Thermal Sensor Locations (Spectrometer and Hallway)

Introduction

Owing to the thermal sensitivity of KPF, we have placed 36 high-precision LakeShore temperature sensors throughout the spectrometer to monitor temperature changes throughout the instrument. Diagrams and tables below indicated the placement of these sensors, as well as their connections to the associated LakeShore 224-12 controllers.

Also included below is the list of our lower-precision LinkHub-E sensors, which are used to monitor less-critical temperatures such as within the electronics racks and around the Calibration Bench.

LakeShore Sensor Locations

Sensor locations and KTL keywords are shown below.

Lakeshore Channel Mapping

The reader is directed to High Precision Temperature Sensors for details on the Lakeshore 224-12 controllers and cable harnesses details.

The connectors on the various Lakeshore cable harnesses are labelled 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12.

This diagram indicates how they connect to the Lakeshore rear panel:

Spectrometer Lakeshore

Connector Number	Lakeshore Channel	KTL Keyword
1	Spectrometer Lakeshore D2	Primary_Collimator_Top
2	Spectrometer Lakeshore D3	Bench_Top_Dcut
3	Spectrometer Lakeshore D4	Bench_Top_Between_Cameras
4	Spectrometer Lakeshore D5	Bench_Top_Coll
5	Spectrometer Lakeshore C2	Bench_Bottom_Between_Cameras
6	Spectrometer Lakeshore C3	Bench_Bottom_Collimator
7	Spectrometer Lakeshore C4	Bench_Bottom_Dcut
8	Spectrometer Lakeshore C5	Bench_Top_Echelle_Cam
9	Spectrometer Lakeshore A	Reformatter
10	Spectrometer Lakeshore B	Bench_Bottom_Echelle
11	Spectrometer Lakeshore C1	Echelle_Top
12	Spectrometer Lakeshore D1	Echelle_Bottom

Green Lakeshore

Connector Number	Lakeshore Channel	KTL Keyword
1	Green Lakeshore D2	CRYOSTAT_G1 Within cryostat; likely on detector mounting plate to one side of CCD (opposite side to CRYOSTAT_G3)
2	Green Lakeshore D3 (not functioning)	CRYOSTAT_G2 Within cryostat; likely at the detector end of the cold strap
3	Green Lakeshore D4	CRYOSTAT_G3 Within cryostat; likely on detector mounting plate to one side of CCD (opposite side to CRYOSTAT_G1)
4	Green Lakeshore D5	Green_Camera_Echelle
5	Green Lakeshore C2	Green_Camera_Top
6	Green Lakeshore C3	Green_Camera_Bottom
7	Green Lakeshore C4	Green_Camera_Collimator
8	Green Lakeshore C5	Green_Grism_Top
9	Green Lakeshore A (not functioning)	SciSky_Scmblr_Chmbr_End
10	Green Lakeshore B	SciSky_Scmblr_Fiber_End
11	Green Lakeshore C1	CalEM_Scmblr_Chmbr_End
12	Green Lakeshore D1	CalEM_Scmblr_Fiber_End

Red Lakeshore

Connector Number	Lakeshore Channel	KTL Keyword
1	Red Lakeshore D2	CRYOSTAT_R1 Within cryostat; likely on detector mounting plate to one side of CCD (opposite side to CRYOSTAT_R3)
2	Red Lakeshore D3 (not functioning)	CRYOSTAT_R2 Within cryostat; likely at the detector end of the cold strap
3	Red Lakeshore D4	CRYOSTAT_R3 Within cryostat; likely on detector mounting plate to one side of CCD (opposite side to CRYOSTAT_R1)
4	Red Lakeshore D5	Red_Camera_Bottom
5	Red Lakeshore C2	Red_Grism_Top
6	Red Lakeshore C3	Red_Camera_Collimator
7	Red Lakeshore C4	Red_Camera_Echelle
8	Red Lakeshore C5	Red_Camera_Top
9	Red Lakeshore A	Green_LN2_Flange
10	Red Lakeshore B	Chamber_Ext_Bottom
11	Red Lakeshore C1 (not functioning)	Chamber_Ext_Top
12	Red Lakeshore D1	Red_LN2_Flange

LinkHub-E Sensor Mapping

Current KTL Keyword TEMPx	Location
0	Science Cal Fiber Stage
1	Cal Bench Octagon Motor
2	Cal Bench BB source
3	Th-Ar Gold
4	Cal Rack Top
5	U-Ne Daily
6	Cal Bench Enclosure Air
7	Cal Bench Bench
8	Sky Cal Fiber Stage
9	U-Ne Gold
10	Cal Bench Translation Stage Motor
11	Sim. Cal Fiber Stage
12	Th-Ar Daily
13	Cal Bench Bottom
14	Flat Field BB Source
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