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THEMIS Electric Field Instrument (EFI) Mission CDR The THEMIS EFI Team. Outline. Personnel and Organization Summary of EFI Status at MCDR Requirements, Specifications, and Design Compliance Requirements Top-Level Design Error Budgets Status of Subsystem Design, Fabrication, and Testing

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Presentation Transcript


Outline

  • Personnel and Organization

  • Summary of EFI Status at MCDR

  • Requirements, Specifications, and Design Compliance

    • Requirements

    • Top-Level Design

    • Error Budgets

  • Status of Subsystem Design, Fabrication, and Testing

  • Fabrication, Integration, and Test

  • Schedule: Henry Ford Help Us…

  • Operations Planning

    • Deploy and Commisioning

    • Etc.


Personnel and organization
Personnel and Organization

  • Organizational Chart (all UCB unless noted):

    • Prof. F. Mozer (EFI Co-I).

    • Drs. J. Bonnell, G. Delory, A. Hull (Project Scientists)

    • P. Turin (Lead ME), Dr. D. Pankow (Advising ME)

    • B. Donakowski (EFI Lead ME, SPB, Facilities)

    • G. Dalton (SPB, EFI GSE ME), K. McKee (ME), S. Martin (MT)

    • R. Duck (AXB ME)

    • D. Schickele (Preamp, Sensor Cables, Facilities ME)

    • S. Grimmer, R. Gupta (ME GSRs)

    • S. Jelinsky, S. Marker (Facilities and TVAC Staff)

    • S. Harris (BEB Lead EE), H. Richard (BEB EE)

    • J. Lewis, F. Harvey (GSE)

    • Technical Staff (H. Bersch, Y. Irwin, H. Yuan, B. Dalen, N. Castillo) Wm. Greer (UCLA), et al.)

    • R. Ergun (DFB Co-I; CU-Boulder)

    • J. Westfall, A. Nammari, K. Stevens (DFB SysE, EEs; CU-Boulder)

    • C. Cully (DFB GSR; CU-Boulder)


Efi status at i cdr
EFI Status at I-CDR

  • Requirements and Design:

    • The current EFI design meets Mission and Instrument requirements.

    • The design is complete.

    • One new requirement (CG positioning) has been imposed post-PDR.

  • Procurement:

    • All long-lead items have been procured in sufficient quantities to allow for ETU and initial FLT production:

      • EEE parts ordered; rad testing of required parts complete.

      • SPB and AXB mechanical items (custom wire cable, stacers, actuators, motors) are in-house, or on order with expected delivery on schedule for FLT build up.

      • FLT machining on order, with expected 25% fulfilment (1-1/2 SC of parts) by early July, and remainder by end of July.

  • Personnel:

    • Team is complete:

      • All design engineering positions filled.

      • One FT MT position filled Mar ’04; 0ne PT MT positions filled internally by personnel transitioning over from STEREO; two ME GSRs hired for summer and fall to support FLT production startup.

  • Assembly and Test:

    • ETUs of all major elements have been assembled and partially or largely tested.

    • Testing will be completed by July 2004.


Rfa and design trade closure
RFA and Design Trade Closure

  • RFAs from I-PDR, M-PDR, and I-CDR all responded to a/o closed out:

    • ESC Spec is on Rev. D1; includes detailed specs on the requirement and methods to achieve it; ESC roster developed in Feb ’04, allowing close collaboration between Swales and UCB on problem areas and mitigation techniques.

    • EMI Spec completed Mar ’04.

    • Detailed Instrument I&T plan under development as part of ETU Testing; synthesized from Polar, Cluster, etc.

    • Mechanical (INST-RFA 13, 14, 15, 19, 20, R03), and Electrical (INST-RFA 16AB, 17) arising from ICDR, as well as Internal Mechanical Review.

  • Open Design Trades from PDR closed out:

    • Boom lengths set at 50/40/7.67 meters tip-to-tip based on CBE of Probe mass properties and std. GSFC and UCB dynamic stability requirements and boom mode resonance keep-outs.

    • Ti-N chosen over DAG-213 for SPB sensor coating.

    • Heritage brushed motor chosen for SPB deploy.

    • Braid biasing selected, and Distal Braid length set at 3 m.

    • DAC implementation on BEB chosen (ADC5544), and bias offset range of +/- 40 V maintained.

    • EFI filters on DFB chosen to be Bessel-type.











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