Content Comparison

FIU

ADC prism rotators

Micronix PR-50-C0017

2x

$5500 ea / 10-12 weeks

Requires:

• removing FIU from AO Bench,

• opening FIU,

• removing rotator(s) from FIU,

• removing prism cell from rotator.

None

FIU

H&K fiber stage

Micronix PPX-32CR-C0002

1x

$4500 ea / 10-12 weeks

Requires:

• removing FIU from AO Bench,

• opening FIU,

• removing Ca HK fibers from stage,

• removing stage from FIU.

None

FIU

Calibration Fold Mirror Stage

Micronix PPS-20-C0035

1x

$4400 ea / 10-12 weeks

Requires:

• removing FIU from AO Bench,

• opening FIU,

• removing stage from FIU

• ensuring mirror is located properly after new stage is installed.

None

Cal Unit

Octagon Stepper Motor

Thorlabs NR360S

1x

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.

None

Cal Unit

ThAr Lamp

Green Scientific G858A

2x

The lamps are easily accessible on the exterior of the Calibration Unit.

1x Daily, 1x 'Gold'

1 spare

Cal Unit

UNe Lamp

Photron P863

2x

The lamps are easily accessible on the exterior of the Calibration Unit.

1x Daily, 1x 'Gold'

4 spares

Cal Unit

HCL Power Supply

Photron P209 Hollow Cathode Lamp Power Supply

4x

The HCL power supplies are easily accessible within the Calibration Rack.

1x Green Scientific Power Supply

Cal Unit

BroadBand Source 

Thorlabs SLS201L

2x

The broadband sources are easily accessible under the Calibration Bench.

1x Octagon, 1x Flat Field

None

Cal Unit

Intensity Monitor Stage

Newmark MSL-50-21

1x

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.

None

Cal Unit

Filter Wheel

Thorlabs FW102C

2x

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

None

Cal Unit

Compensator Motor

Newport TRA12PPD

4x

Need TBD

2x BS, 2x Fold

Cal Unit

Shutters

Uniblitz DSS25B

6x

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

3 spares (June 2023)

Cal Unit 

Etalon Super Continuum

NKT SuperK EVO

1x

$33.5k for new device, $8.5k to refurbish existing device. Lead 4-6 weeks.

The SuperK is easily accessible within Etalon Rack.

None

LFC

PCF Fiber

Fiber System

Scrambler Timed Shutter

Uniblitz NS65B

1x

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.

1 spare

Fiber System

Scrambler Source Select Shutter

Uniblitz RS20B

2x

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.

10 spares

Fiber System

Agitator Motor

Galil BLM-N23-50-1000-B

1x

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).

None

Vac Cart

Turbo Pump

Leybold TurboVac 450iX

1x

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.

None

Vac Cart

Roots Pump

Leybold EcoDry 65 Plus

1x

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.

None

Vac Cart

Isolator Stepper Motors

Lin Engineering 4118M-06S-22RO

5x

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

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

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