GMAGAO-X R-15 OAP Polishing

[dmkelly42]

Risk creation date: 2/13/2024

Last Modified: 2/13/2024

Risk type: Technical

Risk Approach: Mitigate

Risk Owner: Laird Close

Risk Statement:

If the OAPs cannot be polished to surface specifications, the instrument will not meet its Strehl requirement.

Risk Effects:

There are 2 OAPs in the foreoptics, 6 OAPs in the wavefront sensor, and 5 OAPs in the coronagraph. If the OAPs are not polished to our tight specifications, they will introduce aberrations and scattered light that will prevent GMagAO-X from meeting its Strehl requirement. This will impact the limiting magnitude and the contrast of the instrument.

Risk Assessment:

Risk Ratings	Likelihood	Consequence
Initial	3	3
Current	3	3
Target	2	2

Initial Risk Notes:
There is a requirement for the AO system to deliver a Strehl of 70% on a 5th magnitude star at H-alpha.

Risk Notes/Updates:

Cost Impacts:

Estimated cost if risk is realized:

Explanation for cost risk:

Risk mitigation list:

• Perform trade study of tolerances vs science goals

• Pay a premium for "super" polishing

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