THEMIS INSTRUMENT SUITE FM 2FM 3 PRESHIP REVIEW

THEMIS INSTRUMENT SUITE FM 2/FM 3 PRE-SHIP REVIEW FM 4/FM 5 PRE-ENVIRONMENTAL REVIEW INTRODUCTION Davin Larson Thomas Moreau SST Team University of California - Berkeley FM 2/FM 3 IPSR AND FM 4/FM 5 IPER SST 1 UCB, November 10, 2005

Outline • Summary of SST Status at FM 1 PSR • FM 1 -5 Configuration by SN • End-Item Data Package • Final Test and Cal Results vs. Requirement Fulfillment • Open Items FM 2/FM 3 IPSR AND FM 4/FM 5 IPER SST 2 UCB, November 10, 2005

Flight Configuration • Current flight configuration of sensors and DAPs for all flight units. FM 2/FM 3 IPSR AND FM 4/FM 5 IPER SST 3 UCB, November 10, 2005

FM 1 EIDP: Sensors • THEMIS SST Sensor: (Sensor 1: Binder #33; Sensor 2: Binder #34) • Electrical Assembly • Schematics • Electrical Assembly Records • Rework/Repair history • Electrical test results • QA signoffs • Mechanical Assembly • Mechanical drawings • Vibration test results • Thermal Vac test results • Assembly Records. • Special TVAC Acceptance Test Data. FM 2/FM 3 IPSR AND FM 4/FM 5 IPER SST 4 UCB, November 10, 2005

FM 1 EIDP: DAP • THEMIS SST DAP: (Binder#2) • Schematics • Electrical Assembly Records • Rework/Repair history • Electrical test results • QA signoffs FM 2/FM 3 IPSR AND FM 4/FM 5 IPER SST 5 UCB, November 10, 2005

SST Vibration Testing (Pictures of Probe 2 units) FM 2/FM 3 IPSR AND FM 4/FM 5 IPER SST 6 UCB, November 10, 2005

SST Acceptance Level Dynamic Test SST Serial Number Test Date Following Initial Build Retest Date (Rework/Redesign) 13 Jan 05 Oct 11, 2005 (full-qual) 22 Apr 05 Nov 4, 2005 (workmanship) June 13, 2005 Nov 4, 2005 (workmanship) May 6 2005 Nov 7, 2005 (workmanship) Nov 7 2005 Not needed 001, 002 003, 004 006, 008 007, 009 011, 012 005, 010 FM 2/FM 3 IPSR AND FM 4/FM 5 IPER Mechanical assembly complete, awaiting electronics SST 7 UCB, November 10, 2005

SST Acceptance Level Dynamic Test Per UCB THEMIS Document THM-SST-PRC-002 • • • All 3 Axes Sine Survey, 0. 5 G, 5 – 2000 Hz Sine Strength per Swales TM 2430 -Rev. D, 29 November 2004 Random – Per Swales Document TM 2430 -Rev. D – 12. 51 G RMS – 1 min duration per axis All Vibration Testing Performed at Quanta Laboratories Retesting (if required) • • ‘Workmanship Shake’ – Validate any design changes following original Flight build shake – Validate rework of any failures on previous vibration test Entire vibration protocol, single axis only Acceptance Sine Strength Specification FM 2/FM 3 IPSR AND FM 4/FM 5 IPER SST Flight Unit SST 8 Acceptance Level Random Specification UCB, November 10, 2005

SST Acceptance Level Dynamic Test • Deviations from Test Specification (Notching/Force Limiting/Aborts) - None • • SST First Natural Frequency: 213 Hz (Requirement: >75 Hz) Good Sine Survey Consistency from Unit to Unit (within 10 Hz) • Retesting due to Hardware Redesign 1. Reinforcement plate bond failure led to stress fracture formation on SST 001 support structure • • • Resolution: Support structure redesigned and strengthened in high stress areas Flight-like ETU passed qualification level dynamic test performed on 2 Feb 2005 Flight Unit Status • • • Flight Units for Probe 1 scheduled for 2 nd vibration test upon completion of suite level testing Flight Units for Probe 2 completed vibration testing on 22 April 2005 Flight Units for Probe 3 scheduled for vibration testing on 6 May 2005 X-Axis Testing FM 2/FM 3 IPSR AND FM 4/FM 5 IPER Y-Axis Testing SST 9 Z-Axis Testing UCB, November 10, 2005

SST TVAC Testing SST Serial Number Test Date Following Initial Build Retest Date (Rework/Redesign) 5 Jan 05 Not needed 28 Apr 05 Not needed Sept 7, 2005 schedule for week of 11 -15 -2005 ? ? retest of SMA to – 50 C May 25, 2005 not needed Nov 7 2005 schelduled for week of 11 -15 -2005 ? ? Mechanical assembly complete, awaiting electronics ? ? 001, 002 003, 004 006, 008 007, 009 011, 012 005, 010 FM 2/FM 3 IPSR AND FM 4/FM 5 IPER SST 10 UCB, November 10, 2005

