1 / 6

X-ray Missions Delta: AXSIO Redux

X-ray Missions Delta: AXSIO Redux. Orbital Debris and End of Mission Plans Ivonne Rodriguez 30 April – 1 May, 2012. Subsystem Agenda. Micrometeoroid Damage Assessment Update Issues / Potential Risks / Future work Acronym List.

dreama
Download Presentation

X-ray Missions Delta: AXSIO Redux

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript


  1. X-ray Missions Delta:AXSIO Redux Orbital Debris and End of Mission Plans Ivonne Rodriguez 30 April – 1 May, 2012

  2. Subsystem Agenda • Micrometeoroid Damage Assessment Update • Issues / Potential Risks / Future work • Acronym List

  3. Micrometeoroid Damage Assessment Update: Structure and Components • Structure assessment • Damage is function of lifetime only. Structure is the same as in the previous AXSIO analysis. • Failure is defined as penetration of both facesheets. As a result, knowledge of maximum hole size is useful to put the damage in perspective. • Added maximum hole diameter (Not included in first AXSIO assessment). • Number of expected penetrations is reduced from 5 to 3. • Representative Components • Failure defined as penetration of surface. • Probability of tank damage is small because of structural shielding. Lifetime reduction does not reduce significantly the already low probability of damage. • In both analyses, the MEM 1c meteoroid environment model was used, to be consistent with the 2011 assessment.

  4. Micrometeoroid Damage Assessment Update: FMA analysis • Analysis of particles striking the calorimeter from the FMA side: • FMA analysis not performed in 2011 analysis. • Assumed 3-mm glass window or filter in front of the detector. • Most particles reaching the calorimeter do not produce permanent damage to the instrument; damage is likely to be limited to temporary bright pixels and minimum cratering to the glass (micron size). • A particle of 0.05 cm is capable of penetrating the glass; however, the probability of that event is very low. • The Grun interplanetary flux model was used in this analysis be consistent with previous grating incidence analyses.

  5. Issues / Potential Risks / Future work • The metering structure has a high probability of receiving about 3 penetrations by micrometeoroids during the 3 years of the mission. The predicted minimum hole diameter is approximately 0.47 cm. • A thicker structure would reduce the probability and number of penetrations. However, if the penetration ever occurs, the hole diameter would be larger (a bigger particle needed to perforate the structure). • Previous analysis predicted ≈ 5 penetrations for the same structure. • Slight improvement in probability of penetration for other components. • The analysis of the FMA predicts a high probability of < 3 particles reaching the detector from the telescope side. Because of the particle size, no permanent damage to the instrument is expected.

  6. Acronym List • FMA – Flight Mirror Assembly • MEM – Micrometeoroid Engineering Model

More Related