This is the interface document for the Keck II telescope and AO Facility to NIRC-2 interfaces. This document covers the opto-mechanical details associated with both mounting the NIRC-2 system in the AO enclosure on the Nasmyth platform, and interacting with the AO system for normal operation. In addition, this will cover electrical power, communication needs (e.g., ethernet, fiber cables, etc.), cooling, size and space for electronics, and those maintenance items that impact the design of the AO enclosure. This document was converted into table form from the original paragraph form on the Keck AO web page.

Secondary Rack
(lakeshore,motor p/s, etc..

NIRC2 Interface Items	Location	Drawing / Spec	Action red: action needed green: complete	Rough Estimate of Manpower Requirement	Status
1.0 Optics Keck AO notes, KAON link	-	_	_	-	-
1.1 Focal ratio and pupil location	AO Bench	KAON 107	Measure with IR laser S. Acton	2 day 2 persons	TBD
1.2 Pupil motion with chopping and steering	300mm from AO bench	_	Determine Pupil Stability S. Acton Study pupil stability problem, Implement solution. S. Acton Test AO system without secondary baffle	21 days 3 persons 1 day 4 persons	TBD
1.3 Depth of beam	AO Bench	_	_	-	_
1.4 Optical axis height	305mm above AO	_	Measure with IR laser S. Acton	see para. 1.1	TBD
1.5 Change in focal plane position due to ADC	LNAS	_	_	-	_
1.6 Ghost images and emissivity from dichroic	AO Bench	-	_	_	_
1.7 Alignment system between AObench and NIRC-2 detector plane	N-2 targ/ AO CCD	KAON 46	Need for Active Alignment will be determined during NIRC2 commissioning S. Acton R. Campbell	5 days 2 persons	_
1.8 NIRC-2 spectral calibration sources	AO Bench	_	Determine position and routing of HV P/S and lines to lamps R. Campbell	2 days 1 person	_
2.0 Mechanical	_	_	_	_	_
2.1 Physical envelope allowed for NIRC2	AO	ACAD Drawing	_	_	_
2.2 NIRC-2 mounting to Nasmyth platform	LNAS	ACAD Drawing	Survey pads relative to AO bench Preliminary elevation measurements of pads J. Seerveld D. Medeiros T. Saloga	2 days, 2 persons	Scheduled for nov 2000 after Kcam removal 5 Sep 2000
2.3 Installation and alignment ofNIRC-2	LNAS AO enclosure	Installation Procedure	K. Mathews R. Campbell D. Mederios	21 days 5 persons	Upon Delivery 2001
2.4 Weight limit	_	< 1000kg	_	_	_
2.5 Overhead hoist	_	CK 1 ton 2Sp 3ph 130" range	CARA review design Install and test prior to dewar delivery D. Medeiros D. McBride	14 days 3 persons	review complete April 2000
2.6 Hoist Support	_	AO enclosure drawing	_	_	_
3.0 Electronics	_	Simple Single Line Drawing of NIRC2 Interface	_	_	_
3.1 Electronics racks for NIRC-2	In AO enclosure near NIRC-2	Drawing of E-box options PDF version	Determine characteristics of noise / preamp / cable length J. Larkin R. Matsuda	21 days 1-2 persons	In Process
Secondary Rack (lakeshore,motor p/s, etc..	Electronics Vault	-	Design and Build Interface Panel R. Campbell R. Matsuda	5 days 3 persons	TBD
3.2 Electrical power-	_	1.5kW	No UPS D. Mcbride	-	_
3.3 Glycol cooling /Heat Exchanger	Glycol to UCLA rack in AO clean room	655-C0005 -C0006	Install Glycol Module D. Medeiros Modify NIRC2 exchanger and Spare. Evaluate capacity B. Mason	10 days 1 person 3 days 1 person	In Process
3.4 NIRC-2 communication requirements (protocols)	_	EtherNet SCSI See SW specs	Run Cables in Tel Wrap	_	complete
3.5 NIRC-2 interface to Observatory (physical)	Interface panel in AO Elec. Vault	Fiber & Coax	Run Cables in Tel Wrap	_	complete
3.6 Grounding and shielding	_	KAON 94	Review design . Troubleshoot noise problem. R. Matsuda J. Larkin	5 days 2 persons	June 2000 In Process
Hoist control paddle and 3 phase power	_	_	CARA to provide 3ph Power (208 VAC) to AO roof and connector to handpaddle D. Mcbride	5 days 2 persons	TBD
4.0 Cooling and Environmental Control	_	_	_	_	_
4.1 Closed cycle refrigeration	mechanical room	_	Need connectors for speed controller D. Mcbride	0.5 days 1 person	TBD
CCR He Supply/Return	_	_	Install lines in Tel Wrap D. Mcbride Install Ts in AO enclosure D. Mederios	2 days 1 person	TBD
CCR Head Power	_	_	Need to pull one more cable thru wrap D. Mcbride	2 days 2 persons	one cable complete
CCR gauges	_	_	Evaluate need for gauges D. Mcbride K. Mathews	0.5 days 2 persons	_
4.2 Liquid nitrogen	N/A	N/A	_	_	_
4.3 Clean room	_	HEPA Filter System	CARA to create clean environment for NIRC2 dewar service, either temporary or permanent for AO bench and NIRC2 S. Acton P. Wizinowich D. Mcbride	21 days 3 persons	TBD
4.4 Humidity control	_	_	_	_	_
4.5 Vacuum System	Next to dewar	T-connect KF-40	Need for UPS/generator power for pump D. Mcbride Cold Startup Test K. Mathews	5 days 2 persons 2 days 1 person	TBD
5.0 Software Interfaces	_	Software Design Specification Doc	A. Conrad A. Honey B. Goodrich	-	_
5.1 User Interface	_	scripts/GUI	Integrate instrument and AO operation for astronomer. R. Campbell B. Goodrich	21 days 2 persons	In Process (NIRSPEC)

NIRC-2 Interface Document and Pre-Commission Tasks