THEMIS Instrument FM 23 PreEnvironmental Review Environments Jeremy

THEMIS Instrument FM 2/3 Pre-Environmental Review Environments Jeremy Mc. Cauley University of California - Berkeley THEMIS Instrument FM 2/FM 3 PER Environments-1 Teleconference 8/30/2005

F 2 -3 Suite I&T Flow INSTRUMENT PERs AXB INSTRUMENT TESTING SUITE INTEGRATION IDPU/SUITE ENVIRONMENTS SUITE DELIVERY THEMIS Instrument FM 2/FM 3 PER SPB SST FGM/SCM Inst. Vibration Inst. Thermal Inst. Delivery Suite STM Suite Phasing Test Suite PER 30 AUG 2005 IDPU/ESA Vibration 30 AUG 2005, 1 SEP 2005 Magnetic Screening Suite Test Review Environments-2 Suite SC Test 12, 25 JUL 2005 IDPU/ESA Thermal 2 -6 SEP 2005 • 2 cycles T-V • Bake-out +60 C Suite Delivery Suite Thermal 8 -14 SEP 2005 • 6 cycles T-V • EFI Functional (Level 1) Bus INT Teleconference 8/30/2005

IDPU+ESA Vibe Testing Vibration Plan • 3 -Axis, Sine and Random to Acceptance Levels • Details contained in THM-ESA-PRC-007, THEMIS ESA + IDPU Acceptance Vibration Test Procedure , Rev. A (unchanged from F 1) THEMIS Instrument FM 2/FM 3 PER Environments-3 Teleconference 8/30/2005

Magnetic Testing Magnetic Screening Plan • Box level screening • Deperm with 40 Grms, Map with 2 axis rotation of unit within coil system • Details contained in THM-MINT-PROC-121, THEMIS Component Magnetic Test Procedure THEMIS Instrument FM 2/FM 3 PER Environments-4 Teleconference 8/30/2005

Thermal Testing Outline Cycle Accumulation • • • 2 cycles at instrument level - constrained by schedule 6 cycles at instrument suite level 4 cycles at spacecraft level 12 cycles total for every flight instrument 4 hour soaks at hot and cold targets Every TVAC test is preceded by a PER where thermal engineer signs off on procedure Thermal Balance • Done on one flight or flight like unit only at the instrument level • Instrument level balance verifies conductance, absorptance, and emittance properties • Instrument thermal design is verified at the probe level on P 1 THEMIS Instrument FM 2/FM 3 PER Environments-5 Teleconference 8/30/2005

IDPU/ESA TV Testing TV Plan • 2 Component-Level TV Cycles Prior to Suite Level I&T • • Survival, Cold Start and Bake-out (TQCM Monitor) Details contained in THM-ESA-PRC-0016, THEMIS ESA + IDPU Thermal Vacuum Test Procedure, Rev. 2. 0 (unchanged from F 1) THEMIS Instrument FM 2/FM 3 PER Environments-6 Teleconference 8/30/2005

ESA/IDPU Thermal Testing Status • F 1 IDPU needs to be retested after rework THEMIS Instrument FM 2/FM 3 PER Environments-7 Teleconference 8/30/2005

FGM Thermal Testing Status • • F 4 FGS was not conductively mounted correctly in first qualification test. Retest was done in air at limits shown No changes since F 1 PER THEMIS Instrument FM 2/FM 3 PER Environments-8 Teleconference 8/30/2005

SCM Thermal Testing Status • • Thin crack in the potting for two antennas during first ETU test. Potting method reworked and retested No changes since F 1 PER THEMIS Instrument FM 2/FM 3 PER Environments-9 Teleconference 8/30/2005

SCM/FGM Boom Thermal Testing Status • • • F 1 booms re-named F 6 after anomalous vibration results F 1 SCM and FGM will get a total of 4 cycles at the instrument suite level instead of the normal 8 due to the swap of F 1 and F 6 F 1/F 2 retested twice due to test setup errors THEMIS Instrument FM 2/FM 3 PER Environments-10 Teleconference 8/30/2005

SST Thermal Testing Status • • Some ITO coated silver Teflon thermal control tape with 9703 conductive adhesive from the STEREO project was thermal vac tested separately and it passed conductance and adhesion tests THEMIS tape was tested after it arrived and it failed. We reworked the application method and retested and the tape passed. Further testing planned. F 3 renamed F 4 and F 4 renamed F 3 All units need to be retested following mezzanine board rework THEMIS Instrument FM 2/FM 3 PER Environments-11 Teleconference 8/30/2005

EFI Pre. Amp Thermal Testing Status • • ETU 1 Preamp had no problems but FR 4 board was switched to Thermount 85 NT for ETU 2 and flight Six ETU 2 Qual Units went through 24 cycles, Two of those units added an additional 14 cycles for a total of 38 Upper limit recently changed from 65 to 90 in September 04 due to receipt of optical testing data on DAG 213. No changes since F 1 PER THEMIS Instrument FM 2/FM 3 PER Environments-12 Teleconference 8/30/2005

EFI Pre. Amp Thermal Testing Setup THEMIS Instrument FM 2/FM 3 PER Environments-13 Teleconference 8/30/2005

EFI SPB Thermal Testing Status • • • Qual ETU motor was a motor only stress test, no problems seen SPB design changed from flying with doors closed to flying with doors open. ETU was retested after the small modifications this required Calibration runs done with the sphere keyreels to determine release tension at hot and cold deployment conditions SPB unit has completed thermal balance testing No changes since F 1 PER THEMIS Instrument FM 2/FM 3 PER Environments-14 Teleconference 8/30/2005

EFI AXB Thermal Testing Status • • Due to delivery schedules to Swales we were unable to include the AXBs in the suite testing. They accumulated the 6 suite cycles on their own All testing completed except balance test THEMIS Instrument FM 2/FM 3 PER Environments-15 Teleconference 8/30/2005

Suite TV Testing TV Plan • F 2 and F 3 Suites Together • 6 Suite Level TV Cycles, Survival, Cold Start and Bake-out (TQCM Monitor) • Details contained in THM-SYS-PRC-004, THEMIS INSTRUMENT SUITE Thermal Vacuum Test Procedure , Rev. B (unchanged from F 1) THEMIS Instrument FM 2/FM 3 PER Environments-16 Teleconference 8/30/2005

Instrument Suite Thermal Testing Status • • Due to an error F 1 Suite did not go to the cold survival temperature before turn on. All units have separately been turned on at their cold survival limit. F 2 -F 5 will be tested to the – 60 survival temperature THEMIS Instrument FM 2/FM 3 PER Environments-17 Teleconference 8/30/2005