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Galaxy technology provides a new approach to stable pumping
of air and argon, with reasonable cost for new pumps and
rebuilding/retrofitting of existing pumps.
The new ion pump technology has:
1 The air, hydrogen and water-vapor pumping speed and capacity of a standard diode.
2 The air/argon stability of triode, Starcelltm and differential/noble ion elements.
3 Lower price than the differential ion/noble diode which contain expensive tantalum.
4 Longer life and better low pressure operation than the triode.
Examples of good applications:
1 Purchase new ion pumps for stable pumping of air, especially at low pressures. (High
Energy Physics, Electron Microscopes)
2. Rebuild/retrofit triode pumps to get better physical ruggedness, lifetime and low
pressure operation.
3. Rebuild differential ion and noble ion pumps at reduced cost.
Summary of Galaxytm Specifications
The new Galaxy ion pump technology uses two titanium cathodes penetrated with spiral
patterns which are axially co-located beneath the anode cells. Noble gas ions, such as argon,
strike the spiral elements at grazing incidence, resulting in sputtering and neutralization. The
neutralized atoms are permanently buried in inactive areas of the pump.

An image of a Galaxy cathode is shown below.
1. Pumping speed for active gases: The Galaxy pumping speed and capacity for air,
hydrogen and water is the same as for the standard diode (two flat titanium cathodes).
2. Stability for air pumping: The Galaxy pumping speed for air is stable for all pressures
and extended times measured.
3. Pumping speed for argon: The Galaxy pumping speed for argon is ~ 10% of its pumping
speed for air. This represents ~ 65-70% of the pumping speed for argon of the same geometry
DI (Differential Ion), Noble Diode, Starcell or Triode ion pumps. Galaxy operation for argon
is stable for all pressures and times measured, except at argon operating pressures above about
2 X 10-5 Torr.
4. Lifetime: Accelerated and extrapolated lifetime tests with air and argon indicate that the
lifetime of the Galaxy elements is in the same range quoted for other ion pump element
technologies, i.e. 40,000 to 50,000 hours at an operating pressure of 1 X 10-6 torr.
Galaxy elements plus new and rebuilt ion pumps are available from Duniway
Stockroom Corp. for:
Varian-style pumps (Part Number: EL-LG-GX)
PE-style pumps (Part Number: NEW-GXY-2000)
Starcell pumps (Part Number: EL-ST-GX)
Please inquire for other configurations and special applications.
Galaxy cathodes, elements and pumps are covered by US Patent #6004104
Galaxy is a trademark of Duniway Stockroom Corp.
Starcell is a trademark of Varian, Inc.

Condition

Brand new.

Includes

• DUNIWAY NEW-GXY-2000 New ION Pump Element PE-style pump

LRGS

Warranty

30 Day warranty. We pledge to offer the best service and warranty to all of our customers! We are extending a 30 Day warranty on this item. This is our way of saying thank you for allowing us to serve you.

Certification

This is a genuine product from this manufacturer.

Disclaimer

Regardless of the origin of the equipment, documentation provided or identification appearing upon the equipment, the equipment described and offered here is in no way certified for, recommended for, or offered for any specific use. The purchaser agrees that the seller shall not be held responsible or liable for any injuries or damages, whether incidental or consequential, associated in any way with the equipment. The purchaser, by bidding on this equipment, indicates their acknowledgment of, and agreement to the terms of this disclaimer. it is the purchaser's responsibility to have the item inspected and certified by a qualified professional before use!