Short introduction Pulsar Parkes

Outline PDFB – Single beam pulsar timing system CASPER – Single beam pulsar coherent dedispersion system BPSR – 13 beam pulsar, burst search system

PDFB: Pulsar Digital Filter Bank Single pixel incoherent dedispersion using FPGAs Hardware 20p FPGAs 1p server Software FPGA based PFB

PDFB PDFB’s sampler samples two polarization analog signals to 1 GSps with 10 bit, the data feeds into a reconfigurable PFB, after integration and folding for every channel, the data goes into a server where psrfits files are generated.

CASPSR: CASPER Parkes Swinburne Recorder Single pixel phase-coherent dispersion removal using GPU Hardware 1p Interconnect Break-out Board (IBOB); 1p Cisco® SFS 7000 InfiniBand Server Switch; 2p Dell R610 demux Server Nodes, each with 48 GB of RAM; 4p Supermicro® NITRO G5 Tesla GPU Compute Nodes, each with dual quad-core Intel® Xeon E5520 (Nehalem-EP) processors, 24 GB of RAM, and 2 NVIDIA Tesla C1060 GPUs with 4GB of memory; 2p 48T RAID storages. Software routed, managed, and monitored using PSRDADA; coherently dedispersed and reduced in real-time using DSPSR; archived for later analysis using PSRCHIVE.

CASPSR The IBOB performs analog-to-digital conversion of two dual- polarization signals, each with a maximum total bandwidth of 400 MHz. These signals are streamed via 2 × 10 GbE connections to the 2 R610 servers, which buffer the data and remultiplex the UDP packets to deliver contiguous streams to the 4 GPU-based processing nodes. Every 8 seconds’ data folded into one profile or dumped as one baseband data file Time resolution: 1.25e-9s, dynamic range: 8bit

CASPSR detailed data path Analog signal converts to 800MSps digital data using IBOB IBOB transfer the data to 2 demux servers via 2 10 GbE Demux servers send data to 4 GPU-based servers via 20 Gb InfiniBand If baseband data recording GPU servers write the unprocessed data to RAID Else real time coherent dedispersion 512K FFT Multiply the chirp function 512 × 1K IFFT Detect Fold Record

BPSR: Berkeley Parkes Swinburne Recorder 13 pixel pulsar, burst search using GPU Hardware 13p Interconnect ROACH(IBOB); 1p 20Gbps InfiniBand switch; 7p 2 Tesla GPUs; 2p 48T RAID storage. Software routed, managed, and monitored using PSRDADA; summed, normalized, decimated to 2 bits per sample, and written to disk in real-time using DSPSR.

BPSR The ROACH boards perform analog-to-digital conversion of two dual-polarization signals, each with a bandwidth of 400 MHz. These signals are sub-divided into 1024 frequency channels using a polyphase filter bank, detected, integrated, decimated to 8 bits on ROACH, and streamed to 7 server-class nodes, each directly connected to a ROACH via 10 GbE CX4. Time resolution: 32 microseconds, dynamic range: 2bit

BPSR detailed data path Analog signal converts to 800MSps digital data using ROACH for every pixel ROACH makes 1024-channel polyphase filter bank, detects, integrates every channel for a few microseconds and decimates to 8 bits Every two pixels’ data is sent to one server with 2 GPUs GPU does real time DM search GPU servers write the integrated, normalized, decimated to 2 bits data to RAID

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