Sample¶
The sample positioning stage, the sample rotator, and the in-situ temperature environments at 12-ID-E. Scaffold; PVs read from the bluesky/BITS instrument config (github.com/BCDA-APS/usaxs-bits), carried confirm.
The USAXS sample side places the specimen between the matched Bonse-Hart crystal stages: the collimator rocks the beam onto the sample, the analyzer rocks downstream of it (both are USAXS optics on the Source walk, since the rocking-curve scan against the collimator is the USAXS measurement). At the sample itself, a positioning stage sets where the specimen sits in the beam, a rotator turns it, and one of two temperature controllers conditions the in-situ thermal environment. None of these is a new device class; each binds an existing catalog Family.
The sample stack (12-ID-E)¶
| Device | Family | PV | Design spec / note |
|---|---|---|---|
SampleStage |
LinearStage |
usxLAX: |
sample positioning stage; which translation axes are mounted is SAMPLE-1 |
SampleRotator |
RotaryStage |
usxPI:c867:c0:m1 |
PI C-867 sample rotator (SAMPLE-1) |
LinkamStage |
TemperatureController |
usxLINKAM:tc1: |
Linkam T96 temperature stage; presents the Regulator Role (TEMP-1) |
Ptc10Controller |
TemperatureController |
usxTEMP:tc1: |
PTC10 multi-channel temperature controller; presents the Regulator Role (TEMP-1) |
The positioning stage and rotator¶
The SampleStage binds the catalog LinearStage Family: it is a pure-translation positioning stage that sets where the specimen sits in the beam. Its precise axis set, and what is mounted on it for a given measurement, is SAMPLE-1.
The SampleRotator binds the catalog RotaryStage Family. It is the PI C-867 rotator on usxPI:c867:c0:m1, turning the sample about its own axis. This is the same Family the Bonse-Hart collimator and analyzer crystal stages bind on the Detector side: the operative axis there is the crystal rocking rotation, here it is the sample rotation, and a rotary positioning stage is the shared anatomy. The vendor name (PI C-867) is carried because it is read from the config; the rotator's serial and physical mounting are not in the config and stay SAMPLE-1.
In-situ temperature environment¶
Two temperature controllers serve the sample environment, and both bind the graduated catalog TemperatureController Family, presenting the Regulator Role:
- the Linkam T96 temperature stage on
usxLINKAM:tc1:, and - the PTC10 multi-channel temperature controller on
usxTEMP:tc1:.
This is the same Family three Diamond beamlines and IXS already use for their sample environments, so 12-ID-E coins nothing new for thermal control. The two units' temperature ranges, the PTC10's channel count, and whether the Linkam and the PTC10 coexist on a single measurement or are exchanged depending on the sample is TEMP-1.
Deferred: the in-situ load frame¶
An in-situ load frame exists in the beamline's device library (loadframe.py) but is not in the active instrument config, so CORA does not model it and coins no Family for it. No Family is earned for an un-instantiated device; the load frame is named here only so the reader knows the in-situ surface is not yet fully drawn (LOADFRAME-1).
Why no new Family here¶
The sample side tempts no new device class. The positioning stage and the sample rotator are ordinary translation and rotation stages (LinearStage, RotaryStage). The Linkam and PTC10 are settable thermal regulators (TemperatureController), the same shape Diamond and IXS already carry. The one device that could read as novel, the in-situ load frame, is deferred rather than modelled (LOADFRAME-1).
See Open questions for the sample-side facts still to confirm, and Inventory for the Asset tree.