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)

Esa Kallio (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 Boot oper. 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 o Partial operation S/W to be burnt in final ROM chipset.

AMDL Space

SCU on the AIV CGS bench

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-ray shuttering @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

MIPA FM in calibration tank

• 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

PICAM QM has been successfully vibrated and shock testedThermal vacuum test ongoing, challenging set-up (-90°...+240°C)Functional testing and calibration started, to be continued after TVAngular, energy, and mass resolution have been characterisedFurther improvement of angular and mass resolution expected by fine-tuning internal voltagesFlight model hardware under manufactureIssues with non-compliant radiation hardness of front-end ASIC:requires modification, with cost and schedule impactConsequently, QM will be delivered temporarily as FM substitute

Beam image

TOF spectrum, 1 keV N+ and N2

+

QM in shock test facility

T ~ 3.15 µs

ΔT1/10 ~ 0.08 µsT/ΔT1/10 ~

39

SERENA have a look at instrument performances!

http://colombo.iaps.inaf.it/serena

Cruise PhaseELENAELENA MCP dark counts must be periodically (6 months) monitored to check functionality. STROFIOCathode 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 PICAMMIPA 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 PhaseELENAThe ELENA MCP detectors 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.STROFIOThe 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.MIPANo 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.

SERENA In-Flight calibrationBC-SRN-PL-00030_01_01_Serena_Calibration_Plan (to be issued)

SERENA SCHEDULE

SERENA SCHEDULE

SERENA SCHEDULE

SERENA SCHEDULE

SERENA update, BC-SWG# ,ESTEC,...., 2013

Thank you