Diagnostics Experts of European Light Sources [DEELS]

Discussion Trigger: Pinholes technologies

13 May 2025, 15:30

30m

Elettra-Sincrotrone Trieste

Discussion trigger Session 7

Speaker

Marco Veronese (Elettra Sincrotrone Trieste S.C.p.A.)

Description

For the Elettra 2.0 X-ray pinhole camera (XPC) on beamline XDBL1, we are aiming for pinholes as small as 10 microns. In literature, the technological details of pinhole design are not discussed in great detail. The aim of this discussion is to gather and share experience on the optimal choice of pinhole technology. Starting from the main design concept of a stack of tungsten plates with spacers, questions immediately arise:
What are the minimum requirements for the X-ray absorption of the pinholes? How does the scattering of X-rays in the pinholes affect the final measurement?
There are also a number of technological questions: is it necessary to use pure tungsten or would it be possible to use tungsten alloys or tungsten carbide? What is the experience with other materials such as molybdenum? What is the smarter and more reproducible technology for the spacers? Diamond Light Source colleagues have introduced gold lithographic pinholes. How do they compare with the main design concept?

Presentation materials

DEELS2025_pinholes_technology.pdf