DECTRIS EIGER
Introduction
The EIGER 1M is a high performance X-Ray detector system. It is made of two subsystems: a detector and a control server. The control server is driven using an HTTP RESTful interface.
A C++ API for LImA has been developed at Synchrotron SOLEIL.
Prerequisite
Some dependencies need to be installed:
libcurl
liblz4
libzmq
libjsoncpp
to install all dependencies on debian like system, use this command:
$ sudo apt-get install libcurl4-gnutls-dev liblz4-dev libzmq3-dev libjsoncpp-dev
Installation and Module configuration
Follow the generic instructions in Build and Install. If using CMake directly, add the following flag:
-DLIMACAMERA_EIGER=true
For the Tango server installation, refers to PyTango Device Server.
Initialisation and Capabilities
Implementing a new plugin for new detector is driven by the LIMA framework but the developer has some freedoms to choose which standard and specific features will be made available. This section is supposed to give you the correct information regarding how the camera is exported within the LIMA framework.
Camera initialization
Initialization is performed automatically within the Eigercamera object. By default the stream will be use to retrieved images unless hardware saving is activated (CtSaving::setManagedMode(CtSaving::Hardware))
Std capabilities
HwDetInfo
Capability |
1M Value |
4M Value |
9M Value |
16M Value |
---|---|---|---|---|
Maximum image size |
1030 * 1065 |
2070 * 2167 |
3110 * 3269 |
4150 * 4371 |
Pixel depth |
12 bits |
12 bits |
12 bits |
12 bits |
Pixel size |
75µm * 75µm |
75µm * 75µm |
75µm * 75µm |
75µm * 75µm |
Maximum frame rate |
3000Hz |
750Hz |
238Hz |
133Hz |
HwSync
Supported trigger types are:
IntTrig
IntTrigMult
ExtTrigSingle
ExtTrigMult
ExtGate
There is no hardware support for binning or roi.
There is no shutter control.
Optional capabilities
Cooling
The detector uses liquid cooling.
The API allows accessing the temperature and humidity as read-only values.
Photon energy: This should be set to the incoming beam energy. Actually it’s an helper which set the threshold
Threshold energy: This parameter will set the camera detection threshold. This should be set between 50 to 60 % of the incoming beam energy.
Auto Summation (if activate image depth is 32 and, if not image depth is 16)
HwSaving: This detector can directly generate hdf5, if this feature is used. Internally Lima controls the file writer Eiger module. This capability can be activated though the control part with CtSaving object with setManagedMode method.
Countrate correction
Efficiency correction
Flatfield correction
LZ4 Compression
Virtual pixel correction
Pixelmask
Retrigger
Configuration
Device configuration
The default values of the following properties must be updated in the specific device to meet your system configuration.
Property name |
Description |
Default value |
---|---|---|
DetectorIP |
Defines the IP address of the Eiger control server (ex: 192.168.10.1) |
127.0.0.1 |
How to use
This is a python code of a simple acquisition:
from Lima import Eiger
from lima import Core
#------------------+
# |
# v ip adress or hostname
cam = Eiger.Camera(lid32eiger1)
hwint = Eiger.Interface(cam)
ct = Core.CtControl(hwint)
acq = ct.acquisition()
# set hardware configuration
# refer to the Dectris Eiger documentation for more information
cam.setCountrateCorrection(False)
cam.setFlatfieldCorrection(True)
cam.setAutoSummation(False)
cam.setEfficiencyCorrection(True)
cam.setVirtualPixelCorrection(True)
cam.setPixelMask(True)
# read some parameters
print (cam.getTemperature())
print (cam.getHumidity())
# set energy threshold in eV
cam.seThresholdEnery(16000)
cam.setPhotonEnergy(8000)
# setting new file parameters and autosaving mode
saving=ct.saving()
pars=saving.getParameters()
pars.directory='/buffer/lcb18012/opisg/test_lima'
pars.prefix='test1_'
pars.suffix='.edf'
pars.fileFormat=Core.CtSaving.EDF
pars.savingMode=Core.CtSaving.AutoFrame
saving.setParameters(pars)
# set accumulation mode
acq_pars= acq.getPars()
# now ask for 10 msec exposure and 10 frames
acq.setAcqExpoTime(0.01)
acq.setAcqNbFrames(10)
ct.prepareAcq()
ct.startAcq()
# wait for last image (#9) ready
lastimg = ct.getStatus().ImageCounters.LastImageReady
while lastimg !=9:
time.sleep(1)
lastimg = ct.getStatus().ImageCounters.LastImageReady
# read the first image
im0 = ct.ReadImage(0)