| Popis: |
The pumping action of titanium is considerably enhanced if the active layer is made on a cold surface. High pumping speed of 10 liters/sec⋅cm2 for usual gases, capacity at saturation of about 1016 molecules/cm2, limit pressure down to 10−10 Torr, and good cleanliness make it very attractive for a number of applications. Titanium monoxide TiO has very similar properties at low temperature and, in addition, can pump argon. Titanium pumping is particularly suited to big-size installations with very specific problems like the nuclear fusion research apparatus and the space simulation chambers. Examples of these two cases are described. |
