Detector¶
The detectors that make ISS an absorption + emission beamline: the transmission / fluorescence ion chambers, the silicon-drift fluorescence detector, the area detector, and the two crystal emission spectrometers (Johann and von Hamos). PVs verified against the iss-profile-collection startup files.
Enclosure: 8-ID-B.
Note
Which detector is read decides the technique: the ion chambers (I0 / It / Ir) for transmission EXAFS, the Xspress3 silicon-drift array for fluorescence EXAFS, and the Johann or von Hamos crystal emission spectrometer for XES and HERFD. The emission spectrometers are the signature ISS instruments; both bind the EmissionSpectrometer family (graduated, LCLS-MFX + ISS). The full per-detector channel map is DET-1.
| Name | Family | PV | Key specs | Replaceable | Status |
|---|---|---|---|---|---|
IonChambers |
FluxMonitor |
XF:08IDB-CT{Amp-I0} |
The transmission / fluorescence ion chambers I0 / It / Ir / If, read through configurable amplifiers (the in-house ICAmplifier at XF:08IDB-CT{Amp-I0 / It / Ir / If} and, currently, Keithley 428 preamps at XF:08ID-ES:{K428}:A-D:) and digitized by the analog pizza box (XF:08IDB-CT{PBA:1}); each chamber rides a vertical positioner XF:08IDB-OP{IC-Ax:Y:1-3}Mtr. Reuses the FluxMonitor family (graduated #353). The channel-to-chamber map is DET-1. | confirm |
|
FluorescenceDetector |
EnergyDispersiveSpectrometer |
XF:08IDB-ES{Xsp:1}: |
A four-channel silicon-drift fluorescence detector read by an Xspress3 (XF:08IDB-ES{Xsp:1}: channels C1-C4, with per-channel ROIs and an HDF5 stream) for fluorescence EXAFS. Reuses the EnergyDispersiveSpectrometer family. Element count and ROI map pending (DET-1). | confirm |
|
AreaDetector |
Camera |
XF:08IDB-ES{Det:PIL1}: |
A Pilatus 100k pixel-array detector (XF:08IDB-ES{Det:PIL1}; a second Pilatus PIL2 is also defined) reading the emission-spectrometer focus and 2D patterns. Reuses the Camera family. Which detector is live per spectrometer is DET-1. | confirm |
|
JohannSpectrometer |
EmissionSpectrometer |
XF:08IDB-OP{HRS:1- |
The Johann high-energy-resolution crystal emission spectrometer (XES / HERFD): a Rowland-circle back-scattering analyzer composing a main crystal plus four auxiliary crystals (XF:08IDB-OP{HRS:1-Stk:1-5:X / Y / Roll / Yaw}Mtr) on a Y assembly (XF:08IDB-OP{HRS:1-Ana:Assy:Y}Mtr) with a two-theta detector arm (XF:08IDB-OP{HRS:1-Det:Gon:Theta1 / Theta2}Mtr). Binds the EmissionSpectrometer family (graduated): ISS is the SECOND sighting after LCLS-MFX's von Hamos XES spectrometer (SPEC-1). Crystal cut, Rowland radius, and whether each analyzer crystal is a child Asset are SPEC-1. | confirm |
|
VonHamosSpectrometer |
EmissionSpectrometer |
XF:08IDB-OP{MC:3-Ax: |
The von Hamos wavelength-dispersive crystal emission spectrometer (XES; a cylindrically-bent crystal spreading the emitted spectrum onto the area detector, motors XF:08IDB-OP{MC:3-Ax:} for the assembly and crystal, sharing the XF:08IDB-OP{HRS:1-Det} detector arm; a separate FIP von Hamos sits at XF:08IDB-OP{FIP-VHS:Stage1 / 2}). Binds the EmissionSpectrometer family (graduated). Crystal cut and geometry are SPEC-1. | confirm |