Loading in 2 Seconds...
Loading in 2 Seconds...
ESA / BepiColombo MPO: SERENA Status Update Stefano Orsini (INAF/IAPS), Angelo Olivieri (ASI), Stefano Livi (SwRI), Klaus Torkar (IWF), Stas Barabash (IRF) Anna Milillo (INAF/IAPS), Peter Wurz (UniBe) EsaKallio (FMI) and the SERENA Team SERENA update, HEWG.SERENA meeting, Key Largo, May 16, 2013
SCU Status • Green • Power: Local 5V, 3,3V, 1,5V , Primary S/C 28V propagation down to Sensors I/Fs • 50 MHz Oscillator • Reset Circuitry • DSU communication / Test JIG connectivity • MEMORY: RAM and EEPROM accesses reading & writing • LOCAL H/K ADC (SPI Bus) • MAIN S/C SpaceWire I/F (hot swap tested) • REDU S/C SpaceWire I/F (hot swap tested) • PICAM SpaceWire ( with PICAM EM Emulator) • STROFIO Communication ( with Stofio EM Emulator) • ELENA Communication (with FM board) • IRQ Unit • TIMER Unit • Bootoper. both from commercial 8k PROM and Emulated 32k AMDL Prom • MIPA Power I/F and switch cmd from SCU tested but optocoupler on Main board to be adjusted • SCU Open work: H/K ADC Levels tuning, MIPA Communication • Partialoperation S/W to be burnt in final ROM chipset.
SCU on the AIV CGS bench AMDL Space FM–Test Campain CGS Milan, 3
ELENA QM: • TVTC successfully passed. A malfunction has been detected on communication but root cause individuated in commercial component present on QM that will be substituted on PFM with space qualified one. • New ITMM of ELENA provided to ESA, waiting for new thermal I/F from ASD analysis to know thermal mission scenario. • ELENA PFM: • MCP frame mechanical issue resolved: MCP detector samples passed vibration and shock tests. • Shutter functionality and stability verified with Ion beam and low energy X-ray signal. • Shutter PFM manufactured and under mechanical motion calibration. Membranes charging issue requested new ITO coating. New piezo-encoder system implemented. • ELENA PFM hardware under manufacturing • ELENA PFM unit delivery planned Soft X-rayshuttering @43kHz Ion beam_1keV shuttering @43kHz
STROFIO is thoroughly tested, fully calibrated and will be delivered on-time to the Serena suite • Performances of the sensor: • Sensitivity: nominal (0.13 (cts/s)/(1/cm3)) • Resolution: better than expected (m/∆m > 90) • FoV: nominal (+/– 10°) • Mass range: better than required (can identify elements with masses up to m=150) • Background rejection: now capable of ~35 rejection • UV rejection: better than expected (backgr. < 0.1 cts/s)
MIPA status • 2nd End-to-end test completed. MIPA QM + SCU QM. • FM fully integrated • FM mech. acceptance level test successfully conducted • FM TVAC qualification level test successfully conducted • FM calibration on-going • Performance parameters • Energy resolution 5% (nominal) • Angular resolution 6°..9° x 20°..40° (pixel dependent) (nominal) • Mass resolution (mass groups: 1, 2, 4, 8,16, >16 amu/q (nominal)) • VDA taping left prior shipment readiness MIPA FM in calibration tank
PICAM QM has been successfully vibrated and shock tested Thermal vacuum test ongoing, challenging set-up (-90°...+240°C) Functional testing and calibration started, to be continued after TV Angular, energy, and mass resolution have been characterised Further improvement of angular and mass resolution expected by fine-tuning internal voltages Flight model hardware under manufacture Issues with non-compliant radiation hardness of front-end ASIC:requires modification, with cost and schedule impact Consequently, QM will be delivered temporarily as FM substitute QM in shock test facility T ~ 3.15 µs Beam image ΔT1/10 ~ 0.08 µs T/ΔT1/10 ~ 39 TOF spectrum, 1 keV N+and N2+
SERENAhave a look atinstrument performances! http://colombo.iaps.inaf.it/serena
SERENA In-Flight calibrationBC-SRN-PL-00030_01_01_Serena_Calibration_Plan (to be issued) Cruise Phase ELENA ELENA MCP dark counts must be periodically (6 months) monitored to check functionality. STROFIO Cathode commissioning activities during the initialisation of the sensor about 20 days after the launch. Every six months, monitoring for sensor outgassing rate control and MCP dark counts. MIPA and PICAM MIPA and PICAM solar wind monitoring, by pointing their common FOV axis to face the solar wind direction (for 8-10 h continuously, at least every 6 months, possibly with shorter frequency -3 months). PICAM MCP periodic testing every six months. The measurements include gain and pulse height spectrum curves. The latter is done using the dedicated capabilities of the TIMPO32 ASIC in PICAM.
SERENA In-Flight calibrationBC-SRN-PL-00030_01_01_Serena_Calibration_Plan (to be issued) In orbit Phase ELENA The ELENA MCPdetectors are long-life MCP: given the expected signal MCP efficiency will not change significantly. Anyway, MCP background check shall be done by setting the shutter in closed configuration, so that the MCP dark count rate will be periodically monitored. STROFIO The sensor is intended to operate continuously during all orbits around Mercury. So at present, STROFIO does not require any calibration activity. But the one regularly planned to asses gain characteristics of the MCP, long term stability of the high voltage power supplies, molecular background from the spacecraft. MIPA No dedicated in-flight calibrations are foreseen. CEM performance is monitored using standard science data. PICAM PICAM shall perform a regular check of its potentials and MCP detectors. • The solar wind can be monitored by PICAM and MIPA for inter-calibrations between ion instruments. MIPA will include this test in the nominal operational procedures.
Thank you SERENA update, BC-SWG# ,ESTEC,...., 2013