SETI Spectrometer Development for ALFA Laura Spitler CASPER Workshop II 3 August 2008
Collaboration UC Berkeley Cornell University / NAIC Dan Werthimer Andrew Siemion CASPER group SSL SETI group Cornell University / NAIC Laura Spitler Jim Cordes
Arecibo Observatory
ALFA receiver system 1.4 GHz 7 feeds 300 MHz BW Surveys PALFA ALFALPHA
SETI ALFA Survey Bandwidth: 200 MHz (300 MHz) Number of channels: 128 Mchannels ~ 1.5 Hz Data rate: ~1 Mbyte/sec (more later?)
SETI spectrometer
SETI spectrometer hardware First generation iADC + iBOB + BEE2 Multiplex beams and polarization Second generation 7 ROACH boards
ADC + DDC + XAUI (iBOB)
4k PFB (BEE2)
Corner Turner & FFT (BEE2) 32k x 4k matrix transpose FFT 32k
Thresholder and Data Recorder Record events to Shared FIFO accessible via BORPH Read out as UDP packets via 10 Mb Ethernet Transfer data to Cornell / Berkeley via internet
SERENDIP pipeline Cleans raw data Prepares for database RFI extraction Candidate generation
Post processing