Assertion: ion | /r/HasProperty | accelerated through second tube
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Source sentences:
text: Negative ion beams are injected into the accelerator low energy tube; once inside the terminal (the portion between the low energy and high energy tubes), the negative ions enter an area rich in nitrogen where the extra electron plus one or more electrons are stripped off generating positive ions; these ions are accelerated through the second tube to be delivered at the exit of the accelerator.