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/lix/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	16-ID
Tier	Unit
Source	insertion-device (confirm: 16-ID is an in-vacuum-undulator (IVU) beamline; the profile collection fits an empirical Keff(gap) curve (a 23 mm period implied, 3 GeV ring) but does not state the device model or length. Source identity and parameters are SRC-1)

Enclosures¶

Enclosure	Role	Facility	Permit signal
`lix-optics`	optics-hutch	`nsls2`	confirm: PSS permit leaf not in the profile collection (the security model in the profile collection is a POSIX-ACL login, not a PSS integration); the optics and transport zones (XF:16IDA, XF:16IDB), the hutch grouping is ENC-1 (PSS-1)
`lix-endstation`	experiment-hutch	`nsls2`	confirm: PSS permit leaf unknown; the solution / scanning endstation (XF:16IDC), ENC-1 (PSS-1)

Machine¶

The machine-level source state, observed not driven.

Enclosure: lix-optics.

Note

Observe-only NSLS-II machine state, the loose StorageRing pattern reused from the NSLS-II siblings. 16-ID has an in-vacuum undulator, modelled as an InsertionDevice in the optics group below (SRC-1, MACHINE-1).

Name	Family	PV	Key specs	Replaceable	Status
`StorageRing`	`StorageRing`	confirm: `NSLS-II storage-ring state (current, fill, status); observe-only; the ring-current PV SR:OPS-BI{DCCT:1}I:Real-I is read for beam suspenders, the rest is MACHINE-1`	NSLS-II storage-ring state; observe-only (MACHINE-1)		`new` `confirm`

Optics¶

The in-vacuum undulator, the double-crystal monochromator and the incident-energy axis, the white-beam and KB focusing mirrors, the mono slit and secondary-source aperture, and the photon and fast shutters.

Enclosure: lix-optics.

Note

16-ID is an undulator beamline: the IVU binds InsertionDevice and the incident energy is a PseudoAxis over the DCM Bragg angle coupled to the undulator gap. The mirrors bind Mirror, the slits bind Slit, the shutters bind Shutter. Everything here reuses the catalog and coins nothing.

Name	Family	PV	Key specs	Status
`Undulator`	`InsertionDevice`	`SR:C16-ID:G1{IVU:1-Ax:Gap}-Mtr`	the in-vacuum undulator: a gap motor (plus brake-disengage interlock signals); the gap-to-energy lookup is an empirical Keff(gap) fit; the device model, period, and length are SRC-1	`new` `confirm`
`Monochromator`	`Monochromator`	`XF:16IDA-OP{Mono:DCM-Ax:Bragg}Mtr`	the double-crystal monochromator (DCM): Bragg angle sets the energy, with second-crystal pitch / roll / offset and a fine-pitch feedback axis; a silicon crystal (lattice constant a = 5.431 angstrom, the energy law's 2/sqrt(3) factor implying the Si(111) reflection), MONO-1	`new` `confirm`
`BeamEnergy`	`PseudoAxis`	confirm: `the incident-energy virtual axis over the DCM Bragg angle coupled to the undulator gap (lambda = 2 d sin(Bragg)); the partition rule and crystal cut are MONO-1`	incident-energy pseudo-axis over the DCM Bragg angle and the undulator gap (MONO-1)	`new` `confirm`
`WhiteBeamMirror`	`Mirror`	`XF:16IDA-OP{Mir:WBM-Ax:P}Mtr`	the white-beam mirror (x / y / pitch) taking the heat load and rejecting harmonics; coating is OPT-1	`new` `confirm`
`KbMirror`	`Mirror`	`XF:16IDA-OP{Mir:KBH-Ax:YU}Mtr`	the Kirkpatrick-Baez focusing pair (a horizontal mirror KBH and a vertical mirror KBV, each on tip / tilt / bend); one Asset for the pair at this cut; whether the mirrors are bimorph and their coatings are OPT-1	`new` `confirm`
`MonoSlit`	`Slit`	`XF:16IDA-OP{Slt:1-Ax:T}Mtr`	the mono four-blade defining slit (T / B / O / I); blade-axis map is OPT-2	`new` `confirm`
`SecondarySourceAperture`	`Slit`	`XF:16IDB-OP{Slt:SSA1-Ax:T}Mtr`	the secondary-source aperture in the transport zone (XF:16IDB), defining the focused source size (OPT-2)	`new` `confirm`
`PhotonShutter`	`Shutter`	`XF:16IDA-PPS{PSh}Enbl-Sts`	the personnel-protection photon shutter; only the enable-status leaf is in the profile collection, the front-end shutter and the search-and-secure leaves are PSS-1	`new` `confirm`
`FastShutter`	`Shutter`	`XF:16IDB-BI{shutter:1}sts`	the millisecond fast shutter on its own translation stage, gating the exposure; it is driven by a TTL pulse from the timing seam (the Zebra / XPS), the exposure-timing seam (TRIG-1)	`new` `confirm`

Focusing¶

The endstation-zone focusing and beam-defining optics: the compound refractive lens transfocator, the divergence-defining aperture, and the guard slit.

Enclosure: lix-endstation.

Note

These optics sit in the endstation zone (XF:16IDC) but condition the beam, so they are part of the source stage. The compound refractive lens binds the graduated Transfocator Family (a well-established graduated optic across the fleet); the divergence-defining aperture and the guard slit each bind Slit.

Name	Family	PV	Key specs	Status
`Transfocator`	`Transfocator`	`XF:16IDC-OP{CRL-Ax:Z}Mtr`	the compound refractive lens (CRL) transfocator: a z translation plus upstream / downstream x / y alignment, with nine selectable lens groups (per-group in / out and a busy flag) setting the focal length; reuses the graduated Transfocator Family (also bound by the NSLS-II siblings CHX / IXS / SMI / FMX and the APS / Diamond CRLs); the lens-group configuration is CRL-1	`new` `confirm`
`DivergenceAperture`	`Slit`	`XF:16IDC-OP{Slt:DDA-Ax:X}Mtr`	the divergence-defining aperture (center / gap) setting the beam divergence at the endstation (OPT-2)	`new` `confirm`
`GuardSlit`	`Slit`	`XF:16IDC-OP{Slt:G2-Ax:X}Mtr`	the endstation guard slit (center / gap) cleaning up parasitic scatter before the sample; the upstream Slt:G1 is disabled in the profile collection (OPT-2)	`new` `confirm`