1 / 3

LBT LGSF: program goals and Phase A plans

LBT LGSF: program goals and Phase A plans. consensus on program goals: exploit the scientific competitive edge of LUCIFER MOS and wide field imaging need reliable, low maintenance system with low risks, minimize changes to existing telescope systems

zuzela
Download Presentation

LBT LGSF: program goals and Phase A plans

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. LBT LGSF: program goals and Phase A plans • consensus on program goals: • exploit the scientific competitive edge of LUCIFER MOS and wide field imaging • need reliable, low maintenance system with low risks, minimize changes to existing telescope systems • promptly realize ground-layer system (GLAO): ~4’ FOV, factor ≥2 improvement in FWHM and • ≥3 in concentration, operability significantly above median seeing • identify upgrade path to on-axis diffraction limited performance (=SCAO) • identify upgrade path to wide-field, modest Strehl, diffraction limited operation (=MCAO) • consensus on technology: • while Na LGSF has proven to deliver diffraction limited operation for SCAO, the currently lowest risk/affordable choice for GLAO in terms of laser technology is a pulsed Rayleigh system • projection system should be independent of laser technology, be a single projector for each of the pupils, allowing both on-axis and off-axis projection schemes • wave front sensors (wfs) should not require immediate re-design of AGW units: this may require that the wfs are outside the AGW units, upgrade to MCAO may require redesign of AGW/tertiary • unknowns: • which is the best upgrade path to diffraction limited mode ? • benefit of LGSF to interferometry (given fringe tracking issues) • how fast will a low cost, low maintenance Na-laser be available commercially ? • impact of LGSF on operations & commissioning • tradeoff between PSF stability across field and FWHM, predictability of PSF

  2. deliveries of Phase A • performance estimates as a function of seeing, Cn2(h), constellation of laser stars etc. • study availability and cost of Na-laser system • decision on laser system • opto-mechanical design • (universal) launch concept • upgrade paths to SCAO and MCAO and performance estimates, including tomography • impact on telescope, staffing plan • cost and schedule estimates phase A schedule: June 2007 – December 2007 conceptual design review: January/February 2008 (review panel to include external members)

  3. team responsibilities during phase A

More Related