void LoadLLB::loadTimeDetails(NeXus::NXEntry &entry) {
m_wavelength = entry.getFloat("nxbeam/incident_wavelength");
// Apparently this is in the wrong units
// http://iramis.cea.fr/Phocea/file.php?class=page&reload=1227895533&file=21/How_to_install_and_use_the_Fitmib_suite_v28112008.pdf
m_channelWidth = entry.getInt("nxmonitor/channel_width") * 0.1;
g_log.debug("Nexus Data:");
g_log.debug() << " ChannelWidth: " << m_channelWidth << '\n';
g_log.debug() << " Wavelength: " << m_wavelength << '\n';
}
/*
* 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);
}