Thermal Profile Procedure: THM-SST-PRC-003 FM 2/FM 3 IPSR AND FM 4/FM 5 IPER SST 11 UCB, November 10, 2005

SST -Magnetic cleanliness SST Magnetic Cleanliness Testing Status • • All units have been tested and are nominal. Sensors 3, 4, 6, 8, 7, 9, 11 and 12 should be retested following recent vibration tests. FM 2/FM 3 IPSR AND FM 4/FM 5 IPER SST 12 UCB, November 10, 2005

SST Requirements SST Mission Requirements Fulfillment: • FM 1 MR fulfillment noted in THEMIS Verification Matrix (see MSE Presentation) • Integrated SST and component parts compliant with mission requirements FM 2/FM 3 IPSR AND FM 4/FM 5 IPER SST 13 UCB, November 10, 2005

Open PFRs FM 2/FM 3 IPSR AND FM 4/FM 5 IPER SST 14 UCB, November 10, 2005

PFR - 97 -Resolution Options to reduce noise susceptibility: • • Improve sensor internal shielding. - Done Remove caps on line. - Done Switch power and return lines. - Unnecessary Eliminate heater altogether. – Unnecessary Resolution- • Identified as a poorly grounded Al shield tape. • Replaced with properly grounded Cu shield. This was a rather difficult problem to track down because it would only happen to some sensors (not the ETU) after several hours under vacuum and was only observable with an injected noise source. FM 2/FM 3 IPSR AND FM 4/FM 5 IPER SST 15 UCB, November 10, 2005

PFR - 101 -Resolution SMA (partial) failure on FM 3 sensor • • • Occurred as a result of mishandling during reassembly. Discovered almost immediately, repaired same day. Bench tests (in air) were successful Tests in suite T/V were successful. Awaiting retest of 1 cycle to – 50 C. FM 2/FM 3 IPSR AND FM 4/FM 5 IPER SST 16 UCB, November 10, 2005

Results of Testing/Calibration • • Energy Threshold vs temperature measured and acceptable Energy resolution acceptable (<13 ke. V at 5 C). Detector gain measured and is stable over temperature. Channel crosstalk measured and acceptable (<20 ke. V) Attenuator functions over full operational Temp range. Heater/Thermostat Functional at < -50 C *! Magnetic moments measured and deemed acceptable. End to End performance verified. • (*!) Noise susceptibility from BAU is very low now FM 2/FM 3 IPSR AND FM 4/FM 5 IPER SST 17 UCB, November 10, 2005

FM 1 - Update • SPB (Sun Pulse Blockout) Mod#2 has made the sensor susceptible to external noise sources, in particular, noise on the Heater return line. (this line originates on the BAU). Risk: moderate. Update: replacement of heater shielding has made susceptibility extremely low. Risk: very low. • SST sensors 01 and 02 (FM 1) require final qualification vibration test (Done) and subsequent recalibration (mostly done) /functional testing (Done). Risk: very low - 7 sensors have already passed qual vibration tests. FM 2/FM 3 IPSR AND FM 4/FM 5 IPER SST 18 UCB, November 10, 2005

Open Issues Still left to do: • • • Ion calibration of sensors 4, 6, 7, 9, 11 and 12 (½ of P 2, ½ of P 3, P 4 and P 5) Thermal Vac re-test of Sensor 6 (½ of P 3 ) Thermal Vac test of Sensors 11 & 12 (P 5) FM 2/FM 3 IPSR AND FM 4/FM 5 IPER SST 19 UCB, November 10, 2005

Miscellaneous Calibration Data FM 2/FM 3 IPSR AND FM 4/FM 5 IPER SST 20 UCB, November 10, 2005

Response to electron gun FLIGHT#2 – S 3 A Foil 22 ke. V 26 ke. V 30 ke. V 34 ke. V 38 ke. V 42 ke. V 46 ke. V • Energy threshold measured < 30 ke. V at cold temperature FM 2/FM 3 IPSR AND FM 4/FM 5 IPER SST 21 UCB, November 10, 2005

Response to low-energy proton FLIGHT#2 – S 3 B Open 30 ke. V 35 ke. V 75 ke. V 100 ke. V 150 ke. V • Protons measured above 30 ke. V (at room temperature) • Energy threshold expected < 30 ke. V at cold temperature FM 2/FM 3 IPSR AND FM 4/FM 5 IPER SST 22 UCB, November 10, 2005

Response to low-energy oxygen FLIGHT#2 – S 3 B Open 60 ke. V 75 ke. V 100 ke. V 150 ke. V • Oxygen measured above 60 ke. V (at room temperature) • Energy threshold expected < 60 ke. V at cold temperature FM 2/FM 3 IPSR AND FM 4/FM 5 IPER SST 23 UCB, November 10, 2005

• Noise Threshold Vs. Temperature FM 2/FM 3 IPSR AND FM 4/FM 5 IPER SST 24 UCB, November 10, 2005