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PreliminaryDesignReportOutline.odt

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MRO FTT/NAS & FLC

FTT/NAS Interim Preliminary Design Report MRO-TRE-CAM-1100-0142

The Cambridge FTT Team

rev 0.1 28 February 2012

Cavendish Laboratory JJ Thomson Avenue Cambridge CB3 0HE UK


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Change Record
Revision 0.1 Date 2012-02-28 Author(s) JSY Outline Changes

Objective
XXX

Scope
XXX

Reference Documents
RD1 Technical Requirements: Fast Tip-Tilt/Narrow-field Acquisition System (INT-403-ENG-0003) ­ rev 2.2, May 20th 2010

Applicable Documents
AD1 Design of an MROI System (INT-409-ENG-0020)

Acronyms and Abbreviations
FTT FLC ICD ISS NAS NMT Fast Tip-Tilt First Light Camera Interface Control Document Interferometer Supervisory System Narrow-field Acquisition System New Mexico Tech TBC TBD To be confirmed To be determined

MROI Magdalena Ridge Observatory Interferometer


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Table of Contents
1 Introduction.................................................................................................................................................. 2 System Overview.......................................................................................................................................... 3 Opto-mechanical tests................................................................................................................................... 3.1 Thermal test facilities............................................................................................................................ 3.1.1 Component tests........................................................................................................................... 3.1.2 Integrated test............................................................................................................................... 3.2 Dichroic/fold mirror mount tilt stability test......................................................................................... 3.2.1 Mount design................................................................................................................................ 3.2.2 Test............................................................................................................................................... 3.2.3 Discussion.................................................................................................................................... 3.3 Lens mount stability test....................................................................................................................... 3.3.1 Mount design................................................................................................................................ 3.3.2 Test............................................................................................................................................... 3.3.3 Discussion.................................................................................................................................... 3.4 Fold mirror mount piston stability test.................................................................................................. 3.4.1 Mount design................................................................................................................................ 3.4.2 Test............................................................................................................................................... 3.4.3 Discussion.................................................................................................................................... 3.5 Camera mount...................................................................................................................................... 3.5.1 Mount design................................................................................................................................ 3.5.2 Test............................................................................................................................................... 3.5.3 Discussion.................................................................................................................................... 3.6 Common baseplate (integrated) test...................................................................................................... 3.6.1 Test............................................................................................................................................... 3.6.2 Discussion.................................................................................................................................... 4 EMCCD Camera Performance..................................................................................................................... 5 Camera Enclosure......................................................................................................................................... 5.1 Enclosure design................................................................................................................................... 5.2 Test results............................................................................................................................................ 6 Electronics and services................................................................................................................................ 7 Conclusions.................................................................................................................................................. 7.1 Optical mount stability......................................................................................................................... 7.2 Closed-loop bandwidth......................................................................................................................... 7.3 Software................................................................................................................................................ 7.4 Schedule & prospects........................................................................................................................... 4 4 4 4 4 4 4 4 4 4 5 5 5 5 5 5 5 5 5 5 5 5 5 6 6 6 6 6 6 6 6 6 6 6 6


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1 Introduction
Outline the components of work that have been carried out in the PDR phase. Describe what is covered in this report and refer to other review documents. Refer to top level requirements document and indicate what, if anything, has changed since CoDR.

2 System Overview
Overview of current design of system together with a high-level description and diagram. Paraphrase description of overall concept from CoDR report: acquisition/fast guiding camera in thermal enclosure etc. Overview of general opto-mechanical design approach adopted, e.g. common base-plate, symmetry, non adjustable mounts etc. Refer to derived requirements document and indicate what, if anything of importance, has changed since CoDR. Explain the meaning of the stability tolerances, i.e. that they are displacements w.r.t. the symmetric expansion of the entire layout. Outline the major risks and what the tests are addressing.

3 Opto-mechanical tests
3.1 Thermal test facilities
3.1.1 Component tests
Description of test layout and the thermal enclosure including diagram(s) and photograph. Overview of the types of test that will be conducted with the facility. List of tests to be conducted.

3.1.2 Integrated test
Description of test layout and the thermal enclosure including diagram(s) and photograph. Overview of the types of test that will be conducted with the facility. List of (sub-)tests to be conducted.

3.2 Dichroic/fold mirror mount tilt stability test
3.2.1 Mount design
Brief descriptions of mount as used for dichroic or mirror, with a 3d drawing.

3.2.2 Test
Refer to type of test, the procedure used and present the results with any necessary additional information.

3.2.3 Discussion
Comparison of result with requirements/error budget and what our expectations are, if appropriate.


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3.3 Lens mount stability test
3.3.1 Mount design
Brief description of mount, with a 3d drawing.

3.3.2 Test
Refer to type of test, the procedure used and present the results with any necessary additional information.

3.3.3 Discussion
Comparison of result with requirements/error budget and what our expectations are, if appropriate.

3.4 Fold mirror mount piston stability test
3.4.1 Mount design
Refer to dichroic mount section. Emphasise issues to do with piston stability.

3.4.2 Test
Refer to type of test, the procedure used and present the results with any necessary additional information.

3.4.3 Discussion
Comparison of result with requirements/error budget and what our expectations are, if appropriate.

3.5 Camera mount
3.5.1 Mount design
Brief description of mount, with a 3d drawing. Emphasise separation of mount from enclosure structure and the thermal break issues. Emphasise that it is not mounted on same baseplate as other mounts and this places requirements on its thermal performance. Argument as to why no specific camera mount test is needed.

3.5.2 Test
This subsection N/A?

3.5.3 Discussion
This subsection N/A?

3.6 Common baseplate (integrated) test
Includes any test of the camera mount which is performed as part of the integrated test.

3.6.1 Baseplate design
Brief description of common baseplate and its kinematic mounting arrangement.


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3.6.2 Test
Refer to type of test, the procedure used and present the results with any necessary additional information.

3.6.3 Discussion
Comparison of results with requirements/error budget and what our expectations are, if appropriate.

4 EMCCD Camera Performance
Description of final custom clocking scheme. Test results from our validation of the custom clocking scheme.

5 Camera Enclosure
5.1 Enclosure design
Description of camera enclosure, its relationship to camera mount and emphasise what is different from CoDR design.

5.2 Test results
Brief presentation of any test/simulation results supporting the camera enclosure design.

6 Electronics and services
Overview of electronics rack; differences from CoDR. Outline of proposed cooling scheme and environmental monitoring and refer to detailed description of algorithms in software report. Status of interfaces

7 Conclusions
7.1 Optical mount stability
Overview of test results and our expectations to meet requirements

7.2 Closed-loop bandwidth
High level statements about camera and expected system performance.

7.3 Software
Summarize conclusions from separate software report.

7.4 Schedule & prospects
Work flow to end of current funding and beyond. Statements about costs for major items of the system.


MRO-TRE-CAM-1100-0142 Statement about risks mitigated or remaining.

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