Next Generation Adaptive Optics System
Laser Launch Facility
Preliminary Design
(Draft)
May 27, 2009
VersionV1.0
Prepared By Author
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NGAO Laser Launch System Preliminary Design
(Draft)
REVISION HISTORY
Revision
1.0
Date
May 27, 2009
Author (s)
Reason for revision / remarks
Initial release
2 of 20
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NGAO Laser Launch System Preliminary Design
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TABLE OF CONTENTS
REVISION HISTORY ................................................................................................................................. 2
TABLE OF CONTENTS ............................................................................................................................. 3
1
INTRODUCTION............................................................................................................................... 5
2
REFERENCES .................................................................................................................................... 7
2.1
2.2
REFERENCED DOCUMENTS ........................................................................................................... 7
ACRONYMS AND ABBREVIATIONS................................................................................................ 7
3
OVERVIEW ........................................................................................................................................ 8
4
REQUIREMENTS .............................................................................................................................. 8
5
SYSTEM LAYOUT ............................................................................................................................ 8
6
DESIGN SELECTION METHODOLOGY ..................................................................................... 9
7
DESIGN ............................................................................................................................................... 9
7.1
7.1.1
7.1.2
7.1.3
7.2
7.2.1
7.2.2
7.2.3
7.2.4
7.3
7.3.1
7.3.2
7.3.3
7.3.4
7.4
7.4.1
7.4.2
7.4.3
7.4.4
7.5
7.5.1
7.5.2
7.5.3
7.5.4
7.6
7.6.1
7.6.2
7.6.3
7.6.4
7.7
7.7.1
7.7.2
7.8
7.8.1
OVERALL SYSTEM ........................................................................................................................ 9
Functional Layout................................................................................................................... 9
System Physical Layout .........................................................................................................11
Interfaces ...............................................................................................................................12
SWITCHYARD ..............................................................................................................................12
Optical Design .......................................................................................................................12
Mechanical Design ................................................................................................................13
Electrical Design ...................................................................................................................13
Procurements .........................................................................................................................13
BEAM TRANSFER OPTICS ............................................................................................................13
Optical Design .......................................................................................................................13
Mechanical Design ................................................................................................................13
Electrical Design ...................................................................................................................13
Procurements .........................................................................................................................13
ASTERISM GENERATOR ...............................................................................................................14
Optical Design .......................................................................................................................14
Mechanical Design ................................................................................................................14
Electrical Design ...................................................................................................................14
Procurements .........................................................................................................................14
BEAM STEERING .........................................................................................................................14
Optical Design .......................................................................................................................14
Mechanical Design ................................................................................................................14
Electrical Design ...................................................................................................................14
Procurements .........................................................................................................................15
LAUNCH TELESCOPE ...................................................................................................................15
Optical Description ...............................................................................................................15
