File:EL-1994-00018.jpeg
Size of this preview: 585 × 600 pixels. Other resolutions: 234 × 240 pixels | 468 × 480 pixels | 749 × 768 pixels | 999 × 1,024 pixels | 2,408 × 2,468 pixels.
Original file (2,408 × 2,468 pixels, file size: 698 KB, MIME type: image/jpeg)
File information
Structured data
Captions
Summary edit
DescriptionEL-1994-00018.jpeg | LDEF (Flight), AO178 : A High-Resolution Study of Ultra-heavy Cosmic-Ray Nuclei, Tray A10 The flight photograph of the Ultra Heavy Cosmic Ray Experiment (UHCRE) was taken while the LDEF was attached to the Orbiter's RMS arm prior to berthing in the Orbiter's cargo bay. The white paint dots on the clamp blocks located at the center of the experiment trays upper and right flanges appear to be in prelaunch condition while the one located at the left end of the trays lower flange appears slightly discolored. Note the dark brown stain on the LDEF structure adjacent to the edge of the black thermal cover. The UHCRE detectors were contained in 16 peripheral LDEF trays with at least one UHCRE tray located on each row of the LDEF except row 3, row 9 and row 12. Each tray contains three cylindrical aluminum pressure vessels with an integral aluminum support structure. Each cylinder is filled with an Eccofoam insert that houses 4 UHCRE detector stacks. Each stack consist of layers of Lexan polycarbonate sheets (approximately 70) interleaved with several thin sheets of lead. Forty-seven of the 48 pressure vessels were pressurized to 1.0 bar of a dry gas mixture (oxygen, nitrogen and helium) and sealed. One of the units was left unsealed in order to investigate the effects of the vacuum environment on the detector materials. Thermal control was accomplished by attaching an aluminized Kapton thermal cover on the tray bottom (the Kapton facing the LDEF interior), placing the aluminum cylinder support structure on thermal isolators and covering the experiment with a thin (5 mil) silvered TEFLON® thermal cover. The silvered TEFLON® cover was supported by an aluminum frame, an integral part of the experiment structure, and held in place by Velcro pads selectively located on the frame and on the back of the cover. The copper colored strip extending over the trays right flange is a copper coated pressure sensitive tape used to provide an electrical ground between the experiments thermal cover and the LDEF structure. The UHCRE thermal covers surface appears to have changed from specular to opaque with many black dots of various sizes that appear to be impact or penetration craters. A large impact crater is clearly visible in the lower right quadrant of the thermal cover. Many of the craters appear to be encircled by a white halo. Numerous circular white discolorations that appear to be impact points are visible on the covers surface. The cover appears to be stretched more than in the prelaunch photograph and the locations of Velcro attach pads are apparent. The ground strap appears to be in place with no visible damage but appears to be a darker color. |
Date | |
Source | http://lisar.larc.nasa.gov/UTILS/info.cgi?id=EL-1994-00018 http://lisar.larc.nasa.gov/IMAGES/LARGE/EL-1994-00018.jpeg |
Author | NASA |
Licensing edit
Public domainPublic domainfalsefalse |
This file is in the public domain in the United States because it was solely created by NASA. NASA copyright policy states that "NASA material is not protected by copyright unless noted". (See Template:PD-USGov, NASA copyright policy page or JPL Image Use Policy.) | ||
Warnings:
|
File history
Click on a date/time to view the file as it appeared at that time.
Date/Time | Thumbnail | Dimensions | User | Comment | |
---|---|---|---|---|---|
current | 20:51, 4 September 2007 | 2,408 × 2,468 (698 KB) | Sanao (talk | contribs) | == Description == {{Information |Description=LDEF (Flight), AO178 : A High-Resolution Study of Ultra-heavy Cosmic-Ray Nuclei, Tray A10 The flight photograph of the Ultra Heavy Cosmic Ray Experiment (UHCRE) was taken while the LDEF was attached to the Orbi |
You cannot overwrite this file.
File usage on Commons
There are no pages that use this file.
File usage on other wikis
The following other wikis use this file:
Metadata
This file contains additional information such as Exif metadata which may have been added by the digital camera, scanner, or software program used to create or digitize it. If the file has been modified from its original state, some details such as the timestamp may not fully reflect those of the original file. The timestamp is only as accurate as the clock in the camera, and it may be completely wrong.
_error | 0 |
---|