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| aspex:psem [2017/10/13 22:49] – [Computer: engine] mcmaster | aspex:psem [2018/04/25 18:46] – mcmaster | ||
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| + | ====== Operation ====== | ||
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| + | 2018-04-24 notes | ||
| + | * Summary: generally seems to work, reliability issues possibly software related | ||
| + | * Booting | ||
| + | * Embedded controller ethernet must have system (ie my laptop) at other end at boot | ||
| + | * Embedded controller stage connection must be attached at boot | ||
| + | * Cannot be activated without restarting system | ||
| + | * GUI will complain and then segfault, but otherwise seems operational | ||
| + | * GUI | ||
| + | * Sometimes signal disappears and can be made to come back by switching signal views around (ie left pane vs right pane) | ||
| + | * Sometimes GUI becomes completely unresponsive and has to be rebooted. But seems to only happen when changing settings, ie not during imaging cycles | ||
| + | * Pressure | ||
| + | * Around 2E-5 typical pressure after pumping down | ||
| + | * BSE not working | ||
| + | * Wiggling power cable RJ-11 causes noise on screen | ||
| + | * Removing signal BNC results in blank screen | ||
| + | * Next | ||
| + | * Check power supply | ||
| + | * Scope on BNC | ||
| + | * EDS still not tested | ||
| + | * Adjusting XY centering helped bring up beam energy | ||
| + | * Current was something like 25 uA...think target is 75 uA => probably need to adjust something | ||
| + | * Was able to select different acceleration voltages | ||
| + | * Focusing | ||
| + | * Set image to 256x256 | ||
| + | * Set scan speed relatively high | ||
| + | * Adjust slider until in focus | ||
| + | * Increase resolution if need to get finer focus | ||
| + | * Didn't try using auto-focus this time | ||
| + | * Degaussing may bring out of focus | ||
| + | * Changing accelerating voltage brought out of focus slightly maybe | ||
| + | * Higher acceleration voltages are fuzzier (makes sense => deeper penetration => more scattering) | ||
| Open questions / TODO: | Open questions / TODO: | ||