INFRARED ENDOSCOPE
Infrared endoscope dedicated to observing rapid transient phenomena (from 0.1 to around ten milliseconds) and measuring the surface temperature of the lower Divertor in the WEST Tokamak.
The mission's challenge
The development and manufacture of these endoscopes required a combination of specialized expertise within Spirit Technologies, with support from the Spirit Industries group for the manufacture of components:
- Copper-stainless steel bi-material assembly requires the use of electron beam welding.
- Ultra-high vacuum and pressurized components
- Manufacture and integration of optical components
- Very high precision machining
Specificity
Integration of optical systems (portholes, lenses) and manufacture of specific aluminum mirrors.Technical characteristics
| Entry temperature | 70°C |
| Max. exit temperature | 200°C |
| Min. pressure | ultra-high vacuum |
| Max . pressure | 30 bar |
Operational characteristics
The endoscope collects infrared (IR) radiation at a distance of approximately 1.8 m from the observation area and transmits the image of the observed field over a distance of approximately 1.7 m, from inside the vacuum chamber to the outside of the torus through a vacuum-sealed window to a 320x256 pixel focal plane IR detector operating in the 1.5-5μm band. (The pressure is around 10-5 Pa.)
Delivery times
The project was carried out over a period of 12 months:
- Technical management
- Production and supply of manufacturing plans
- Definition of manufacturing procedures
- Supply and reception of the raw materials required for the production of the assembly
- Manufacture of all the tools required for the manufacture and inspection of the components
- Packaging and delivery of the components
- All associated documentation.
Certifications
- Welding: NF EN 287-1 and NF EN 9606 standards
- DMOS (Welding plan): NF EN ISO 15609-1
- QMOS (Qualification assembly): NF ISO 15614-1
- Helium leak test
- Fluorescent penetrant testing: NF ISO 3452-1 and NF ISO 23277 standards
