Open questions¶

What CORA needs the ESM team to confirm before the model can be trusted.

ESM was reverse-engineered from the beamline's own bluesky profile collection (NSLS2/esm-arpes-profile-collection), so the control handles in the Inventory are the beamline's real PVs, read from the startup/*.py files rather than confirmed by staff. Each row below is a fact the beamline team owns, not a CORA modelling choice (those are on Model, including the Manipulator graduation and the deferred XPEEM branch). It is a delete-on-answer queue. Priorities are Blocks-build, Blocks-go-live, and Nice-to-have.

Source and safety¶

ID	Priority	Question	CORA assumes	Resolves
SRC-1	Blocks-go-live	The two EPUs (EPU57 on G1A, EPU105 on G1B): periods, the polarization (phase) model, and how the pair is coordinated.	Two `InsertionDevice` Assets; the phase axis carried as a setting.	The insertion-device specs.
ENC-1	Blocks-go-live	Are the PV zones `XF:21IDA/B/C/D` separate shielded hutches or beam zones within fewer?	Four enclosures, one per zone.	The Enclosure grouping.
PSS-1	Blocks-go-live	The PSS search-and-secure permit signals for the hutches.	Permit leaves to be named; shutters are `XF:21ID-PPS{Sh:FE}` / `XF:21IDA-PPS{PSh}` / `XF:21IDC-PPS{PSh:1A/1B}`.	The Enclosure permit signals.
CTRL-1	Blocks-go-live	Are the EPICS PV handles read from the esm-arpes-profile-collection current and correct?	The handles in the descriptor are taken from the profile collection and carried confirm.	Verifying each Asset's control handle.

Optics¶

ID	Priority	Question	CORA assumes	Resolves
MONO-1	Blocks-go-live	The PGM: the grating line densities, the c-value model, and the energy range.	A `GratingMonochromator` Asset (catalog Family) with energy / focus-const / grating-pitch / mirror-pitch / grating-translation axes.	The monochromator model.
OPT-1	Nice-to-have	The mirrors (M1, M3 hexapod, M4A KB pair, M4B hexapod): coatings and axis roles.	`Mirror` Assets with the config's PV roots; coatings unconfirmed.	The mirror specs.
OPT-2	Nice-to-have	The PGM slits, the M3 slit, and the A/B exit slits: the internal axis maps.	`Slit` Assets with base PVs; per-blade axes partial.	The slit axis maps.
DIAG-1	Nice-to-have	The ESM Diagon (`XF:21IDA-OP{Diag:1`): is it a polarization diagnostic, and what does it report?	One `GenericProbe` Asset (placeholder classification).	The diagnostic classification.

ARPES endstation¶

ID	Priority	Question	CORA assumes	Resolves
ARPES-1	Blocks-build	The Scienta SES analyzer (`XF21ID1-ES-SES`): the model, the lens modes, the pass-energy and kinetic-energy-window controls, and the acquisition modes.	An `ElectronAnalyzer` Asset (catalog Family) presenting the Detector Role.	The analyzer model and lens / pass-energy controls.
SAMPLE-1	Blocks-go-live	The LT UHV cryostat manipulator: the live prefix (the config shows a provisional `{PRV` and a commented `{LT:1-Manip:EA5_1`), the six axes, the cryo range, and the sample-prep / load-lock chambers.	A `Manipulator` Asset (x/y/z + Rx/Ry/Rz) plus a `TemperatureController`.	The sample-environment model.
DET-1	Nice-to-have	The QuadEM flux monitors (qem01-12): which are I0 versus drain-current, and where each sits.	Two representative `FluxMonitor` Assets; the full set summarized.	The flux-monitor map.

Supplies¶

ID	Priority	Question	CORA assumes	Resolves
SUP-1	Nice-to-have	The vacuum and cryogen supplies the UHV optics, the analyzer, and the cryostat draw on.	Photon beam, cooling water, and vacuum carried in the descriptor.	The Supply records.