The Extrel RGA is available in two (2) mass ranges, 1 to 100 amu or 1 to 300 amu. The system comes standard with a Faraday detector or an optional dual Faraday/Electronic multiplier detector.
The Extrel RGA utilizes RS-232C or USB communication with Windows® XP or 7 operating systems. The software is powerful and easy to use.
Long-Life Dual Filaments and the Ion Source Kits
Dual thoria-coated filaments are used for electron emission for both the quadrupole and ion gauge operation. The filaments are protected against stress from vacuum excursions by both the ion and the Pirani functions. Our RGA will outlast filaments in conventional RGA units. When a filament eventually does burn out, the second filament will allow for normal operation until filaments are replaced.
The RGA units come standard with a Faraday cup detection system. With the Faraday cup alone, the partial pressure measurements from 10-4 and 10-11 torr may be made. With the multiplier option, this sensitivity is extended down to 5 x 10-14 torr. The novel ion current amplifier detects ion currents from 10-6 to 10-15 amps in a single scan. This huge dynamic range allows for very large and very small peaks to coexist on one scan.
Mass Filter Type: Quadrupole
Detector Type: Faraday cup
Resolution: Greater than 0.5 amu at 10% peak height. Adjustable to Constant peak width throughout the mass range.
Sensitivity (A/Torr): 5x10-4 into Faraday
cup measured with N2 at 28 amu with 1 amu full peak width, 10% height, 70 eV electron energy, 6 eV ion energy and 2 mA electron emission current. Multiplier operation adds a factor of about 1000.
Minimum Detectable Partial Pressure: 10-11 torr measured with N2 at 28 amu with 1 amu full peak width, 10% height, 70 eV electron energy, 6 eV ion energy, and 2 mA electron emission current. With multiplier this detection is to 5 x 10-14 torr.
Atmosphere to UHV (ion gauge operation below 10-1 torr and RGA operation below 10- 4 torr)
Maximum Operating Temperature: 50°C
Bakeout Temperature: 300°C (without CCU)
Total Pressure Measurement: Available in Pirani, BA, and RGA modes
Ionizer Design: Open ion source, electron impact ionization
Prove Materials: SS304, Kovar, Tungsten, Alumina, Iridium, Copper, Nickel
Filament: Dual thoria-coated iridium with firmware protection. Built-in 1 to 30 W degas ramp-up. Engineered for field replacement
Electron Energy: 40 to 150 V, programmable
Ion Energy: 3 to 10 V, programmable
Electron Emission Current: 0.2 to 5 mA, programmable Probe Dimension: 6.7 from flange face to top of ionizer
CCU Extension: 5.5 from flange face
Minimum Tube I.D.: 1.375 Probe Mounting
Flange: 2.75 CF
CCU Dimensions: 3.3 x 4.8x 7.5. Easily separated from the probe for bakeout
Warm-up Time: Mass stability ±0.1 amu after 30 minutes
Computer Interface: RS-232C, up to 115,200 Baud Software Windows® NT, 2000, XP based application. Requires Pentium or better
Power Requirement: 24 VDC @ 2.5 Amps. Standard 120/240 VAC adapter supplied
Weight: 5 lb