Ion pumps have difficulty maintaining operation above 250 [degrees] C because of magnetic field loss and the increased gas load as gases desorb from internal surfaces.
Conventional ion pumps provide the highest pumping speeds for air and active gases.
The feedthrough is custom-designed to work with ion pumps and surface analysis equipment.
He also required bakeability because ion pumps are frequently baked out.
Blostein, "Ion pumps," Current Opinion in Cell Biology, vol.
Gadsby, "Ion channels versus ion pumps: the principal difference, in principle," Nature Reviews Molecular Cell Biology, vol.
Catalog 2001 describes vacuum components and systems, including: e-Gun[TM] evaporation sources, ion pumps
; XYZ manipulators, RNN[TM] Differentially Pumped Rotary Seals, sample handling and transfer devices, DRS-1000[TM] temperature measurement, ClearView[TM] heated viewports; gate, angle and all metal valves.
Gettering in its wider meaning was already a concept used in all capture pumps, including cryogenic and sputter ion pumps
. However, in its stricter meaning, which is more widely used in the vacuum community, gettering refers mainly to the pure chemical pumping by a specific material, without the help of any other mechanism, such as sputtering in sputter ion pumps
. The Diode VacIon Plus pump from Varian Vacuum Products (800-882-7426) is said to have the highest pumping speed among all ion pumps
for oxygen, carbon dioxide, carbon monoxide, and other getterable gases, and the highest pumping speed and capacity for hydrogen as well.
NEGs are being used increasingly in combination with ion pumps
, especially in very large conductance-limited vacuum systems such as colliders and particle accelerators where both the ion pumps
and the NEG pumps are usually built-in and provide a so-called distributed pumping action.
They are designed for applications that now are served by turbo, cryo, diffusion, and ion pumps
. Although the main thrust of the design is to provide pumping of large gas loads in the high-vacuum region, they still can pump into UHV.