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Filament Design

Filament Design

The knowledge and experience gained from producing thousands of filaments for a wide variety of manufacturers and models of instruments gives SS Scientific the technical edge. We learned from the various types of filaments we’ve manufactured and repaired, which designs worked best and what could be done to increase filament life and performance. Our goal in producing new filaments is to improve the design, increase filament life, reduce the cost and improve the filament and mass spectrometer performance.


Filament Type:

  • Straight
  • Coiled
  • Custom Design


Choice of Material:

  • Tungsten
  • Thoria
  • Yttria


Special Services:

  • Prototypes
  • Production quantities
  • Project Management


Filament Cleaning

Facilities and techniques used to clean filaments during manufacture include:

  • Sandblasting
  • Buffing wheels and Micromesh abrasives
  • Electropolish
  • UHV cleaning procedures#


Filament Alignment

We operate a quality control procedure to ensure the accurate alignment of the filament carrier and wire. Using a video microscope enables us to accurately align the filament wire over the mass spec source ion entrance hole as well as perform quality control inspections of the filament and the welding process.

Precision Spot Welding

Different sized spot welder systems are used for manufacturing mass spec filaments. Depending on the filament, unique jigs have been custom designed and manufactured for the accurate alignment and tensioning of the filament wire on the filament support body during the spot welding process.

Filament Coating

We offer Thoria or Yttria filament coating, either as part of the filament manufacturing process, or as a service for coating filaments that you supply to us. The coating service has a no-quibble guarantee on performance.

Filament Conditioning

All filaments outgas when initially powered, but new filaments require a careful power ramp-up to avoid debris contaminating a UHV system. After coating, our filaments can be fully conditioned on a degassing rig to ensure that they arrive with you ready for immediate use.