Real time FPGA-based seam finder for EBW facility
We present an approach to build of real time continuous seam finder module with waveform generator (arbitrary signal can be generated), which allows automatic coordinate correction within 2ms on the go. Module is made for electron beam welding facility developed at Institute of nuclear physics SB RAS.
Hard real time subsystem is implemented on hybrid CPU+FPGA architecture. ADC data from secondary emission electrode processed with program written on domain specific language Caph (program calculates seam position within 20us).