Thin Large Beryllium Window
Programme
TDE
Programme Reference
B00012163
Prime Contractor
HEIKKI SIPILA OY
Subcontractors
AALTO UNIVERSITY FOUNDATION
Finland
OXFORD INSTRUMENTS TECHNOLOGIES OY
Finland
Start Date
End Date
Status
Closed
Country
Finland
Description
Problem – Traditional X-ray windows
•Both in industrial and space applications there is need of larger area X-ray windows and filters with higher performance.
•In X-ray window thin membranes from materials containing light elements are used to avoid soft X-ray absorption. Structures should be extremely thin, radiation tolerant, tolerate over 1 atm differential pressures, hermetically tight, temperature insensitive, and withstand vibrations.
àContradictory demands sets a challenge for X-ray window foil.
•Low atomic number beryllium has good transmission.
–Downsides: Toxity, layer thicknesses, corrosion properties
•Plastic X-ray windows based on polymers are the most typical choice for applications dealing with soft X-rays .
–Downsides: Operating temperature range, inefficient diffusion barriers.
•Scaling up the area of beryllium and polymer films with decent strength requires a supporting grid structure. Such a grid reduces the transmission of the window because typically the grid material absorbs soft X-rays efficiently.
Application Domain
GEN-Generic Technologies
Technology Domain
17 - Optoelectronics
Competence Domain
1-EEE Components, Photonics, MEMS
Initial TRL
TRL N/A
Target TRL
TRL N/A
Achieved TRL
TRL N/A
Public Document
Final Presentation