Speaker
Mr
Mircea Bogdan
(The University of Chicago)
Description
A data acquisition (DAQ) system using 10-15 Gigasamples/second (Gsa/s) waveform sampling Application Specific Integrated Circuits (ASICs) for the readout of large active-area micro-channel plate photomultiplier tubes (MCP-PMTs) is presented. The development and characterization of these 20x20 sq. cm active-area MCP `tiles' are ongoing by the Large-Area Picosecond Photo-Detector Collaboration (LAPPD). Signals from the large-area MCP tile are acquired from a 50-ohm transmission line anode comprised of 30 parallel microstrips. The position, timing, and energy of the incident pulse are extracted from the waveforms that are recorded at both ends of the anode. The target geometry of the DAQ system is the very large-active area `Super-module', made of a 2x3 array of LAPPD MCP tiles, that requires 60 channels of compact, high bandwidth waveform sampling on both sides of the detector. For this task, a 6-channel, 15 Gsa/s, and 1.5 GHz bandwidth waveform digitizing ASIC, 'PSEC-4', was designed in 0.13 micron CMOS using a 256 sample-per-channel switched capacitor array architecture. Sampled waveforms are digitized on-chip and a region-of-interest in the data buffer is serially read off-chip for downstream analysis. The Super-module DAQ incorporates two hardware levels of FPGA-implemented ASIC control and waveform feature extraction. Ultimately, the reduced event data are sent to a computer via a gigabit Ethernet connection.
for the collaboration
On behalf of LAPPD collaboration
Primary author
Mr
Mircea Bogdan
(The University of Chicago)
Co-authors
Mr
Aaron Meyer
(The University of Chicago)
Mr
Craig Harabedian
(The University of Chicago)
Mr
Eric Oberla
(The University of Chicago)
Prof.
Gery Varner
(The University of Hawaii)
Prof.
Henry Frisch
(The University of Chicago)
Mr
Herve Grabas
(Orsay, France)
Mr
Jean-Francois Genat
(IN2P3 Paris)
Dr
Kurtis Nishimura
(The University of Hawaii)
Mr
Maxwell Hutchinson
(The University of Chicago)
