Cathodes
Over the last 50 years, Spectra-Mat’s technology for dispenser cathodes contributed to the latest advancements of the modern microwave, linear accelerators and x-rays tubes industry. Spectra-Mat duly controls all production processes from tungsten powder sieving till temperature test of the dispenser cathodes. Our Engineering Department supports the developments of new cathodes structures and shapes together with the possible addition to other components to dispenser cathodes inside the gun while our quality assurance procedures guarantee the full traceability of all the components.
- Sizes: diameter from 0.010″ (0.25 mm) to over 10.00″ (254 mm)
- Tungsten densities: from 50% to 84%
- Standard impregnants: 532, 411, 311, 612
- Scandate Mixes: 532X, 411X, 311X, 612X
- Coatings available: OsRu, OsW, Ir
- Machined Tolerance: +0.0002″ (+0.005 mm)
- Proven current density in CW mode: up to 20 A/cm2
- Proven current density in pulsed mode: up to 120 A/cm2
- Proven operating lifetime: over 150000 hours
- Hollow cathodes, assembled guns and UHV potted > Coatings available: OsRu, OsW, Ir heaters available
Cathodes For Ion Gas Lasers
Applications
- Despite the success of the solid state and semiconductor lasers, ion gas lasers are still widely used in a variety of industrial and scientific applications because of their superior characteristics in terms of coherence of the laser beam.
- Since the beginning of the development of ion gas lasers, Spectra-Mat contributed to the success of the technology.
- Since then Spectra-Mat has manufactured thousands of high quality and highly reliable cathodes.
- Spectra-Mat Patent N° 3514661.
Features
- Robust structure
- Spirals diameters ranging from 0.13″ up to over 1.00″.
- Excellent parallelism of spirals
- Reliable welding of Mo legs
- High purity raw materials for impregnants guaranteeing stable and high electrons emission
- Proven long life in ion gas laser operating conditions
- Cathodes are working excellently in Ar, Xe, Kr and HeCd gasses and their mixtures
- No outgassing
By leveraging the expertise in dispenser cathodes for microwave tubes
Spectra-Mat contributed to the development of high performances flash lamps, arc lamps and gas discharge devices by supplying cathodes of different shapes (circular with a tip and able to accommodate a stem) and sizes. Moreover, the material used for cathodes in high vacuum tubes guarantees an extremely low outgassing level with no carbonated gasses that might create black spots on the glass walls of the lamps.
Over the time Spectra-Mat cathodes showed a sizeable resistance to ion bombardment in different gas mixtures and pressures in lamps and gas discharge devices, enabling a longer lifetime of the devices. The large variety of different impregnants together with their high purity enables the optimization of the cathode performances.
- Long lifetime
- Resistance to ion bombardment
- Different shapes and sizes
- Different impregnants available
- Low outgassing
- High open porosity surface
Dispenser Cathodes For X-Ray Tubes
is enabling not destructive, faster and more accurate real time quality controls and inspection in the production lines of many electronic devices such as batteries and printed circuits boards as well as in the food and drug industries, The spot size diameter of the x-ray beam for the micro focus systems is below 10 microns: small diameter, tip shaped dispenser cathodes are enabling this micrometric diameter of the x-ray beam. that might find also important applications in the medical science. The dispenser cathodes for x-rays tubes can have different shapes and sizes down to 0.01″ (0.25 mm) as shown below.
- Proven long life.
- Standard and scandate mixes available.
- Tip size down to 0.01" (0.25 mm).
- OsRu coating.
- Dispenser cathodes with bases available.
- Engineering support to design the suitable cathode geometry.
| Tip Diameter |
Unpotted X-ray Cathodes (1126X Series) |
Potted X-ray Cathodes (1126HX Series) |
Potted With Sleeves X-ray Cathodes (1126HS Series) | Potted With Sleeves and Base X-ray Cathodes (1126HB Series) |
|---|---|---|---|---|
| 0.096 (2.5 mm) | 112-600 | 112-610 | 112-620 | 112-630 |
| 0.020 (0.5mm) | 112-602 | 112-612 | 112-622 | 112-632 |
| 0.039 (1 mm) | 112 604 | 112-614 | 112-624 | 112-634 |
| 0.059 [1.5 mm] | 112-606 | 112-616 | 112-626 | 112-636 |
| HT.:3 Series – Emitter | Bcdv / Heater / Sleeve / | ||||
Dispenser Cathodesss
Over the last 50 years, Spectra-Mat’s technology for dispenser cathodes contributed to the latest advancements of the modern microwave, linear accelerators and x-rays tubes industry. Spectra-Mat duly controls all production processes from tungsten powder sieving till temperature test of the dispenser cathodes. Our Engineering Department supports the developments of new cathodes structures and shapes together with the possible addition to other components to dispenser cathodes inside the gun while our quality assurance procedures guarantee the full traceability of all the components.
- Sizes: diameter from 0.010" (0.25 mm) to over 10.00" (254 mm)
- Tungsten densities: from 50% to 84%
- Standard impregnants: 532, 411, 311, 612
- Scandate Mixes: 532X, 411X, 311X, 612X
- Coatings available: OsRu, OsW, Ir
- Machined Tolerance: +0.0002" (+0.005 mm)
- Proven current density in CW mode: up to 20 A/cm2
- Proven current density in pulsed mode: up to 120 A/cm2
- Proven operating lifetime: over 150000 hours
- Hollow cathodes, assembled guns and UHV potted > Coatings available: OsRu, OsW, Ir heaters available
cathods for twts:
small diameter, high performance dispenser cathodes are produced in relatively large volume.
Cathodes for Klystrons and Gyrotron:
Spectra-Mat has been the leading manufacturer for large diameter and high performance dispenser cathodes.
Cathodes for magnetron:
long hollow dispenser cathods are available for magnetron use.
Cathodes for Ion Thrusters and TeraHz sources:
Cathodes for Ion Thrusters and TeraHz sources: dispenser cathodes are enabling new applications such as electric propulsion and of THz sources for telecom, scientific and industrial applications.
Cathodes for x-rays:
small diameter dispenser cathods with tips of different geometries are enabling new x-rays application.
Cathodes for neutron generators:
Dispenser cathodes with particular shapes are available.
Cathodes for industrial application:
Dispenser cathodes are enabling new applications such as ebeam polymerization and sterillization.
Cathodes for linear accelerators:
Spectra-Mat supplied the largest diameter dispenser cathodes for linear accelerators for scientific and medical use.