Mechanical Description.........................................................................................................15
Electrical Design ...................................................................................................................15
Procurements .........................................................................................................................15
DIAGNOSTICS ..............................................................................................................................15
Design ....................................................................................................................................15
Procurements .........................................................................................................................15
SAFETY .......................................................................................................................................15
Design ....................................................................................................................................15
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7.8.2
Administrative and Procedural Controls ...............................................................................16
7.8.3
Procurements .........................................................................................................................16
7.9
CONTROLS SYSTEM .....................................................................................................................16
7.10
SOFTWARE ..................................................................................................................................17
7.10.1
Functions provide by software, algorithms, controls ........................................................17
8
SYSTEM PERFORMANCE .............................................................................................................17
8.1
OPTICAL ......................................................................................................................................17
8.1.1
Transmission ..........................................................................................................................17
8.1.2
Wavefront Error ....................................................................................................................17
8.1.3
Pointing Errors ......................................................................................................................17
8.2
MECHANICAL ..............................................................................................................................17
8.2.1
Mass on Telescope and Impacts ............................................................................................17
8.2.2
Heat Dissipation and Glycol requirements............................................................................17
8.3
ELECTRICAL ................................................................................................................................17
9
OPERATIONS ...................................................................................................................................17
9.1
9.2
9.2.1
9.2.2
9.3
9.4
MODES ........................................................................................................................................17
PROCEDURES...............................................................................................................................17
Alignment ...............................................................................................................................17
Cleaning ................................................................................................................................17
CONFIGURATION MANAGEMENT .................................................................................................17
OPERATIONAL RESOURCES .........................................................................................................17
10
DEVELOPMENT AND TESTING ..................................................................................................18
11
REQUIREMENTS COMPLIANCE VERIFICATION .................................................................18
12
RISK AND RISK REDUCTION PLAN ..........................................................................................18
13
DELIVERABLES ..............................................................................................................................18
14
MANAGEMENT ...............................................................................................................................19
14.1
14.2
14.3
15
BUDGET ......................................................................................................................................19
BUDGET REDUCTION POSSIBILITIES ............................................................................................20
SCHEDULE ...................................................................................................................................20
PLANS FOR THE NEXT PHASE ...................................................................................................20
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INTRODUCTION
As part of the Next Generation Adaptive Optics System (NGAO), a Laser Launch Facility System is
needed to …
This document provides the design for the Laser Launch System in support of the NGAO Preliminary
Design Phase.
Things to keep in mind during this phase.
Taken from Meeting 7 PD phase:
•
•
Objectives.
–
Deliver documented designs for each system, sub-system & component, hardware or
software, of sufficient detail to establish through inspection & analysis the feasibility of
