Spares / Limited Life / Consumables List

Replacement Difficulty Key:

VERY DIFFICULT	Instrument will be off-line while this replacement happens.
MEDIUM DIFFICULTY	Some care required, or extended time required for replacement
EASY	Component easily accessible with minimal time required for replacement. Partial or no instrument down-time required for change.
OPTICAL REALIGNMENT	Note indicating an optical realignment or verification is required after the component is replaced.

Subsystem	Item Description	Manufacturer & Part Number	QTY in System	Cost / Lead Time*	Replacement Difficulty	Replacement Notes	General Notes
FIU	ADC prism rotators	Micronix PR-50-C0017	2x	$5500 ea / 10-12 weeks	VERY DIFFICULTOPTICAL REALIGNMENT	Requires: removing FIU from AO Bench, opening FIU, removing rotator(s) from FIU, removing prism cell from rotator.
FIU	H&K fiber stage	Micronix PPX-32CR-C0002	1x	$4500 ea / 10-12 weeks	VERY DIFFICULTOPTICAL REALIGNMENT	Requires: removing FIU from AO Bench, opening FIU, removing Ca HK fibers from stage, removing stage from FIU.
FIU	Calibration Fold Mirror Stage	Micronix PPS-20-C0035	1x	$4400 ea / 10-12 weeks	VERY DIFFICULT OPTICAL REALIGNMENT	Requires: removing FIU from AO Bench, opening FIU, removing stage from FIU ensuring mirror is located properly after new stage is installed.
Cal Unit	Octagon Stepper Motor	Thorlabs NR360S	1x		VERY DIFFICULT OPTICAL REALIGNMENT	The rotation stage is accessible on the outside of the Calibration Bench, and mechanically this is a straightforward change. The difficulty lies in re-aligning the fold mirror mounted on the rotation stage, so that is directs the light from all sources onto the various fibers.
Cal Unit	ThAr Lamp	Green Scientific G858A	2x		EASY	The lamps are easily accessible on the exterior of the Calibration Unit.	1x Daily, 1x 'Gold'
Cal Unit	UNe Lamp	Photron P863	2x		EASY	The lamps are easily accessible on the exterior of the Calibration Unit.	1x Daily, 1x 'Gold'
Cal Unit	HCL Power Supply	Photron P209 Hollow Cathode Lamp Power Supply	4x		EASY	The HCL power supplies are easily accessible within the Calibration Rack.
Cal Unit	BroadBand Source	Thorlabs SLS201L	2x		EASY	The broadband sources are easily accessible under the Calibration Bench.	1x Octagon, 1x Flat Field
Cal Unit	Intensity Monitor Stage	Newmark MSL-50-21	1x		MEDIUM DIFFICULTY	Mechanically the stage is easy to remove, and the intensity monitor detector is simply mounted (on a post with no careful alignment requirements). Marked as medium difficulty given the care required to avoid damaging the bare optical fibers within the Calibration Unit enclosure.
Cal Unit	Filter Wheel	Thorlabs FW102C	2x		MEDIUM DIFFICULTY	Mechanically the filter wheels are easy to remove with no careful alignment requirements. Marked as medium difficulty given the care required to avoid damaging the bare optical fibers within the Calibration Unit enclosure.	2x Cal Bench, 1x Flat Field
Cal Unit	Compensator Motor	Newport TRA12PPD	4x		Need TBD		2x BS, 2x Fold
Cal Unit	Shutters	Uniblitz DSS25B	6x		MEDIUM DIFFICULTY	The various shutters are designed to be easily removable from their mounts. Marked as medium difficulty given time required to open the enclosure to access shutter, and care required while working around exposed optics and fibers.	2x Cal Bench, 1x Flat Field, 2x SoCal, 1x HK
Cal Unit	Etalon Super Continuum	NKT SuperK EVO	1x		EASY	The SuperK is easily accessible within Etalon Rack.
LFC	PCF Fiber
Fiber System	Scrambler Timed Shutter	Uniblitz NS65B	1x		MEDIUM DIFFICULTY	This shutter is designed to be easily removable from the scrambler. Marked as medium difficulty given time required to open the enclosure to access the shutter, and care required while working around exposed optics and fibers.
Fiber System	Scrambler Source Select Shutter	Uniblitz RS20B	2x		MEDIUM DIFFICULTY	These shutters are designed to be easily removable from the scrambler. Marked as medium difficulty given time required to open the enclosure to access the shutters, and care required while working around exposed optics and fibers.
Fiber System	Agitator Motor	Galil BLM-N23-50-1000-B	1x		MEDIUM DIFFICULTY	Motor is accessible on the outside of the agitator. A flex coupling is used between the motor and the agitator mechanism, so no careful alignment required. Marked as medium difficulty given the agitator is located within the crypt (not easily accessible and potential permits required).
Vac Cart	Turbo Pump	Leybold TurboVac 450iX	1x		VERY DIFFICULT	Vacuum chamber gate valve must be closed, and Vac Cart enclosure opened to replace pump. Vacuum pressure within chamber will be rising during this time (affecting instrumental stability), making this replacement time-sensitive. A WMKO turbo cart could be connected to the chamber during the replacement to help minimize the vacuum pressure change.
Vac Cart	Roots Pump	Leybold EcoDry 65 Plus	1x		VERY DIFFICULT	Vacuum chamber gate valve must be closed, and Vac Cart enclosure opened to replace pump. Vacuum pressure within chamber will be rising during this time (affecting instrumental stability), making this replacement time-sensitive. A WMKO turbo cart could be connected to the chamber during the replacement to help minimize the vacuum pressure change.
Vac Cart	Isolator Stepper Motors	Lin Engineering 4118M-06S-22RO	5x		VERY DIFFICULT	Requires warming up CCDs, venting main spectrometer vacuum chamber, and opening chamber door(s) to gain access to the motors under the optical bench. Depending on the motor’s location, the Vac Cart, Aux Rack and LN2 Autofill system might need to be disconnected and moved out of the way so the chamber door can open.
Aux Rack	Cryostat Ion Pumps	Gamma 3SDI1V5KNN (3S TiTan)	4x		VERY DIFFICULT	Requires warming up CCDs, venting main spectrometer vacuum chamber, and removing the large camera-access flange on the side of the vacuum chamber.	500 hours at 1e-4mbar 5,000 hours at 1e-5mbar 50,000 hours at 1e-6mbar 500,000 hours at 1e-7mbar
Aux Rack	LN2 Pumps	Instec LN2-SYS	2x		MEDIUM DIFFICULTY	The pumps are easily accessible on the LN2 cart in the basement. Marked as medium difficulty given the steps involved: power down the appropriate Instec controller; connect the new pump and power it on; turn the Instec controller back on; ensure Instec set point is correct and temperature control enabled. There is also some risk involved, as care must be taken to avoid water vapor getting into the lines (leading to ice blocking the lines). If ice blocks the lines then the CCD must be warmed up and the lines purged (with a major disruption to the instrument stability timeline).
LN2 Cart	Autofill Solenoids		2x
Temperature Sensors	Extra 1-wire Sensors