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Consortium Meeting, June 99, BU Recent Progress

Consortium Meeting, June 99, BU Recent Progress. a Summary of Progress during the last six months Matthew Whyndham. Recent Progress. Dec 98 US Partner Selection Jan 99 Consortium Meeting (NRL) Mar 99 Solar-B mission kick-off meeting (ISAS) choice of EIS configuration

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Consortium Meeting, June 99, BU Recent Progress

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  1. Consortium Meeting, June 99, BU Recent Progress a Summary of Progress during the last six months Matthew Whyndham

  2. Recent Progress • Dec 98 US Partner Selection • Jan 99 Consortium Meeting (NRL) • Mar 99 Solar-B mission kick-off meeting (ISAS) • choice of EIS configuration • choice of wavelength ranges • Apr, May 99 optical design evolution • May 99 Engineering Meeting (NRL) Consortium Meeting 9906 - Summary of Progress - MWT

  3. US Partner Selection • All three Solar-B scientific payloads have US contributions • All instruments have Japanese PI’s • SOT - S. Tsuneta • FPIP : Alan Title - LMATC • XRT - K. Shibasaki • Leon Golub - SAO • EIS - T. Watanabe • Len Culhane - MSSL/UCL, BU, RAL + science team • George Doschek - NRL, GSFC Consortium Meeting 9906 - Summary of Progress - MWT

  4. Mission Kick-Off Meeting • Introduction of Solar-B main players :ISAS, NAO, MELCO, instrument groups • Concept of J-side PI/secretariat team • Mission philosophy, Master Schedule • Spacecraft Engineering Overview • Instrument Team design sessions • EIS Actions  on the web Consortium Meeting 9906 - Summary of Progress - MWT

  5. Choice of configuration • Strawman/baseline - • off-axis paraboloid • 1 reflection + grating • high throughput • excellent spectral resolution • NRL proposal • Cassegrain • 2 reflections + grating • high spatial resolution NB: a 1.5 m RC radius was actually proposed Consortium Meeting 9906 - Summary of Progress - MWT

  6. Choice of configuration (2) • Cassegrain or OAP? • Technical drivers • feasibility, costphysical resourcesdisturbance torque • Structure, Optics, Detectors, Electronics • Line lists + Effective areas = useful lines in QS, AR, Flare • Consider relative value • Spatial Resolution • Count-rate/throughput • Decision-making panel ISAS, NAOJ, NASA, NRL, PPARC/MSSL • Throughput (OAP) given priority Consortium Meeting 9906 - Summary of Progress - MWT

  7. Choice of wavelength ranges • A large number of wavebands were thoroughly studied • wavelength reports on website (Solar-B EIS > documents > Science > Science Notes) • “EIS 400” - Transition region • use of novel Si/Sc multilayer • rejected at January meeting on grounds of technical immaturity of multilayer • Left with Baseline, NRL1, NRL2 • At March meeting, decided to go with Baseline+NRL1 • Short wavelength band: 170-210 Å • Long wavelength band: 250-290 Å • Bands are tuned to accept laboratory calibration lines • Consistent with ML bandpass • strong preference not to overlap in same space : prefer to have stacked spectra (á la SOHO-CDS)  on the web Consortium Meeting 9906 - Summary of Progress - MWT

  8. Optical design evolution • NRL/GSFC - produce OAP design • prioritize spectral resolution • improve spatial resolution where possible • NRL/MSSL series of teleconferences some Minutes online • discuss progress and direction of optical design • need for engineer-level round-table interaction • NRL Opto-mechanical engineering meeting • Preferred design EIS-7T • details circulated by FTP 7 May 99 ftp://tcrb.nrl.navy.mil/pub/eis/EIS7T • one of a series of optimisations • small toroidal grating - low risk & more vendor choice • grating magnification - short spectrometer section - add telescope length improve spatial resolution  on the web Consortium Meeting 9906 - Summary of Progress - MWT

  9. Outputs NRL/GSFC - reduce lengthby 10 cm - issue new optical layout EIS7Tr “reduced”ftp://tcrb.nrl.navy.mil/pub/eis/EIS7TR/ BU/MSSL - iterate structural concept, use sectional construction- include radiator placement - camera update other actions A.66-A.90see EIS-meet-cons-9905mins Meeting Objectives US, UK, J involvement review NRL/GSFC work to date approve the criteria and results (e.g. resolution) review subsystem technology & designsitems connected with main instrument suggest ideal placement iterate before BU consortium meeting Opto-mechanical engineering meeting  on the web Consortium Meeting 9906 - Summary of Progress - MWT

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