Extraction vacuum at the accelerating tube and gun section

Connect all ion cables to the ion pump and leak detection, and before disconnecting, note the connection position gauge, and the nitrogen and T-type hose inflation lines. We reversed and recorded each reading with a multimeter. Write down all the parts that are close to the deflecting magnets. After working for a few days, the vacuum level can reach the precise position inside the machine. Make a mark. When the new one does not have the value of the vacuum pump, we start the vacuum pump and run a slight deviation.

The force used by the torque wrench, when replaced with new ones, was not severely leaked with this discovery, resulting in leakage and vacuum pump-like forces. Extraction achieves a relative dynamic balance. Can remove the leak with small deflection will bring greater difficulty to the leak detection work. My magnets are hoisted vertically with a gantry crane and gently lowered, so we have to replace the deflection magnet by paragraph-by-segment elimination.

We first hit the machine in position and used a magnetic suspension micrometer with a pressure gauge to look for 90 degrees. After the sleeper pad was stable, some lead was removed to reveal the best position drift tube and the connection to the accelerating tube and the deflection magnet. The connection between the deflection yoke and the outside world is to find the drift tube through the acetone leak detection, and it is found that there is no leakage, eliminate the connection joint, and measure the reading after the power is turned on, connect the water line, pass the water pump, be careful of the water to accelerate the tube and the part of the gun Take a vacuum. The ion pump was started, repeatedly extracted, and with constant values, indicating that there was no leakage of these parts. Now only the nitrogen is cleaned, because it is a new deflection magnet, this part of the remaining target and deflection magnet, with the drift tube and seal off the process will continue for more than a day, the vacuum will be close to a stable value.

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