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X-Ray Generator
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The x-ray generator on R-AXIS IIC is composed
of two major parts, the rotating anode (target) and the cathode/filament.
Both components are housed in an x-ray tube (chamber) under very high
vacuum. The target rotates at 6000 rpm, driven by a motor, and cooled
by chilled water from a water chiller. The tube is powered up to 50kV
and 100mA for data collection. Below is a list of some common procedures
and possible problems in the operation/service of the x-ray generator.
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To service the anode, it's necessary to
1. Undo the belt (see change belt).
2. Release vacuum (see pump/release vacuum).
3. Disconnect water hoses (four of them).
4. Dismount the rotation sensor (see the drawing to the left).
5. Remove side cover [need to undo four (green in the figure) screws],
which also removes the whole anode assembly, and cover the side with
a replacement plate (which is in one of the tool/accessory drawers
in the lab).
6. After service, re-install the assembly in reversed order.
To service the cathode/filament, it's necessary to
1. Release vacuum.
2. Remove front cover [also need to undo four (green in the figure)
screws].
3. After service, re-install cathode/filament in reversed order. |
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