The problem was discovered on the James Webb Space Telescope – MIRI Anomaly

Cute Webb MIRI Animation

James Webb Area Telescope MIRI Spectroscopy: The beam of sunshine coming from the telescope is then displayed in darkish blue because it enters the machine via the pickup mirror situated on the high of the machine and acts like a binoculars.
Subsequent, a sequence of mirrors redirect the sunshine in direction of the underside of the devices the place there’s a set of 4 spectral items. As soon as there, the sunshine beam is break up by optical parts referred to as dichroism into 4 beams equivalent to completely different components of the mid-infrared area. Every ray enters its personal built-in discipline unit; These parts break up and reformat gentle from your complete discipline of view, able to be scattered into spectra. This requires bending, bouncing, and splitting the sunshine a number of occasions, making this in all probability one in all Webb’s most complicated gentle paths.
To complete this superb journey, the sunshine of every beam is scattered by gratings, creating spectra which are then projected onto two MIRI detectors (two beams per detector). Superb engineering feat! Credit score: ESA/ATG medialab

Mid-infrared machine operations replace

The[{” attribute=””>تلسكوب جيمس ويب الفضائيتمتلك أداة الأشعة تحت الحمراء المتوسطة (MIRI) أربعة أوضاع للرصد. أثناء الإعداد لملاحظة علمية في 24 أغسطس ، أظهرت آلية تدعم أحد هذه الأوضاع ، والمعروفة باسم التحليل الطيفي متوسط ​​الدقة (MRS) ، ما يبدو أنه زيادة في الاحتكاك. هذه الآلية عبارة عن عجلة محززة تسمح لعلماء الفلك بالاختيار بين الأطوال الموجية القصيرة والمتوسطة والطويلة عند إجراء الملاحظات باستخدام وضع MRS. بعد الفحوصات والتحقيقات الصحية الأولية في هذه القضية ، اجتمع مجلس مراجعة الحالات الشاذة في 6 سبتمبر لتقييم أفضل مسار للمضي قدمًا.

The Webb staff paused scheduling notes utilizing this monitoring mode whereas they continued to research its conduct. They’re additionally presently growing methods to renew MRS observations as quickly as potential. The observatory is wholesome, and the opposite three MIRI monitoring modes – imaging, low-resolution spectroscopy, and coronagraph – are working usually and stay out there for scientific observations.

The James Webb Area Telescope’s (MIRI) instrument sees gentle within the mid-infrared area of the electromagnetic spectrum, with wavelengths longer than our eyes can see.

MIRI permits scientists to make use of a number of observational strategies: imaging, spectroscopy, and chromography to help the complete vary of Webb’s scientific targets, from observing our photo voltaic system and different planetary programs, to finding out the early universe.

To pack all of those modes right into a single instrument, the engineers designed a fancy optical system through which the sunshine coming from the Webb telescope follows a fancy 3D path earlier than lastly reaching the MIRI detectors.

This artist’s rendering reveals the trail to the capturing mode of MIRI, which supplies each photocopy and chorograph capabilities. It additionally incorporates a easy spectrophotometer. We first take a look at its mechanical construction with three outstanding pairs of carbon fiber trusses that can connect to the Webb instrument compartment in the back of the telescope.

The pickup mirror, which acts like a binoculars, receives the sunshine from the telescope, proven in darkish blue, and directs it to the imaging unit at MIRI. Contained in the machine, a system of mirrors reconfigures and redirects the sunshine beam till it reaches the filter wheel the place the specified vary of mid-infrared wavelengths is chosen from a set of 18 completely different filters every with its personal perform (the beam takes on a light-weight blue colour within the animation).

Lastly, one other set of mirrors takes the beam of sunshine rising from the filter wheel and reconstructs the picture of the sky on the MIRI detectors.

Credit score: ESA/ATG medialab