NEBuLA. NumEriseur à Bande Large pour l Astronomie. Wide band digitizer for radioastronomy

Transcription

1 NEBuLA NumEriseur à Bande Large pour l Astronomie Wide band digitizer for radioastronomy Cedric Viou1, Daniel Charlet2 1 : Station de Radioastronomie de Nançay, Observatoire de Paris, PSL Research University, CNRS, Université d Orléans, Nançay, France 2 : Laboratoire de l'accélérateur Linéaire Université Paris XI, Orsay White-Rabbit

2 Agenda Instrumental collaboration The PAON-4 prototype NEBuLA hardware description Typical use for PAON-4 Other uses of Nançay 2

3 - IN2P3 and INSU, 2 Institutes of CNRS CNRS 10 institutes 1,100 research units (95% in partnership) 34,000 researchers, engineers, technicians 3.3 billion budget Centre National pour la Recherche Scientifique 3

4 BAO project in radio Fast aquisition system for 3D mapping of cosmological matter distribution in radio CEA/Irfu IN2P3/LAL CMU Fermilab colaboration D.Charlet,P.Abbon,C.Beigbeder,T.Caceres,H.Deschamps,B.Manssou, C.Paille,M.Taurigna 4

5 1600 m - Observations : - NRT, NRH, NDA, CODALEMA, LOFAR station - R&D : - EMBRACE - LSS NenuFAR - PAON 4 - Frequency Monitoring

6 Agenda Instrumental collaboration The PAON-4 prototype NEBuLA hardware description Typical use for PAON-4 Other uses of Nançay 6

7 Global configuration for PAON-4 ~ 8m AMPLI ~ 8m e AMPLI Main cabinet Ethernet/USB coaxial Mixer + LO AMPLI Power AMPLI ~40m 8 ~ 300m Shelter Patch Pannel 4 7

8 Data processing for off-line beamforming ADCs ADCs PFB/FFT PFB/FFT ADCs On-line Software correlator q ADCs 2048 chan fre 0.5 GS/s, 8 bits PFB/FFT PFB/FFT XCorr Off-line imaging 8 Acc HDD

9 Current analogue chain RF Board Antenna Gain=20DB 75 Ω 7m Gain=30DB 75 Ω 50m Pass band Filter Gain=1 9DB 1 RF 2 Low pass Mixer Filter IF Lowpass Filter I F LO=1.2GHZ RFout Local Oscillator LO Prototype Board 50MHz LO=1.2GHZ PLL Phase-locked loop RF Splitter 1/ RF board: 75 /50 inputs 2 channels per board Possibility of by-passing mixer to test the under-sampling approach. 9 ADC Gain=20DB RF Master Frequency 50 Ω 1m RF amplifier, mixer FPGA FFT

10 Current analog limitation SWR (long RF cables and wide bands) 10

11 NumEriseur à Bande Large pour l Astronomie Power T&C ADC ADC 11 NEBuLA PCIe 10GbE b Fi s r e

12 NEBULA Synoptic ADC08I1020 2x 1GSPS 1x 2GSPS Input bandwidth : 2Ghz 1Gb Eth-1G Eth-1G JTAG_conf PCIE x4 FPGA ctrl/cde & conf config IPMI µc SPI Eth-10G 10Gb PCIEpress 4x gen2 PCIExpress 4x EPLD MAXV I2C SPI PCIEx 4x (optionnel) Power CTRL DS SPI 10Gb LMK04828 SSRAM CY7C1470BV25 (CY7C1480BV25) Flash x 2

13 NEBULA FPGA content XTCA board ADC 2x 1GSPS 1x 2GSPS Input bandwidth : 2Ghz ARRIA V GT Numerical filter ADC & system management PCIEx 4x (optionnel) Ethernet 1G Local Oscillator 13 Test generator Data encapsulation PCIExpress 4x Gen2 20Gb/s 10Gb Ethernet 10Gb/s 10Gb Ethernet 10Gb/s Ethernet 1G

