FEATURES
• Accepts input signals directly from detector preamplifier outputs or scintillator/PMT combinations.
• Signals digitized with 100-500 MSPS, 14-16 bit ADC.
• Synchronous acquisition of waveforms up to 163μs in length.
• Spectrum from 1K to 32K bins, up to 4.3 billion counts per bin.
• Onboard CFD trigger with adjustable parameters.
• List mode data buffered to allow zero dead-time acquisition.
• PXI backplane trigger distribution and run synchronization.
• Full speed 32-bit, 33 MHz PCI interface to host computer, up to 109 MBytes/s readout sustained.
| APPLICATIONS • Segmented germanium detectors. • Silicon Strip Detectors. • Arrays of scintillation detectors. • Synchronous waveform capture for gamma- ray tracking. • Sub-nanosec timing measurements. • Mixed systems with different detector types. |
All Pixie-16 variants (14-16 bit, 100-500 MSPS) can be operated simltaneously within the same crate with the same software interface.
SPECIFICATIONS | |
Front Panel I/O • 16 analog signal inputs, (SMB). Impedance 50 Ω or 1 kΩ or 4kΩ with jumper selectable 50 Ω input termination. • 28 digital inputs/ouputs, including 4 high speed LVDS input/ output connections, 16 LVDS inputs for channel specific gating, LVTTL inputs and outputs for general purpose. • Option for external clock through front panel input.
Backplane I/O • Low skew system clock distributed to all modules. • Trigger, run synchronization, and global veto lines. • ~150 configurable connections for complex trigger logic, multiplicity information, or data transfers between modules. Data Reported • Energy spectra. • List mode data: Energies, timestamps (48-bit), QDC sums and waveforms. • Run statistics. | Pulse Processing • Signal digitized at 100, 250 or 500 MSPS, 14 or 16 bit. • Broad range of peaking times, (varies with digitization rate). • Differential Non-Linearity < 0.5 LSB. • Integral Non-Linearity < 0.57 LSB/14-bit or <0.38 LSB/ 12-bit for a dynamic range of 3 MeV. • Waveform capture at full ADC rate. (10, 4 or 2 ns sampling).
Digital Controls • Input: Choice of two termination/attenuation options. Full scale range ± 2V pp. • Gain: Fixed analog voltage gain; digital adjustement ±10%. • Offset: -1.5V to 1.5V in 65536 steps. • Filter: Rise time and flat top: 0.02 - 80μs in small steps.
CompactPCI/PXI System • 6U form factor with standard 3U cPCI/PXI 32-bit, 33 MHz interface. • Customized power supplies and backplane I/O. |