/**
* Init names of sample logs based on instrument specific NeXus file
* entries
*
* @param entry :: the NeXus file entry
*/
void LoadILLReflectometry::initNames(NeXus::NXEntry &entry) {
std::string instrumentNamePath = m_loader.findInstrumentNexusPath(entry);
std::string instrumentName =
entry.getString(instrumentNamePath.append("/name"));
if (instrumentName.empty())
throw std::runtime_error(
"Cannot set the instrument name from the Nexus file!");
boost::to_lower(instrumentName);
if (instrumentName == "d17") {
m_instrument = Supported::D17;
} else if (instrumentName == "figaro") {
m_instrument = Supported::Figaro;
} else {
std::ostringstream str;
str << "Unsupported instrument: " << instrumentName << '.';
throw std::runtime_error(str.str());
}
g_log.debug() << "Instrument name: " << instrumentName << '\n';
if (m_instrument == Supported::D17) {
m_detectorDistanceName = "det";
m_detectorAngleName = "dan.value";
m_sampleAngleName = "san.value";
m_offsetFrom = "VirtualChopper";
m_offsetName = "open_offset";
m_chopper1Name = "Chopper1";
m_chopper2Name = "Chopper2";
} else if (m_instrument == Supported::Figaro) {
// For Figaro, the DTR field contains the sample-to-detector distance
// when the detector is at the horizontal position (angle = 0).
m_detectorDistanceName = "DTR";
m_detectorAngleName = "VirtualAxis.DAN_actual_angle";
m_sampleAngleName = "CollAngle.actual_coll_angle";
m_offsetFrom = "CollAngle";
m_offsetName = "openOffset";
// Figaro: find out which of the four choppers are used
NXFloat firstChopper =
entry.openNXFloat("instrument/ChopperSetting/firstChopper");
firstChopper.load();
NXFloat secondChopper =
entry.openNXFloat("instrument/ChopperSetting/secondChopper");
secondChopper.load();
m_chopper1Name = "CH" + std::to_string(int(firstChopper[0]));
m_chopper2Name = "CH" + std::to_string(int(secondChopper[0]));
}
// get acquisition mode
NXInt acqMode = entry.openNXInt("acquisition_mode");
acqMode.load();
m_acqMode = acqMode[0];
m_acqMode ? g_log.debug("TOF mode") : g_log.debug("Monochromatic Mode");
}
/*
* Loads metadata present in the nexus file
*/
void LoadILLSANS::loadMetaData(const NeXus::NXEntry &entry,
const std::string &instrumentNamePath) {
g_log.debug("Loading metadata...");
API::Run &runDetails = m_localWorkspace->mutableRun();
int runNum = entry.getInt("run_number");
std::string run_num = std::to_string(runNum);
runDetails.addProperty("run_number", run_num);
if (entry.getFloat("mode") == 0.0) { // Not TOF
runDetails.addProperty<std::string>("tof_mode", "Non TOF");
} else {
runDetails.addProperty<std::string>("tof_mode", "TOF");
}
std::string desc =
m_loader.getStringFromNexusPath(entry, "sample_description");
runDetails.addProperty("sample_description", desc);
std::string start_time = entry.getString("start_time");
start_time = m_loader.dateTimeInIsoFormat(start_time);
runDetails.addProperty("run_start", start_time);
std::string end_time = entry.getString("end_time");
end_time = m_loader.dateTimeInIsoFormat(end_time);
runDetails.addProperty("run_end", end_time);
double duration = entry.getFloat("duration");
runDetails.addProperty("timer", duration);
double wavelength =
entry.getFloat(instrumentNamePath + "/selector/wavelength");
g_log.debug() << "Wavelength found in the nexus file: " << wavelength << '\n';
if (wavelength <= 0) {
g_log.debug() << "Mode = " << entry.getFloat("mode") << '\n';
g_log.information("The wavelength present in the NeXus file <= 0.");
if (entry.getFloat("mode") == 0.0) { // Not TOF
throw std::runtime_error("Working in Non TOF mode and the wavelength in "
"the file is <=0 !!! Check with the instrument "
"scientist!");
}
} else {
double wavelengthRes =
entry.getFloat(instrumentNamePath + "/selector/wavelength_res");
runDetails.addProperty<double>("wavelength", wavelength);
double ei = m_loader.calculateEnergy(wavelength);
runDetails.addProperty<double>("Ei", ei, true);
// wavelength
m_defaultBinning[0] = wavelength - wavelengthRes * wavelength * 0.01 / 2;
m_defaultBinning[1] = wavelength + wavelengthRes * wavelength * 0.01 / 2;
}
// Put the detector distances:
// std::string detectorPath(instrumentNamePath + "/detector");
// // Just for Sample - RearDetector
// double sampleDetectorDistance =
// m_loader.getDoubleFromNexusPath(entry,detectorPath + "/det2_calc");
// runDetails.addProperty("sample_detector_distance",
// sampleDetectorDistance);
}
