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aspex:psem [2017/10/13 22:49] – [Computer: engine] mcmasteraspex:psem [2018/07/01 01:26] mcmaster
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 {{:mcmaster:aspex:psem:overview.jpg?300}} {{:mcmaster:aspex:psem:overview.jpg?300}}
 +
 +====== Operation ======
 +
 +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:
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 "Both detectors record 2,048 channels of 10eV per channel" "Both detectors record 2,048 channels of 10eV per channel"
 +
 +
 +====== 2018-06-30 ======
 +
 +Use T5 bit to remove cartridge
 +
 +Yesterday ordered spare cartridge
  
 
 
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