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Libera Spark ERXR is a compact electron beam position processor that offers high-precision position measurement. It is optimized to work with button and stripline pickups. The digital signal processing supports detailed adjustment of the processing window and position measurement in various regimes and bandwidths. Optionally, it supports the pilot tone processing, too. The data available to the user ranges from bunch-to-bunch, turn-by-turn to slow data stream. The instrument is typically used in booster or storage rings.
Benefits:
Data Processing:
Signals from the BPM pickups are filtered and sampled at 100-125 MHz PLL-controlled sampling frequency. Raw ADC data is stored in a buffer and further processed through a time-domain processing block (TDP) and frequency-domain processing block (DDC, I&Q demodulation). Optionally, a special instrument’s version supports additional DDC block for pilot-tone signal.
The turn-by-turn processing blocks can be fine-tuned with processing delay, offset and masking window. Turn-by-turn data from both sources is written to circular buffers which accommodate few millions of turns. Data can be read in various modes: triggered, on-demand, with +/- offset, etc.
Turn-by-turn data from the Time domain processing block is particularly useful for machine commissioning and/or measurement of a single-bunch single-turn trajectory.
The Fast and Slow data are both generated from the turn-by-turn data using FIR filters with 2 kHz and 5 Hz bandwidths, respectively. Optionally, the Fast data can be output through a dedicated RJ-45 interface as a real-time data stream.
Interfaces:
Libera Spark ERXR | |
---|---|
General product code | LSXR |
Input frequency range | < 750 MHz |
Maximum input signal | < -10 dBm (continuous) |
A/D conversion | 125 MHz, 14-bit |
Calibration | Look-up table / Pilot tone |
Gain/attenuation | 31 dB programmable |
Real-time data link | RJ-45, GbE |
Power supply | Power-over-Ethernet (<15 W) |
Timing signals | Electrical, 3 inputs |
Typical value | |
---|---|
Temperature drift, typical | < 2 μm/°C |
Position RMS at turn-by-turn data rate | 0.3 μm |
Position RMS at fast 10 kHz data rate | 0.04 μm |
Position RMS at slow 10 Hz data rate | 0.02 μm |
Position RMS at single bunch | < 10 μm |
The instrument runs on a Libera BASE software infrastructure. The infrastructure supports various plugins (interface servers) that are compatible with most common control system interfaces on users’ side:
Graphical user interface for TANGO users is built by the AtkPanel tool automatically. EPICS users have various options: from EDM, caQtDM to CSS.
As an example, the gallery below shows the GUI panels built on the EDM technology.
Libera Spark ERXR is used at the following labs:
Can’t find your discipline or profession? Write to us and we’ll
do our best to work something out.
We adjust our services to your needs.