Stand 4 Rotating Coil System Review DSAbased Integrator

Stand 4 Rotating Coil System Review DSA-based Integrator Jerzy Nogiec June 8, 2018

Inception • NI Dynamic Signal Acquisition (DSA) cards have been successfully used for magnetic measurements at LBNL and ANL. • DSA devices are designed to accurately measure the frequency content of signals with a very high dynamic range. • Software and Computing Systems Group has been asked to develop a digital integrator based on PXI DSA cards. • X. Wang et al. , A hybrid data acquisition system for magnetic measurement of accelerator magnets, Superconducting Magnet Program report #: SMP 201105 -1 A. • Dynamic Signal Acquisition Fundamentals, http: //www. ni. com/whitepaper/12349/en/ 2 J. Nogiec | DSA-based Integrator 2/14/2022

Instrumentation: NI 4462 • • • PXI DSA device 4 input channels ADC type: Delta-sigma Max rate: 204. 8 k. S/s ADC resolution: 24 bits Input coupling: AC or DC Data transfer: DMA Gains (d. B): 30, 20, 10, 0, -10, -20 Self-calibration NI 446 x Specifications, http: //www. ni. com/pdf/manuals/373770 j. pdf 3 J. Nogiec | DSA-based Integrator 2/14/2022

Instrumentation: NI 7854 R • Multifunction Reconfigurable I/O (RIO) • I/O channels: 8 AI, 8 AO, 96 DIO • User reconfigurable FPGA • Digital I/O compatibility: TTL • FPGA: Virtex-5 LX 110 • DMA channels: 3 NI 7854 R Specifications, http: //www. ni. com/pdf/manuals/372492 c. pdf 4 J. Nogiec | DSA-based Integrator 2/14/2022

Instrument Block Diagram: Prototype DSA DAQmx DMA RIO trigger timing integration TDMS archiver RTOS DMA FPGA The prototype solution has been successfully tested at VMTF with 8 channels, 204. 8 k. S/s, 1024 triggers/revolution and continuous operation. 5 J. Nogiec | DSA-based Integrator 2/14/2022

Instrument Block Diagram: Ethernet Standalone Device DSA controller receiver DAQmx sender DMA RIO trigger timing integration Commands from HOST Data to HOST RTOS DMA FPGA A PXI-based digital integrator will operate as a standalone Ethernet device capable of providing multiple channels of integrated data with external triggering by angular encoder. 6 J. Nogiec | DSA-based Integrator 2/14/2022

Integration ADC samples 7 J. Nogiec | DSA-based Integrator Interval between a/e triggers 2/14/2022

Prototype Integration Method § Equally spaced samples (Fs = 204. 8 k. S/s, 24 -bit) § Trigger signal sampled with a time resolution of 25 ns § Surface is calculated using the amplitude value and time between triggers ( Rectangular Integration) 8 J. Nogiec | DSA-based Integrator 2/14/2022

Summary • NI DSA cards have been successfully applied to magnetic measurements at LBNL and ANL. • A prototype develop by S&CG shows capability for multirotation measurements with the rotating coil system. • Building a multi-channel PXI-based integrator is a feasible solution, which is less costly than Metrolab’s FDI. 9 J. Nogiec | DSA-based Integrator 2/14/2022