Source

The incident beam, produced, conditioned, and defined before the sample. A walk along the source-stage devices; the sample and detection stages are documented as their own composed-fixture pages, the controllers that drive these devices are on the Controls page, and the supplies they draw on are in Operations. Each device pairs its human name with the EPICS handle, its key specs, and whether it is field replaceable. new marks a device not yet modeled in CORA; confirm marks a value taken from the docs that staff have not yet verified.

Generated from the descriptor

This page is generated from the descriptor at deployments/fxi/beamline.yaml. Edit the descriptor, not this page. For the CORA Asset model, settings, vendor catalog, drawings, and wiring, see Inventory.

Property	Value
Facility	nsls2
Sector	Sector 18
Tier	Unit
Source	insertion-device (confirm: insertion-device type (undulator vs damping wiggler) and parameters are not in the public profile collection (SRC-1))

Enclosures

Enclosure	Role	Facility	Permit signal
18-IDA	optics-hutch	nsls2	confirm: only the PPS photon-shutter status XF:18IDA-PPS{PSh}Pos-Sts is in source; the PSS search-and-secure permit leaf is unknown (PSS-1)
18-IDB	experiment-hutch	nsls2	confirm: PSS search-and-secure permit leaf unknown; the XF:18ID1-ES namespace may be a distinct endstation area (ENC-1)

Source

The insertion-device source delivering the beam to the optics hutch.

Enclosure: 18-IDA.

Name	Family	PV	Key specs	Replaceable	Status
Source	InsertionDevice		18-ID insertion device. Type (undulator vs damping wiggler), period, gap, and power are not in the public profile collection (SRC-1); recorded as a Supply (PhotonBeam) at the Site, identity-only here.		new confirm

Optics

Condition the beam and set its energy. The double-crystal monochromator, two mirrors, the white-beam slit, attenuating filters, and the flux diagnostics.

Enclosure: 18-IDA.

Note

PV prefixes are verified against startup/12-optics_motor.py and startup/10-area-detector.py of NSLS2/fxi-profile-collection. No vendor model is bound (part numbers unknown); the mirror role labels and crystal cut are carried confirm.

Name	Family	PV	Key specs	Replaceable	Status
Monochromator	Monochromator	XF:18IDA-OP{Mono:DCM	axis channels: {'Th1': 'XF:18IDA-OP{Mono:DCM-Ax:Th1}Mtr', 'Th2': 'XF:18IDA-OP{Mono:DCM-Ax:Th2}Mtr', 'Chi2': 'XF:18IDA-OP{Mono:DCM-Ax:Chi2}Mtr', 'Dy2': 'XF:18IDA-OP{Mono:DCM-Ax:Dy2}Mtr', 'Energy': 'XF:18IDA-OP{Mono:DCM-Ax:En}Mtr'} crystal cut: Si (cut unknown, DCM-1) Double-crystal monochromator (class DCM). The Energy axis (-Ax:En) is the master energy handle; it is the same EPICS record CORA exposes as the XEng computed axis below. Th2 and Chi2 carry IOC-level PID fine feedback (-Ax:Th2}PID.FBON, -Ax:Chi2}PID.FBON): a closed loop that stays on the floor, not driven by CORA. Crystal cut and energy range pending (DCM-1).
	confirm
CollimatingMirror	Mirror	XF:18IDA-OP{Mir:CM	First mirror (class mirror, instance cm). The "collimating" role label is inferred from the cm name and is carried confirm: both FXI mirrors are the same ophyd class with no role string in source (OPTIC-1). Has a piezo bender with a load-cell (force readout); bender control stays on the floor.
	confirm
ToroidalMirror	Mirror	XF:18IDA-OP{Mir:TM	Second mirror (class mirror, instance tm). The 'toroidal' role label is inferred from the tm name, carried confirm (OPTIC-1).		confirm
WhiteBeamSlit	Slit	XF:18IDA-OP{PBSL:1	White-beam-defining slit (class PBSL). Named gap/center axes; blade-axis suffixes pending (OPTIC-2).		confirm
SecondarySourceSlit	Slit		Secondary-source-defining aperture (class TXM_SSA in startup/11-txm_motor.py); PV prefix not captured in this pass (OPTIC-2).		new confirm
Filter	Filter	foil_pattern: XF:18IDB-ES{IOLOGIK5:E1211}:DO{1..8}-Cmd	Eight pneumatic attenuating foils (filter1..filter8), each a digital-output relay on a Moxa ioLogik E1211 (not motors). Foil materials and thicknesses are not in the profile collection (FILT-1).
	confirm
XEng	PseudoAxis	XF:18IDA-OP{Mono:DCM-Ax:En}Mtr	The master energy computed axis (== Monochromator Energy axis, verified same record). Driving it triggers the coupled energy move move_zp_ccd_xh (startup/41-scans.py), which over a 5 to 15 keV range interpolates a calibration table (CALIBER / trans_calib_xh) to co-move the DCM (Chi2, Th2), zone plate (X, Y), condenser (X, Y1, Y2, P), aperture (X, Y), and detector (X, Y) so magnification stays constant. The lookup table is built by a staff calibration procedure (see procedures.md); CORA would own this move as the energy_change Conductor leg.
	confirm
WhiteFluxMonitor	GenericProbe	XF:18IDA-BI{WPFS:1}	White-beam flux/position sensor (Manta camera, read-only diagnostic).		confirm
PinkFluxMonitor	GenericProbe	XF:18IDA-BI{PMFS:1}	Pink-beam flux/position sensor (Manta camera, read-only diagnostic).		confirm
MonoFluxMonitor	GenericProbe	XF:18IDA-BI{MFS:1}	Monochromatic-beam flux/position sensor (Manta camera, read-only diagnostic).		confirm