SCRIT electrodes
Product information
Metal Technology Company designed and manufactured the latest version of the SCRIT electrodes, which form the core part of the “study of the internal structure of short-lived unstable (radioactive) nuclei” conducted by RIKEN. SCRIT is an abbreviation of self-confining radioactive isotope ion target.
Using ultra-thin metal wires, we created a double-cylindrical structure consisting of the inner cylinder that looks like a complicated bird-cage and the outer cylinder that is made up of metal wires aligned parallel to the electron beam. Both cylinders get electrically insulated and thus it is possible to apply different electrical potentials.
Product technology
This product has been built by using thin metal wires (stainless steel with φ0.2) with a total length of 830 mm that have been assembled utilizing resistance welding and other methods.
In order to determine the final structure, we utilized FEM analysis to check
natural vibration frequency and deformations caused by the weight when it has
reached its’ final dimensions.
We also used partial models to simulate
buildability. To reduce deformation caused by its’ own weight to a minimum, we
had to take into account severe dimensional constraints. Under these severe
conditions we attached a mechanism on both sides that pulls the metal wires of
the outer cylinder one by one using springs. The design, construction and heat
treatment of these springs was also conducted by Metal Technology
Company.
As this product will be installed in an electron accelerator we
paid careful attention to manufacturing it under ultraclean conditions to
prevent any disturbance to the vacuum.