the proposed design, & the likelihood that the design will meet the requirements.
–
Present the project plan to completion, including a detailed schedule & budget.
Principal activities
–
•
Design, prototyping, simulation and analysis.
Key deliverables
–
Preliminary technical specifications, requirements for subsystems, a preliminary
Operations Concept Document, Interface Design document(s), & a Preliminary Design
report.
•
Observing Operations Concept Document
•
System Requirements Document
•
Functional Requirements & Interface Control Document(s)
•
–
AO system, laser system, science operations tools, science instruments
–
Managed within Contour database
Preliminary Design Manual (the document to read to understand the design & performance of the
NGAO facility – draft PDM posted)
–
Flowdown of requirements to design
–
Solidworks & Zemax model(s)
–
Software design (RTC, non-RTC & science ops tools)
–
Performance Budget Reports (wavefront, EE, astrometry, contrast, …)
–
Science Performance Analysis Report
•
Science Instrument Design Manual
•
Risk Assessment & Management Report
•
Systems Engineering Management Plan
–
Project plan to completion, including a detailed schedule & budget
–
Phased implementation option(s)
–
Cost estimation
–
Justification for any procurements during DD
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From the WBS Definition
Phase
PD
WBS Element
Deliverable
Develop a preliminary design for the systems required for 1. Preliminary optical design for optics located in laser enclosure (b
delivering the laser power from the laser to the sky. This transport, laser pointing, diagnostics) including ray trace de
includes: 1) Laser Beam Transport: Develop preliminary preliminary tolerances, and preliminary alignment plan 2. Prelimi
design for delivering the laser power from the laser to the optical design for launch telescope 3. Preliminary optical design for o
launch telescope. 2) Laser Pointing and Diagnostics: located along telescope tube and behind secondary (beam transport,
Develop preliminary design for determining and pointing, and diagnostics) 4. Mechanical design for mechanical elem
controlling the alignment and pointing of the laser beams. located in laser enclosure (beam transport, laser pointing, diagnos
Develop preliminary design for regularly monitoring the including mechanical drawings, mechanism for motion control, o
beam quality, laser power, and health of the laser launch mounts 5. Mechanical design for laser launch telescope and mechan
system. 3) Laser Launch Telescope: Develop the supports 6. Mechanical design for mechanical elements located a
preliminary design for the telescope needed to launch telescope tube and behind secondary 7. Electrical design for b
multiple laser beacons Does not include: Software control transport, laser pointing, diagnostics and launch telescope inclu
of these systems is part of laser system control (WBS 5.5) electrical system for motion control, monitoring 8. Interfaces (intern
Software control of safety shutters and interlocks is part of NGAO) 9. Assembly, alignment, and test plans 10. Verify complia
laser safety system (WBS 5.4)
update requirements matrices and updated requirements (prelimi
specifications) 11. Document design
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REFERENCES
2.1
Referenced Documents
Documents referenced are listed in Table 1. Copies of these documents may be obtained from the source
listed in the table.
Ref. #
Document #
Revision or
Effective Date
Source
Title
1
KAON 511
0.3
WMKO
NGAO System Design Manual
2
KAON 525
1.0
WMKO
K1 LGSAO Safety System Preliminary
Design Report
3
KAON 562
1.0
WMKO
NGAO Design Changes
4
KAON 574
1.0
WMKO
NGAO Systems Engineering Management
Plan
5
KAON 642
April 10, 2009
WMKO
NGAO Design Changes in Support of
Build-to-Cost Guidelines
6
KAON 572
0.1
WMKO
Instrument
Document
Table 1: Reference Document
2.2
Acronyms and Abbreviations
Table 2 defines the acronyms and abbreviations used in this document.
Acronym/Abbreviation
Definition
K1
Keck 1
K2
Keck 2
KAON
Keck Adaptive Optics Note
LGS
Laser Guide Star
LLF
Laser Launch Facility
NGAO
Next Generation Adaptive Optics System
NGS
Natural Guide Star
WMKO
W.M.K. Observatory
Table 2: Acronyms and Abbreviations
Baseline
Requirements
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OVERVIEW
A description of where this system fits into the overall NGAO System.
Figure 1: Laser Launch Facility within the NGAO System
4
REQUIREMENTS
Any changes to the requirements from the SDR phase. Key requirements drivers for the design.
5
SYSTEM LAYOUT
Provide an overall view of how the system is physically laid out. This may change with the design.
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Figure 2: System Layout on Telescope
6
DESIGN SELECTION METHODOLOGY
Design concepts that was considered and how they were down selected to the design to move forward with.
7
7.1
7.1.1
DESIGN
Overall System
Functional Layout
The LLF is consisted on opto-mechanical components and electronics to support the function of
propagating laser beams. The LLF will be the receiver of beams from the laser systems which are not part
of the LLF. The LLF will interact with the overall NGAO control system through the TBD.
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Switchyard
Beam Transport Optics
Laser 3
Beam Generation System
Laser 2
LLF Control System
(Laser Steering System)
Laser 1
Laser Service Enclosure 2
(LSE2)
Facility Infrastructure
Laser Control and Laser
Sequencer
Laser Service Enclosure 1
(LSE1)
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Aircraft Detection
Launch Faciltiy
Laser Traffic and Control
(LTCS)
Laser 3
Laser Clearinghouse
Systems
Laser 2
Safety System
Drive and Control System
Laser 1
Laser Service Enclosure 2
(LSE2)
