Libera Hadron is a BPM signal processing system developed especially for the needs of the hadron synchrotrons. It can be used for position measurement, tune measurement, and detailed beam studies.
- Deep memory buffers for offline studies
- High-resolution bunch-by-bunch position and charge measurements
- High resolution bunch-by-bunch arrival time measurements
- Slow data: high resolution beam position measurements and 10 Hz rate streaming towards the control system
- Fast data: high resolution beam position measurements and 10 kHz rate streaming on a dedicated output for fast feedback purposes
- Possibility of implementing low-latency multi-bunch instability feedback systems
The complete processing of data and its storage in buffers are initiated by the external trigger event signal. The data is stored in two 2 GB buffers which can be read out on the user’s request. Through real time signal processing algorithms, the system automatically detects individual bunches, measures the transversal positions at high resolution, the charge and the arrival time. The measurements can be organized in bunch maps in order to provide a global representation of the beam dynamics over long periods of time. Both Slow data and Fast data are available for the implementation of low latency feedback systems.
DSP AND DATA PATHS
Three standalone algorithms are implemented to support different types of pickup signal:
- Bunch-by-bunch for Shoe box sensors: a bunch detection algorithm with a baseline restorer for processing unipolar signals
- Bunch-by-bunch for capacitive sensors: a bunch detection algorithm for processing bipolar pulses
- Narrow band analysis: superheterodyne SDR receiver for processing bunch signals at extremely low bunch charges
Libera Hadron provides six basic data paths (raw ADC data, Bunch-by-bunch, FFT, FFT peak, Fast data and Slow data). GbE (optional) Fast data is available over SFP on the GDX using the GbE protocol. Fast data and Slow data are stream type and can be delivered to the user simultaneously: Fast data at 10 kHz and Slow data at 10 Hz. All the other data paths are data on demand type.
The hardware is based on MTCA standards, with a proprietary chassis, which accommodates up to four full-width and two half-width modules. It includes a high performance back-plane which satisfies even the most demanding applications. In addition there is a platform management controller and a COMe module which both support different CPU options.
Libera Hadron Performance
|Parameter||Typical value (RMS)|
|Bunch-by-bunch data||< 1 um|
|Fast data||< 100 nm|
Libera Hadron Parameters
|Number of input channels||16 (4 per module)|
|ADC resolution||16 bits|
|Max ADC sampling clock frequency||250 MHz|
|Memory size per module||4 Gbytes|
The GDX module extends the interconnection capabilities of the BPM electronics.
Kees ScheidtDiagnostics Head (ESRF, Grenoble)
On our Booster beam, we collected much data and features, that we could not measure or even detect before.
Engineering ExecutiveNDA locked
The prototyping and development Instrumentation Technologies has provided for our team has been exceptional.