNESS knob. | VIEW | |||||
| 3. Engage the COND ALIGN, TILT button (in right drawer). | VIEW | |||||
| 4. Toggle the DEF WOB, TILT X (in right drawer). | VIEW | |||||
| 5. Minimize motion of illumination using the DEF X and SHIFT X (in right drawer). The flickering circles should converge to a single, stationary spot. See the Interactive Alignment Demo in JEOL JEM-4000FX TEM. |
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6. Repeat steps 4 - 5 for Y. |
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| 7. Disengage the DEF WOB, TILT and the COND ALIGN, TILT. | VIEW | |||||
| 8. Center illumination with the SHIFT X, Y (on main panel). NOTE: The voltage centering adjustment will be easier if you repeat this adjustment at a higher magnification. |
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COND ALIGN SHIFT
1. Set the SPOT SIZE=1, MAG=~50 kX. |
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| 2. Turn the BRIGHTNESS knob fully clockwise. | VIEW | |||||
| 3. Engage the DIFF mode button from the FUNCTION buttons on the right control panel. | VIEW | |||||
| 4. Use the SELECTOR knob to set SADIFF = 1.0 nm. | VIEW | |||||
| 5. Use the DIFF FOCUS to obtain the caustic spot. | VIEW | |||||
| 6. Engage the COND ALIGN SHIFT. | VIEW | |||||
| 7. Toggle the DEF WOB SHIFT to X (in the right drawer). | VIEW | |||||
| 8. Use the SHIFT X and DEF X to minimize the motion. | VIEW | |||||
9. Repeat steps 7 and 8 for Y. |
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| 10. Turn the DIFF off by depressing the button again. | VIEW | |||||
| 11. Turn the BRIGHTNESS knob counterclockwise to a spot and center the beam. | VIEW | |||||
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