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4th Philae Post-Launch Workshop: Challenges and Solutions for Mass Spectrometry

The 4th Philae post-launch workshop in Budapest focused on critical issues following the spacecraft's launch. Attendees discussed the challenges faced with the mass spectrometry (MS) setup, specifically regarding software failures and suspected hardware issues. Despite two non-nominal events observed after powering the MS, the workshop concluded there was no permanent hardware damage. Various contingency plans, including software downgrades and step-wise testing, were proposed to ensure effective operation of the MS and minimize risks during scientific analyses.

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4th Philae Post-Launch Workshop: Challenges and Solutions for Mass Spectrometry

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  1. Status Reinhard Roll 4th Philae post-launch workshop

  2. Budapest 07: the promise • feeding a sample from oven to MS via GC, bypassing GC columns • consequence of non-operational side terminal of tapping station. • PC#8 • That was our hope!! 4th Philae post-launch workshop

  3. PC#8: the reality • New software: • MS oven via GC • better HK • data compression • thoroughly tested: Simulation, GRM, FS • MS not working any more!!! • two non-nominal events, both immediately after switch-on of the MS • Most obvious explanation: Software • suspicion: damaged hardware • one interpretation: Damage in the HV of the MS 4th Philae post-launch workshop

  4. PC#8: the reality • Contingency Slot • downgrade to previous software • step-wise testing • Romap data for error analysis (Ampere-meter) • COSAC behaved like prior to PC#8 (i.e. working) • No permanent hardware damage! 4th Philae post-launch workshop

  5. MS PC#4 PC#8, contingency COSAC, empty mass spectra under similar temperature conditions 4th Philae post-launch workshop

  6. PC#8: the reality • Conclusion • The effect looked like a hardware failure (but is not) • Real reason unknown • Software effect as only plausible cause so far 4th Philae post-launch workshop

  7. PC#9 • Set of HK values • nominal • slightly different timing (seconds, harmless) 4th Philae post-launch workshop

  8. PC#10: the plan • Patch old software to allow MS oven via GC • no data compression • Romap in parallel (just in case) 4th Philae post-launch workshop

  9. PC#10: Details • Tests first (GC heating, MS sniffing) • Go/NoGo • Software upload and verification (EAFT) • Go/NoGo • Test again (GC heating, MS sniffing) • Go/NoGo • Combined test 1 (absorption oven) • Go/NoGo • Combined test 2 (empty oven) 4th Philae post-launch workshop

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