Solar Probe Plus Fluxgate Magnetometer QSR – Oct 2014 1

SPF MAG Quarterly Report – Oct 2014

• The MAG EM1 (EQM) (board and frame at right) was successfully electrically and mechanically integrated to the LNPS and DCB at SSL on 9/29 – 10/1/2014.

• A MAG data simulator was created to provide a magnetometer interface for FIELDS 2, necessary because we are not funded to produce yet another EM Mag. It was delivered to University of Minnesota in July 2014 for integration into FIELDS2. The photo at right shows the data simulator in its frame with mass-loading.

• Fabrication of the EM MAG sensor MLI blanket (ITO/SiOx/Aluminized Kapton) and a composite boom and titanium bracket simulator for the MAG thermal balance test (11/2014) are underway.

Top – EM1 Mag board in frame; bottom - MAG data simulator electronics with mass models.

Solar Probe Plus Fluxgate Magnetometer QSR – Oct 2014

SPF MAG Quarterly Report – Oct 2014

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• The MAG EM2 electronics and the MAG EM2 sensor (shown at right) are complete and ready for scale factor, offset, and orthogonality measurements using thin shell calibration at the MAG test site.

• The sensor Dummy Load has been completed. It connects to the MAG electronics in place of a sensor, allowing the electronics to be operated in absence of a sensor and cable.

• The multi-mag GSE board has been completed (with FPGA code and basic software) and is working on the bench. It will replace the current system, which is

Top - EM2 sensor with composite cover; bottom – Dummy Loadlimited to 4 Hz, providing background-subtracted time-correlated

sampling for up to 4 magnetometers at 256 Hz with resolution of +/- 0.015 nT in Earth field. Work continues on developing and testing the variometer mode .

Solar Probe Plus Fluxgate Magnetometer QSR – Oct 2014

Magnetometer Schedule

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2014 2015October November December January

6 13 20 27 3 10 17 24 1 8 15 22 29 5 12 19 26FPGA pre-CDR Tabletop Review (10/23) X Mag Parts List Final X Mag Mat'l List Final X Mag User Guide v3.0 X EM2 Electronics & Sensor Integration X X EM2 Electronics & Sensor Tests X X X Sensor Thermal Balance X X X X Mag pre-CDR Preparation X Mag pre-CDR (12/10) X EMI CS X Sensor Qualification Vibration X GSE Multi-Mag Variometer X X X X X X X X X X X FIELDS CDR X Mag FM Updates X X X X XMag FM-1 PCB Build X XMag FM Sensor Build X

Solar Probe Plus Fluxgate Magnetometer QSR – Oct 2014

Magnetometer Budget

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Budget Summary (9/30/2014)• Accumulative: $2,930,636 (Sept estimated as of 10/6/14)• Plan: $2,418,831 (w/o reserves)• Reserves thru FY 14 (Phase B: $390,000, FY14: $129,705) = $519,705• Total = Plan + Reserves = $2,938,536

Budget assumption differences from original proposal• Phase B

• Temperature range and cycling of sensors (mission req’t)• Design of carbon composite case (save mass)

• Phase C• Two Engineering Models (reduce risk with I&T at UCB & GSFC)• Carbon Composite build & test (save mass)• Mag simulator for FIELDS 2 (UM) (response to FIELDS redundancy)• GSE multi-mag variometer (science performance verification to

assess local magnetic field environment up to 256 Hz)• Mu-metal shield cans with 3-axis field generator (science

performance verification during S/C I&T)

Budget Projection:• 1st Quarter FY15: $402,019 Accumulative: $3,332,655