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Byeong-Gon Park

Byeong-Gon Park. Contents. GMT Project – A Brief Introduction Current Status Plan 2013. A Brief Introduction. GMT Overview. Project period : 2003 ~ 2019(E) ~ 2022(F) Construction cost : $791M (2010) Partners : 10 ( USA, AUS, ROK) Funding : Partner Share Goals : 85%

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Byeong-Gon Park

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  1. Byeong-Gon Park

  2. Contents • GMT Project – A Brief Introduction • Current Status • Plan 2013

  3. A Brief Introduction

  4. GMT Overview • Project period : 2003 ~ 2019(E) ~ 2022(F) • Construction cost : $791M (2010) • Partners : 10 ( USA, AUS, ROK) • Funding : • Partner Share Goals : 85% • Commitments & Received : 45% • Room for 15% yet waiting for 1-2 partners

  5. Harvard Carnegie SAO KASI U. Arizona U. Texas Austin Texas A&M ANU Campanas GMT Partner Institutions Chicago AAL

  6. GMT - Features Features Ground-based 25 m telescope operating at near UV, visible & IR wavelengths Gregorian optical system with segmented primary & secondary mirrors Alt-azimuth mount Active & adaptive optics operation Natural seeing and AO science instruments

  7. Optical Concept Seven 8.4m Primary Mirror Segments Primary mirror: f/0.7 386 m2 Secondary mirror segments – 1.05m Conjugated 1:1 with primary segments Final Gregorian focus: f/8.3

  8. SecondarMirrors – ASM & FSM ASM • Seven 1.1 m M2 segments • Individual six DOF positioning mechanisms • Two interchangeable f/8 M2 assemblies • Adaptive Secondary Mirror (ASM) • Fast-steering Secondary Mirror (FSM) • Exchanged using the Enclosure crane FSM

  9. Development Phases

  10. GMT Master Plan

  11. Current Status(at the end of 2012)

  12. Achievements • Science Case Updated • Science Requirement Document completed in Feb. 2013 • Completion of the first primary segment • Setting up of pipeline fabrication plan • Site Preparation at Cerro Campanas • Selection of 1st Generation Instruments

  13. GMT Science Book The objective of the GMT Project is to design, build and operate a next-generation 25 meter optical/infrared telescope to conduct forefront astronomical research. Science Goals Themes • From Stars to Planets • Exoplanets • Stellar Populations • Galaxy Assembly & Evolution • Cosmology and Fundamental Physics • First Light & Reionization • Transient Phenomena • Synergies with other Facilities 3-4 key science questions in each area 125 pages total www.gmto.org

  14. Document Tree and Flow-Down ✓ Science Case ✓ ✓ ✓

  15. Science Requirements Document

  16. Science Requirements Document

  17. Achievements • Science Case Updated • Science Requirement Document completed in Feb. 2013 • Completion of the first primary segment • Setting up of pipeline fabrication plan • Site Preparation at Cerro Campanas • Selection of 1st Generation Instruments

  18. GMT #1 • M1 development program: 2004 • Parameters: • 8.4 m diameter off-axis segment • 36 m radius of curvature • 15 mm aspheric departure • New polishing techniques • Metrology • New test tower at SOML • Principal test: full aperture interferometer • Verification tests: • Laser tracker Plus • Scanning Pentaprism Test • SCOTS test (small scale) GMT pipeline: Capacity ~ 4 mirrors Cadence: ~12-14 mon.

  19. 8.4m Offf-Axis Primary

  20. Primary Mirror Segment Production GMT2 lift-off at SOML June 2012 GMT in Full Primary Mirror Production Mode

  21. Achievements • Science Case Updated • Science Requirement Document completed in Feb. 2013 • Completion of the first primary segment • Setting up of pipeline fabrication plan • Site Preparation at Cerro Campanas • Selection of 1st Generation Instruments

  22. Cerro Campanas Site Manquis Ridge (2308 m) (DuPont 100” telescope) Manqui Pk. (2450 m) (Magellan 6.5m telescopes) Alcaino Pk. (2410 m) GMT Site Campanas Pk. (2551 m) Pan American Hwy (Route 5) La Serena 160 km Pump station

  23. Preparation for the Site • Site development timeline • Clearing: Mar-Aug 2012 • Geotechnical testing: 2012-2013 • Civil works: 2014-2015 • Facility construction: 2015-2017 • Enclosure installation: 2016-2017 First blast (3/23/12)

  24. Before & After

  25. When Completed

  26. Achievements • Science Case Updated • Science Requirement Document completed in Feb. 2013 • Completion of the first primary segment • Setting up of pipeline fabrication plan • Site Preparation at Cerro Campanas • Selection of 1st Generation Instruments

  27. Gregorian Instruments Rotator • Folded Ports • ~Three Science Instruments • GLAO Assembly • Guider Assembly • Tertiary Mirror Assembly • Direct Gregorian Focus • Four Science Instrument bays

  28. First Generation Instruments Plus MANIFEST !!

  29. Instruments Specifications

  30. Plan 2013

  31. GMT 2013 Plan • Staged Construction Plan Setup • Stage 1 (Early Science) : 4 Primaries, FSM, NS-instruments • Stage 2(Full Commission) : 7 Primaries, ASM, AO-instruments • Preliminary Design Review Meetings • Sub-system PDR : ~ August • GMT System PDR : Sep. ~ Oct. • Cost estimation (capital & operation) : March • Cost for stage 1 construction • Total construction • Adjustment of project schedule according to cost estimation • Fix contribution plans of partners by the end of 2013 • Currently 100% committed partners: Korea (10%), Carnegie (10%), Australia(10%), Chicago (5%)

  32. GMT 2013 Plan • Meetings • GMTO Board Retreat : Aug. 23rd. (Tucson) • GMT #3 Casting Event : Aug. 24th. (Tucson) • GMTIFS Science Conference : Mar. 12th. – 13th. (Pasadena) • Cosmology Conference : Jun. 10th – 12th. (Chicago) • GMT Enclosure & Facilities PDR : Jan. 16th. – 18th. (Pasadena) • AO PDR : Feb. ? • Telescope PDR : Aug. ? • System PDR : Sep. ~ Oct. GOAL : Construction Start on Jan. 1st, 2014

  33. Thank you !!!

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