Name: Ground-Based Testing of Replacement Thermal Control Materials for the Hubble Space Telescope (en Inglés)
SKU: 59974197
Price: 31.53 USD
Availability: InStock
Author: Townsend, Jacqueline a. ; Nasa Technical Reports Server (Ntrs) ; Et Al
ISBN: 9781289269685

portada Ground-Based Testing of Replacement Thermal Control Materials for the Hubble Space Telescope (en Inglés)

Ground-Based Testing of Replacement Thermal Control Materials for the Hubble Space Telescope (en Inglés)

Formato

Libro Físico

Autor

Nasa Technical Reports Server (Ntrs)

Jacqueline a. Townsend

Editorial

Bibliogov

Idioma

Inglés

N° páginas

Encuadernación

Tapa Blanda

Dimensiones

24.6x18.9x0.2 cm

Peso

0.08 kg.

ISBN13

9781289269685

Categorías

Política y gobierno

Ground-Based Testing of Replacement Thermal Control Materials for the Hubble Space Telescope (en Inglés)

Nasa Technical Reports Server (Ntrs) (Autor) · Jacqueline a. Townsend (Autor) · Bibliogov · Tapa Blanda

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Reseña del libro "Ground-Based Testing of Replacement Thermal Control Materials for the Hubble Space Telescope (en Inglés)"

The mechanical and optical properties of the metallized Teflon FEP thermal control materials on the Hubble Space Telescope (HST) have degraded over the nearly seven years the telescope has been in orbit. Given the damage to the outer layer of the multi-layer insulation (MLI) that was apparent during the second servicing mission (SM2), the decision was made to replace the outer layer during subsequent servicing missions. A Failure Review Board was established to investigate the damage to the MLI and identify a replacement material. The replacement material had to meet the stringent thermal requirements of the spacecraft and maintain mechanical integrity for at least ten years. Ten candidate materials were selected and exposed to ten-year HST-equivalent doses of simulated orbital environments. Samples of the candidates were exposed sequentially to low and high energy electrons and protons, atomic oxygen, x-ray radiation, ultraviolet radiation and thermal cycling. Following the exposures, the mechanical integrity and optical properties of the candidates were investigated using Optical Microscopy, Scanning Electron Microscopy (SEM), a Laboratory Portable Spectroreflectometer (LPSR) and a Lambda 9 Spectroreflectometer. Based on the results of these simulations and analyses, the Failure Review Board selected a replacement material and two alternates that showed the highest likelihood of providing the requisite thermal properties and surviving for ten years in orbit.