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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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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 • Fabrication, Integration, and Test • Schedule: Henry Ford Help Us… • Operations Planning • Deploy and Commisioning • Etc.
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 • 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 • 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.
