1. Proposal of an ATCA based system for update of RFX feedback control Bernardo Carvalho On behalf of the Control and Data Acquisition Group

2. Aim of the proposal • Equip RFX with an ITER relevant solution with state-of-art instrumentation based on ATCA • Establish collaboration with RFX on control and data acquisition • Initiate joint activities between IPFN and RFX aiming at future joint work for ITER

3. Going for ATCA ATCAplatform is gaining traction in the physics communitybecause of • Advanced communication architecture supporting Ethernet, InfiniBand, StarFabric, PCI Express, Serial RapidIO … • Scalable aggregated shelf capacity to 2.5Tb/s • Scalable system availability to 99.999% • Robust power infrastructure (distributed 48V power system) and large cooling capacity (200W per board)‏ • Reliable mechanics (serviceability, shock and vibration) • Full redundancy support with hardware management interface First commercial open standard designed for • high throughput • High availability High interest to data acquisition for physics and attractive for experiments requiring a very high up-time

4. ATCA in Fusion JET ITER Other fusion devices • ISTTOK • W7-X • COMPASS • ISTTOK • RFX? Vertical Stabilization System g-ray spectroscopy Fast Plant System Controller

5. IPFN solutions ATCA-CONTROLLER-PCIe ATCA- MIMO-ISOL ATCA-SR-TR • Data transfer rate of up to 800 Mbyte/s over x4 PCIe to the host processor. • Choice of resolution • 250 MSPS @ 13-bit, • 400 MSPS @ 14-bit, • 500 MSPS @ 12-bit • Maximum pulse rate of 5 Mpulse/s; • Thomson Scattering, PHA,etc. • 32 analog input channels (digitizer/transient recorder) • 8 analog output channels (waveform generator). • 8 digital input/output channels • Customizable carrier boards and rear transition modules • Both types of analog I/O can be present on the carrier board and on the RTM. • twelve ATCA fabric channels (x1/x4 full-duplex PCIe) • multicore processor RTOS (RTAI for linux)    • PCIe/PCI legacy extra slots • wide availability of components with low cost upgrades

6. IPFN’s ATCA-MIMO-ISOL“the star of the show” RTM ADC module

7. Leveraging on modularityATCA-32-Channel ADC Piggyback Module Characteristics Input range:+-/ 1 / 2.5 / 5 / 10 Volt, factory selectable Input impedance:Differential, 50Ω - 1M Ω, factory selectable Resolution:18 bit, (current assembly is AD7641 / 2 MSPS/18-bit) Anti-aliasing filter:analog, 18 dB, 3 poles, 500KHz (100kHz) Voltage isolation: 1kV (PER CHANNEL)

8. Leveraging on modularityChopped integrator for long duration pulses IPFN Prototype Characteristics Lower drift than normal analog integrators (suited for long pulse experiments) Magnetics signals converted into AC signal by analog switch and numerical integration in PC or FPGA. Conversion into AC signal cancels drift caused by operational amplifiers (present in normal integrators) Since integration is numerical, module will additionally provide unintegrated signals (for fluctuation analysis)

9. RFX proposal

10. RFX proposal • 2 ATCA shelves • 3 x 192 input channels with ATCA-MIMO-ISOL Board • Simultaneous acq. • PCIe fiber optical connection to controller • Input to RFX timing systems • 144 DACs and 144 DIOs in RTM(if required)

11. Leveraging on modularityATCA-32-Channel DAC Piggyback Module Can be developed if required and according toRFX specifications!

12. ATCA FPSC – alpha version GUI. It already implements shelf manager functions as well as EPICS/MARTe interface. ATCA FPSC – alpha version GUI. It already implements shelf manager functions as well as EPICS/MARTe interface. Collaborate on MARTe/EPICS development ATCA FPSC – alpha version GUI. Already implements shelf manager functions as well as EPICS/MARTe interface Relevant for collaboration with RFX

13. ATCA key advantages have been successfully demonstrated: • real-time data processing, e.g. JET, COMPASS, TCA-Br • MIMO fast control applications, e.g. JET • ATCA is being considered for critical fast plasma control systems, e.g. ITER, W7-X • Modularity • High availability • Reliability • Channel density per board • IPFN is looking forward to work on an ATCA based system for update of RFX feedback control