In this illustration, the multilayered sunshield on NASAs James Webb Space Telescope extends underneath the observatorys honeycomb mirror. The sunshield is the very first step in cooling off Webbs infrared instruments, however the Mid-Infrared Instrument (MIRI) needs additional aid to reach its operating temperature level. Credit: NASA GSFC/CIL/Adriana Manrique Gutierrez
The Mid-Infrared Instrument (MIRI) on NASAs James Webb Space Telescope has four observational modes. After determining increased friction in one of the grating wheels utilized in MIRIs medium resolution spectrometry (MRS) mode, the Webb team stopped briefly science observations utilizing this particular mode on August 24. Ever since, a team of professionals has actually performed an in-depth investigation that has actually evaluated instrument style in addition to postlaunch and historical data.
The team concluded the concern is most likely brought on by increased contact forces between sub-components of the wheel main bearing assembly under particular conditions. Based upon this, the team vetted a strategy and developed for how to use the affected mechanism during science operations.
The James Webb Space Telescope will check out the infrared Universe. It will use 4 cutting-edge instruments, consisting of the Mid-InfraRed Instrument. MIRI supports all of Webbs science objectives.
By NASA
November 8, 2022
The sunshield is the first step in cooling down Webbs infrared instruments, but the Mid-Infrared Instrument (MIRI) requires additional help to reach its operating temperature level. The Mid-Infrared Instrument (MIRI) on NASAs James Webb Space Telescope has 4 observational modes. Webb will resume MIRI MRS science observations by Saturday, November 12, beginning with an unique opportunity to observe Saturns polar regions, simply prior to they end up being unobservable by Webb for the next 20 years.
An engineering test was executed Wednesday, November 2, that effectively demonstrated predictions for wheel friction. Webb will resume MIRI MRS science observations by Saturday, November 12, beginning with a special opportunity to observe Saturns polar regions, prior to they become unobservable by Webb for the next 20 years. The group will schedule additional MRS science observations, at first at a limited cadence, following a plan to keep the afflicted wheel in balance, monitor wheel health, and prepare MIRI MRS for a go back to full science operations.
