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 by means of the pickup mirror positioned 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 cut up by optical components known as dichroism into 4 beams akin to totally different elements of the mid-infrared area. Every ray enters its personal built-in discipline unit; These elements cut up and reformat gentle from the complete discipline of view, able to be scattered into spectra. This requires bending, bouncing, and splitting the sunshine a number of occasions, making this most likely one among Webb’s most advanced gentle paths.
To complete this superb journey, the sunshine of every beam is scattered by gratings, creating spectra which might be then projected onto two MIRI detectors (two beams per detector). Wonderful 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 group paused scheduling notes utilizing this monitoring mode whereas they continued to research its habits. They’re additionally at the moment creating 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 accessible 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 assist the complete vary of Webb’s scientific targets, from observing our photo voltaic system and different planetary methods, to finding out the early universe.

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

This artist’s rendering reveals the trail to the taking pictures mode of MIRI, which gives 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 may connect to the Webb instrument compartment behind 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 totally different filters every with its personal perform (the beam takes on a lightweight blue shade 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