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'''Note: Watch the effusion cell voltage supply during the growth. If the "overvoltage" light turns on, turn the respective voltage supply off, then back on. Otherwise, the temperature will plummet, to the possible damage of the crucible in the given effusion cell.''' | '''Note: Watch the effusion cell voltage supply during the growth. If the "overvoltage" light turns on, turn the respective voltage supply off, then back on. Otherwise, the temperature will plummet, to the possible damage of the crucible in the given effusion cell.''' | ||
# Heat the Al source to | # Heat the Al source to 1200<sup>o</sup>C in steps of 50<sup>o</sup>C, Al is kept at 850<sup>o</sup>C | ||
# Leave the Al at | # Leave the Al at 1200<sup>o</sup>C for half an hour to outgas the source | ||
# Raise the window shield | # Raise the window shield | ||
# Make certain the QCM water is on | # Make certain the QCM water is on |