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EPIC MOS Monitoring

EPIC MOS Monitoring. CAL/OPS Meeting MPE 04.-05.05.2006. MOS line monitoring. EPIC MOS line monitoring: public CCFs. EPIC MOS CCF update: new CTI+ADUCONV. CTI and ADUCONV CCFs use identical epochs New CCFs: 13 time epochs 8 pre-cooling epochs (previously 7 epochs) 5 post-cooling epochs

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EPIC MOS Monitoring

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  1. EPIC MOS Monitoring CAL/OPS Meeting MPE 04.-05.05.2006

  2. MOS line monitoring Martin Stuhlinger, ESAC

  3. EPIC MOS line monitoring: public CCFs Martin Stuhlinger, ESAC

  4. EPIC MOS CCF update: new CTI+ADUCONV • CTI and ADUCONV CCFs use identical epochs • New CCFs: 13 time epochs • 8 pre-cooling epochs (previously 7 epochs) • 5 post-cooling epochs • CTI: previously 1 epoch • ADUCONV: previously 2 epochs (correction of incorrect on-board voltages between rev.1030-1074) • See CCF release notes • CTI: XMM-CCF-REL-206 • ADUCONV: XMM-CCF-REL-207 Martin Stuhlinger, ESAC

  5. EPIC MOS CTI monitoring: new CCFs Parallel CTI MOS1 Al Parallel CTI MOS2 Al 0.06 CCD1 CCD2 CCD3 CCD4 CCD5 CCD6 CCD7 0.00 Martin Stuhlinger, ESAC

  6. EPIC MOS CTI monitoring: new CCFs Parallel CTI MOS1 Mn Parallel CTI MOS2 Mn 0.06 CCD1 CCD2 CCD3 CCD4 CCD5 CCD6 CCD7 0.00 Martin Stuhlinger, ESAC

  7. EPIC MOS CTI monitoring: new CCFs Serial CTI MOS1 Al Serial CTI MOS2 Al 0.04 CCD1 CCD2 CCD3 CCD4 CCD5 CCD6 CCD7 0.00 Martin Stuhlinger, ESAC

  8. EPIC MOS CTI monitoring: new CCFs Serial CTI MOS1 Mn Serial CTI MOS2 Mn 0.04 CCD1 CCD2 CCD3 CCD4 CCD5 CCD6 CCD7 0.00 Martin Stuhlinger, ESAC

  9. EPIC MOS line monitoring: new CCFs Martin Stuhlinger, ESAC

  10. EPIC MOS line monitoring: new CCFs Martin Stuhlinger, ESAC

  11. EPIC MOS line monitoring: new CCFs Martin Stuhlinger, ESAC

  12. EPIC MOS line monitoring: new CCFs Martin Stuhlinger, ESAC

  13. MOS2 CCD5 noise monitoring Martin Stuhlinger, ESAC

  14. MOS2 CCD5 noise monitoring: MOS2 Martin Stuhlinger, ESAC

  15. MOS2 CCD5 noise monitoring: MOS1 Martin Stuhlinger, ESAC

  16. MOS1 CCD4 example subsequent exposures Martin Stuhlinger, ESAC

  17. MOS2 CCD5 noise monitoring • Still searching possible triggers • No trigger found from HK parameters: • Radiation monitors (HE0, LE0, RGS1, RGS2) • MOS2 CCD5 voltages (K1181-1196) • MOS2 Focal plane temperature (K1253) • Many more temperatures and voltages (EMVC, EMCR,…) • Any idea? • Search will be repeated for MOS1 CCD4 • Sudden appearance • Shows decay Martin Stuhlinger, ESAC

  18. Monitoring of the “meteoroid” column in MOS1 CCD1 Martin Stuhlinger, ESAC

  19. Column appears and disappears • Column was off since change of on-board offset June 2005. • Re-appeared in rev. 1100-1115: Diagnostic shows column offset to be 130 ADU (instead of 123 ADU). • At lower level or disappeared in rev. 1116-1122: Diagnostics show column offset back on expected level. • During and after eclipse phase rev.1123-1135 column sometimes is hot and sometimes normal. • Not hot column from rev. 1136-1148. • Column present in single exposures from 1149-1156. • Not hot column since rev. 1157 (-1172). Martin Stuhlinger, ESAC

  20. EPIC telemetry monitoring Martin Stuhlinger, ESAC

  21. Required telemetry of EPIC instruments Martin Stuhlinger, ESAC

  22. Required EPIC telemetry after rev. 620 Martin Stuhlinger, ESAC

  23. Conclusion • CTI: • Parallel CTI very stable since cooling. Nearly constant over the last 600 revolutions! • Serial CTI stable since cooling. Only MOS2 CCD7 showed a step-like degradation. • Line monitoring: • Line energies within 5 eV for all epochs. • Line widths (FWHM) stable since cooling: ~80 eV at Al energy and ~140 eV at Mn energy • MOS2 CCD5 noise: • In MOS2 CCD5 present in phases all over the mission. • Possible triggers not yet found. • MOS1 CCD4 suddenly highly affected, slow decrease. • Single appearances several CCDs. Martin Stuhlinger, ESAC

  24. Conclusion • MOS1 (sometimes hot) meteoroid column: • Stable for 6 months after change of on-board offset. • Re-appeared after save/idle mode and (some) eclipses. • Possible triggered by temperature changes? Unlikely! • Change of the EPIC BRAT: • Decrease MOS telemetry to 12 kbits/sec. • Increase pn telemetry to 24 kbits/sec. • After rev. 620: 112 MOS1 and 91 MOS2 observations require more than 12 kbits/sec, but nearly all suffer from high background radiation. • Less than 20 observation without high background radiation require more than 12 kbits/sec. • Details see XMM-SOC-OPS-TN-006. Martin Stuhlinger, ESAC

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