14 NEBULA clock tree WR clock system 100MHz 1 GHz WR MHz ADC08D MHz REFCLKR 1G WR REFCLKL CLKT_8A µtca PCIE WR 125 MHz WR 125 MHz WR 125 MHz WR 500 MHz CLKT µtca 1GbE ref_in DAC SPI REFCLKR WR DMTD CLK T ou B REFCLKR REFCLKL 25 MHz clk_out CLKT CLKB 10 MHz LMK MHz FPGA 125 MHz ref_in DAC 16b DAC AD5662 VCTCXO 25MHz DAC 16b AD5662 VCXO 20MHz 20 MHz REFCLKL 125 MHz Xtal MHz 14 Ext PCIE Xtal 50M MAX V 125 MHz SMA

15 NEBULA Power tree VCCL_GXB VCCR_GXB Seq 2 12 V from xtca crate or simple power supply Core 1.1v VCC Seq 1 EN23F2 1.1v Iout 15 EN23F2 Iout 15 VCCP EN v Seq 3 EN6347 Filter 3.6v 2.5v Filter Filter 1.5v Seq 3 EN v 3.3V Power-management EN6347 MAX5 Seq 5 Seq 5 Max Ena 2.2v MAX v ADC 2w max 0.8A MAX v Transceiver 1a max Other component PLL 0.7a max Stand-alone mode EN v MAX VCCIO VCPD VCCPGM VCCA_GXB VCCAUX VCCA_FPLL 2.5V SSRAM I/O VCCH_GXB VCCD_FPLL VCC_BAT Filter Seq 4 MAX8527 Iout 1a VCCT_GXB Filter 3.3v

16 Address bus optimized and assigned by the tool Ie: in Red the Bus Data_lsb 16

17 12 layers PCB Design xtca for Physics Std. 17

18 18

19 Agenda Science context The PAON-4 prototype NEBuLA hardware description Typical use for PAON-4 Other uses of Nançay 19

20 PCIE over cable 1 : On the shelf connection (OneStop optical cable), NEBULA limited length up to 300m (to be tested) EPCIe 4x Cuivre OSS-PCIe-CBL-x4 7m max Optique OSS-PCIe-CBL-x4 100m/300m max Cable adapter board to designed, MTP EPCIe 4x 3 : Custom connection cable, MTP Pictail Custom Cable adapter MTP Pictail NEBULA 20 PCIe-HIB25-x4-H 2 : Custom connection, no length limitation, NEBULA Cable adapter OSS- One the shelf pcie switch Active Cable MTP EPCIe 4x

21 PCIE over cable PCIExpress switch PCIe x4 cable adapter ipass connector 21 Ipass cables

22 PAON 4 System : PCIE version NEBULA NEBULA ADC White rabbit :Clock & trigger Distribution Command et control FPGA NEBULA ADC FPGA NEBULA ADC FPGA NEBULA ADC 22 FPGA External PCIExpress PCIExpress switch 20GByt/s by link 1Gb Ethernet

23 PAON 4 System : 10GbE + Uniboard NEBULA NEBULA ADC FPGA NEBULA ADC FPGA NEBULA ADC FPGA NEBULA ADC 23 White rabbit :Clock & trigger Distribution Command et control FPGA UNIBOARD (Visibilities) 10Gb Ethernet 1Gb Ethernet

24 Agenda Science context The PAON-4 prototype NEBuLA hardware description Typical use for PAON-4 Other uses of Nançay 24

25 Interferometry for AA qualification (candidate for SKA phase 2) 1 km NS 1.5 km of fiber Interferometry between an aperture array and a single dish antenna ~40 MHz near the 1.4 GHz RA band 1.5 km

26 NenuFAR : - LOFAR Super Station - Large Standalone LF radiotelescope

27 NenuFAR Radio Imager proposal For interferometry, Need to syntonize/synchronize : local 200MS/s 14 bits ADCs - ~ 10 remote ADCs

28 Conclusion Board bring-up schedule PCB production and assembly (April) Configuration and debug: (Mid 2016) - PLL & ADC - 10GbE - External PCIE - WhiteRabbit core Final version schedule (3rd quarter 2016) 28 Possible future enhancements - xtca single wide - High bandwidth link selection - Minipod for optical links - Integrate RF frontend test system - Integrate RF filters and amplifiers

29 NEBULA implementation on PAON IV FEED Antenna LNA ~ 30db RF Board ~ 4m NEBULA Board ~ 30db 0.5GHz ADC ~ 30db 29 ~ 4m ~ 30db 0.5GHz FPGA ~300m 10Gb ethernet PCIExpress