Development of A BPM data readout system using MADOCA II-LabVIEW interface

We have developed new control framework called 'MADOCA II' as reported on this PASJ10 meeting. Main features of the MADOCA II are; 1) It can treat variable length data like a waveform or an image. 2) It can be running on a Windows^TM operating system. Using these features, we have developed a MADOCA II-LabVIEW interface program and applied it on a readout system for beam position monitors (BPM). The system consists of two NI's PXI 5922 digitizers (4 channels in total), a CPU and a PXI crate and the readout program was written using the LabVIEW on a 32 bit version of Windows 7. BPM data is digitized on the PXI 5922 with 50k samples/s and the data is decimated to several sampling rates (50∼5k samples/s) by the LabVIEW based software and these decimated data are transferred to remote client software via the MADOCA II middleware. Monitoring of the beam orbit is performed on the client with graphs for time-domain and frequency domain by FFT on the client software. It was confirmed that all decimated data were transferred to the client with sufficient speed without any lack. (author)