Facility Infrastructure
Laser Control and Laser
Sequencer
Laser Service Enclosure 1
(LSE1)
Figure 3: Safety System Interfaces
7.1.2
System Physical Layout
Figure 4: Laser Launch Facility Layout
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7.1.3
7.1.3.1
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Interfaces
External Interfaces
Refer to existing or new documents.
F/15 Module
Telescope
Safety System
Laser 3
Laser 2
LLF Control System
Laser 1
Laser Service Enclosure 2
(LSE2)
Facility Infrastructure
NGAO Control
System
Laser Service Enclosure 1
(LSE1)
Figure 5: LLF External Interfaces
7.1.3.1.1 LLF Control System to NGAO Control System
This is a network interface to communicate with the overall NGAO Control System for control and status.
7.1.3.1.2 LLF Control System to NGAO Control System
Laser, Motion Control System, Telescope, f/15 module, laser enclosure.
7.1.3.2
Internal Interfaces
Refer to existing or new documents.
Include a figure.
Switch yard to BTO, BTO to AG, AG to BS, BS to LT.
7.2
7.2.1
Switchyard
Optical Design
Description
7.2.1.1
Layout
Include a Figure.
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7.2.1.2
7.2.2
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Zemax if necessary
Mechanical Design
7.2.2.1
Size, Volume, Weight
7.2.2.2
Heat Dissipation
7.2.2.3
Interface to Laser Enclosure and Laser
7.2.3
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Electrical Design
Describe what motion controls are necessary and to what level of accuracy and repeatability. Assume the
controls team to provide the needed motion control. Specify motion parameters including motor and they
will
7.2.4
Procurements
Spreadsheet of Parts and Cost. Req: 20% level. Goal: 10% Level.
7.3
7.3.1
Beam Transfer Optics
Optical Design
Description
7.3.1.1
Layout
Include a Figure.
7.3.1.2
7.3.2
Zemax if necessary
Mechanical Design
7.3.2.1
Size, Volume, Weight
7.3.2.2
Heat Dissipation
7.3.2.3
Interface to Switchyard, Telescope, Asterism Generator
7.3.3
Electrical Design
Describe what feedback devices will be necessary to correctly maintain the spot in the BTO.
Describe what motion controls are necessary and to what level of accuracy and repeatability. Assume the
controls team to provide the needed motion control. Specify motion parameters including motor and they
will deal with the rest.
7.3.4
Procurements
Spreadsheet of Parts and Cost. Req: 20% level. Goal: 10% Level.
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7.4
7.4.1
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Asterism Generator
Optical Design
Description
7.4.1.1
Layout
Include a Figure.
7.4.1.2
7.4.2
Zemax if necessary
Mechanical Design
7.4.2.1
Size, Volume, Weight
7.4.2.2
Heat Dissipation
7.4.2.3
Interface to BTO, f/15 module, telescope, Beam Steering
7.4.3
Electrical Design
Describe what motion controls are necessary and to what level of accuracy and repeatability. Assume the
controls team to provide the needed motion control. Specify motion parameters including motor and they
will deal
7.4.4
Procurements
Spreadsheet of Parts and Cost. Req: 20% level. Goal: 10% Level.
7.5
7.5.1
Beam Steering
Optical Design
Description
7.5.1.1
Layout
Include a Figure.
7.5.1.2
7.5.2
Zemax if necessary
Mechanical Design
7.5.2.1
Size, Volume, Weight
7.5.2.2
Heat Dissipation
7.5.2.3
Interface to Asterism Generator, f/15 module, telescope, Launch Telescope
7.5.3
Electrical Design
Describe what motion controls are necessary and to what level of accuracy and repeatability. Assume the
controls team to provide the needed motion control. Specify motion parameters including motor and they
will deal with the rest.
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7.5.4
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Procurements
Spreadsheet of Parts and Cost. Req: 20% level. Goal: 10% Level.
7.6
Launch Telescope
Worthwhile to mentioned that we have done this before on K1 and will be doing an ECR to install the LT
versus a full design review.
7.6.1
Optical Description
Description. Refer to Technical Description
7.6.1.1
Layout
Include a Figure.
7.6.1.2
7.6.2
Zemax if necessary
Mechanical Description
7.6.2.1
Size, Volume, Weight
7.6.2.2
Interface to f/15 module, Beam Steering
7.6.3
Electrical Design
Describe what diagnostics may be needed such as temperature control.
7.6.4
Procurements
Spreadsheet of Parts and Cost. Req: 20% level. Goal: 10% Level.
7.7
7.7.1
Diagnostics
Design
Types of diagnostics available
7.7.2
7.8
7.8.1
Procurements
Safety
Design
Overall safety functions needed and how it is done. Possibly an interlock spreadsheet.
7.8.1.1
Laser Status Indicators
Laser status indicators shall be provided at entry point to hazardous zones. The indicators will be
represented in the following tables. The indicators will be momentary to minimize light contamination in
the dome.
1
Laser Status Green
Acceptable to enter, no hazardous radiation
2
Laser Status Yellow
Acceptable
to
enter,
hazardous
radiation
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contained
3
Laser Status Red
Do not enter, hazardous radiation
Table 3: Laser Status Indicator Definition
7.8.1.2
Safety Equipment
Safety Equipment shall be provided such as infrared viewers, goggles and fire extinguishers for personnel.
Goggles will be rated based on the completion of the hazard analysis. Clean Guard fire extinguishers will
be used to minimize contamination of optics.
7.8.2
Administrative and Procedural Controls
Administrative and procedural controls shall be provided to ensure the system will be operated safety.
Procedural controls include alignment procedures that will be provided by the subsystems. Each subsystem
alignment process will be verified for safety by the Laser Safety Officer. The following is a list of
alignments that will be provided by their respective subsystems:

