Ways to Judge the Polluted IG Tungsten Filament

The IG tungsten filament is known as the ion source which is a discipline with a wide range of applications. The IG tungsten filament is indispensable equipment in many basic research areas, such as atomic physics, plasma chemistry, and nuclear physics research. However, to a certain degree, the IG tungsten filament will be polluted because of the prolonged using of the IG tungsten filament. It requires the users have knowledge about the ways to judge whether the IG tungsten filament is polluted or not. Here are several ways can help people make a judgment.

The first method is to make a preliminary judgment of the Repeller.

Minor pollution:

1. Install the number of Repeller into 0.1, the IG tungsten filament cannot achieve the desired sensitivity.2. Auto-tuning would increase voltage of Repeller, or increases voltage of PMT.3. People can notice the obvious change of the reaction of the peak value of voltage if increase the Repeller. The above three conditions are minor pollution

Serious pollution:

1. IG tungsten filament still cannot get the expected sensitivity under a very high value PMT condition.2. The voltage of Repeller must be increased to a very high value so that the IG tungsten filament can achieve the expected sensitivity.

Another way is to make a judgment of the IG tungsten filament. The main way is to look at the filament current, the most obvious signs of the polluted IG tungsten filament is the filament current becomes large, the greater the current, the more serious pollution it exists. Therefore, when using the IG tungsten filament, users should ensure the safety of the vacuum system, the filament must not be opened in a case of leakage, or it would burn out the filament quickly.

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