Yes, the temperature of the diffusion pump rises, the internal diffusion oil evaporates faster, and the cooling water of the outer wall forms a reverse suction, which can remove the air in the furnace faster, but it can not be opened too high, too high will cause the diffusion pump to spray oil, resulting in the product having oil points, the general temperature is set at about 130-160, I hope it will be useful to you.
Of course it does. Pump oil at a certain temperature in order to achieve the best effect of the diffusion pump you are plated low-end film, with the diffusion pump is relatively cost-effective, gradually replaced by molecular pump!