Laser Alignment

Optical Switchyard Alignment

Beam Transfer Optics Alignment

Launch Facility Alignment
Other procedural and administrative controls include keep out zones during alignment and confine areas for
trained personnel only, such as the laser service enclosures.
7.8.3
7.9
Procurements
Controls System
The LLT does not need to provide the control system; but a description would be helpful.
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7.10
Software
7.10.1
8
8.1
Functions provide by software, algorithms, controls
SYSTEM PERFORMANCE
Optical
8.1.1
Transmission
8.1.2
Wavefront Error
8.1.3
Pointing Errors
8.2
Mechanical
8.2.1
Mass on Telescope and Impacts
8.2.2
Heat Dissipation and Glycol requirements
8.3
Electrical
Power needed
9
9.1
OPERATIONS
Modes
How will this system operate? Modes?
9.2
Procedures
9.2.1
Alignment
9.2.2
Cleaning
9.3
Configuration Management
Any Configurations management issues (usually s/w)
9.4
Operational Resources
Expected Operational Resources to Maintain Operations
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DEVELOPMENT AND TESTING
The following provides a methodology on how the safety system will be developed and tested. More detail
plans shall be provided in the DDR
11
REQUIREMENTS COMPLIANCE VERIFICATION
The following table shows the LLF requirements compliance.
Requirement
Subsystem
Design Compliance and description
General Instrument Requirements
Overall
In Compliance
Table 4: Compliance Status
12
RISK AND RISK REDUCTION PLAN
Identify any procurements that is needed to purchase in the DDR phase.
Based on the risk guidelines of KAON xxx, the risks associated with the laser safety system as a whole is
low. The following table shows individual risks within LLF, their ranking and mitigation plans if
necessary.
Risk
Ranking
Mitigation
1
Communications with the LSI not functioning
Low
This risk is based on the fact the
distributed control system is not
determined at this time. The fall
back position is to use a Unix IOC
type interface similar to what is done
in K1 Laser; however, the interface
will be a private network instead of
going through an open network.
2
Growth of I/O points due to multiple laser systems
or enclosures
Low
The LLF is designed to be scaled;
however, the volume, weight, heat
load will increase with larger
electronics
to
accommodate
additional subsystem interface.
13
DELIVERABLES
Specify what the deliverables for this system are. Hardware, software, documentation, procedures.
The following procedures and data will be provided in DDR:

Technical Drawings

Interlock Test Procedure

Safety Audit Checklist

Hazard Analysis

Spares Recommendation
The following documentation will be provided prior to laser operations:
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
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Standard Operational Procedure
Safety System
Hardware
Software/
Firmwire
Documentation
PLC Assembly
PLC Ladder Logic
Technical Drawings
AO Node Assembly
Software Configuration
Management Plan
Standard Operating
Procedure
Interface Cabling
FAA Request for
Propagation
Engineering Controls
Laser Clearinghouse
Request for Propagation
Interlock Test
Procedure
Safety Audit Checklist
Spares
Recommendation
Hazard Analysis
Figure 6: Safety System Deliverables
14
14.1
MANAGEMENT
Budget
Based on the deliverables, what is the expected cost, include procurement, labor. Include a section on,
based on the risk, a % of contingency should be available.
The effort estimate for the LLF is x hours of labor and $x for procurements.
Item
Electrical Engineer
Electrical Technician
Software Engineer
Mechanical Technician
Laser Safety Officer
DDR
FSD
I&T
Handover
Total
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Total
Table 5: LLF Effort Estimates (Hours)
Subsystem
Switchyard
Beam Transfer Optics
Asterism Generator
Beam Steering
Diagnostics
Safety
Control
Software
Total
Table 6: Procurements
14.2
Cost
Budget Reduction Possibilities
The distributed design of the LLF can be reduced to controller assembly at the AO Electronics Vault. The
disadvantages are accessibility onto the telescope and added equipment in the vault. The cost savings will
be $15,000 for parts.
14.3
15
Schedule
PLANS FOR THE NEXT PHASE
The following effort is planned for the Detailed Design Phase:

Completed designs and fabrication drawings

Software keywords definition

Completed Interface Control Document

Implementation and test plans

Operational and Maintenance Plans

Handover Plans

Spares Recommendation

Retirement of risks

Budget and Schedule