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CASPER van Leeuwen
ASTRON
Science goals Searching for new pulsars Special individual systems as extreme physics labs, and understanding population as whole. Timing Find gravitational wave background, test theories
- f gravity.
CASPER Pulsar Instruments C A SPER Science goals van Leeuwen - - PowerPoint PPT Presentation
CASPER Pulsar Instruments C A SPER Science goals van Leeuwen - - PowerPoint PPT Presentation
CASPER Pulsar Instruments C A SPER Science goals van Leeuwen ASTRON Searching for new pulsars Special individual systems as extreme physics labs, and understanding population as whole. Timing Find gravitational wave background, test theories
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CASPER van Leeuwen
ASTRON
Hurdles Remove interstellar signal dispersion Many rough trials; very precisely once known.
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CASPER van Leeuwen
ASTRON
Hurdles Remove interstellar signal dispersion Many rough trials; very precisely once known. De-dispersion: incoherent vs. coherent Incoherent: time freq
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CASPER van Leeuwen
ASTRON
Hurdles Remove interstellar signal dispersion Many rough trials; very precisely once known. De-dispersion: incoherent vs. coherent Coherent: time freq
SLIDE 7
CASPER van Leeuwen
ASTRON
Hurdles Remove interstellar signal dispersion Many rough trials; very precisely once known. De-dispersion: incoherent vs. coherent Coherent: time freq
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CASPER van Leeuwen
ASTRON
Existing pulsar hardware ASP Family of pulsar machines (AO, GB, Nançay) 8-bit sampling Modest bandwidth of 128MHz Serendip 5 PFB into 32 x 4MHz sub bands 4 Gbps to ~20 dual CPU 2004 Opterons. General use when not observing (PALFA, GBT searching)
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CASPER van Leeuwen
ASTRON
New pulsar hardware GUPPi digital filterbank, planned coherent dedisperser 2 iBOBs + 1 BEE (cf. John Ford talk) Berkeley ATA pulsar processor (BAPP) digital filterbank up to 200MHz 1 iBOB (cf. Peter McMahon talk)
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CASPER van Leeuwen
ASTRON
Upcoming pulsar hardware GUPPi coherent dedisperser 2 iBOBs + 1 BEE (cf. John Ford talk) ASP-family upgrades coarse PFBs to channelise data for CPU cluster 1 iBOB for 400MHz BW sep08: BON @ Nançay GPU-powered codedi cluster mid09: ASP @ Arecibo upgrade? (also GAVRT , Parkes, Effelsberg)
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CASPER van Leeuwen
ASTRON
Future pulsar hardware LOFAR software based (BG/P + CPU cluster), flexible number of beams on sky (up to ~1000) APERTIF 25-beam focal plane array for WSRT correlator/beamformer design TBD include 25 pulsar backends
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CASPER van Leeuwen
ASTRON