Photon Doppler Velocimetry
using ADP7104 high speed digitizers
- Four channels with 10 GHz Analog Bandwidth, 32 Gsa/s 10-bit ADP7104 or
- Eight channels with 6.5 GHz Analog Bandwidth, 16 Gsa/s 10-bit shown
- Per-channel low-noise front-end (-32 dBm to +22 dBm with 1 dB range steps)
- Spurious-free dynamic range (SFDR) down-to -70 dBc @ DC – 3 GHz
- 3.2 second captures at full bandwidth to internal 256 GByte memory, plus
- Dedicated Optical Data Interfaces (ODI): to offload and capture even longer trace depths to RAID
- Typical Channel-to-Channel synchronization timing alignment skew <=5 picoseconds in multi-digitizer systems
Photon Doppler Velocimetry (PDV) is a one-dimensional Fourier transform analysis of a heterodyne laser interferometry. It was developed at Lawrence Livermore National Laboratory and is used in the shock physics community to measure velocities in dynamic experiments with high temporal precision. In the growing field of number of scientific and technical applications, including shock physics, the study of material properties, hypervelocity impact testing, detonics and shock wave experiments.
The events that are analyzed are typically “one shot” wide frequency band and long lasting events. The PDV system has to be able to provide high signal fidelity acquisition for extended periods of time across multiple analog channels (Sometimes for 100-s of sensors).
Guzik ADP7104 high-speed digitizer is perfectly tailored to address the PDV application. It provides 4 x 6.5 GHz or 2 x 10 GHz analog channels coupled with patented real-time Analog-to Digital Converter (ADC) mismatch equalization technology, for superior SFDR (Spurious Free Dynamic Range) and long acquisition memory (3+ seconds each channel with 256 GByte memory option).
Each analog input channel has an adjustable 10 GHz front-end, which can be tuned from -32dBm to +22dBm Full Scale sensitivity.
The digitizers are designed to be synchronized across multiple digitizers and provide analog-channel synchronization skews within 5ps std without uncertainties. Each digitizer has the synchronization hardware built-in. No need for external/additional synchronization modules.
The digitizers feature fast-offloading capabilities via PCIe or Optical Data Interfaces, which can be couple with GPU-based fast FFT computing solution to provide superior throughput for the PDV event analysis.
An 8-channel 6.5 GHz or 4 -channel 10 GHz PDV acquisition system with two ADP7104 digitizers is pictured below in a Keysight AXIe M9505A modular chassis:
For more information contact us at sales@guzik.com