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File:Z-machine480.jpg

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Z-machine480.jpg (388 × 256 pixels, file size: 41 KB, MIME type: image/jpeg)

Photo by Randy Montoya (on behalf of US Government laboratory). Courtesy, Sandia National Laboratories.

To view a 2,400 × 1,586-pixel version (1.7 MB, hosted by Sandia National Laboratories), click here.

Alternatively a 3300 x 2180-pixel version is available (8.39 MB, uploaded by Sandia National Laboratories, [1]

Summary

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English: Z-pinch at Sandia National Laboratories Z machine. Due to the extremely high voltage, the power feeding equipment is submerged in concentric chambers of 540,000 gallons of transformer oil and 600,000 gallons of deionized water, which act as insulators. However, the electromagnetic pulse generated when discharging the electrical energy to fire the Z machine causes impressive lightning, referred to as “arcs and sparks,” which can be seen around all conducting materials in the room.
This particular digitally enhanced rendition of Sandia’s original press release image was uploaded by User:Greg L and was provided in order to preserve the original’s overall appearance at a reduced size of only 440 pixels horizontally. This was necessary due to the image’s extremely high contrast ratio at high spatial frequencies as well as the very dark shades in its upper corners.

Français : machine Z (ou Z-pinch) du Sandia National Laboratories. A cause du voltage extrêmement élevé, l'équipement d'alimentation de puissance est immergé dans des chambres concentriques de 2000 m³ d'huile de transformateur et 2300 m³ d'eau déminéralisée, qui agissent comme des isolants. Cependant, l'impulsion électromagnétique générée Lors de la décharge de l'énergie électrique produite par la machine Z foudre produits d'impressionnants arcs électriques et des étincelles pouvant être observés autour de tous les matériaux conducteurs de la "chambre".
Cette photo est une version améliorée d'une image originale du communiqué de presse de Sandia, envoyée par Utilisateur: Greg L qui préserve l'apparence générale de l'original à une taille réduite de seulement 440 pixels à l'horizontale. Ceci était nécessaire en raison d'un contraste très élevé de l'image (Cf. hautes fréquences) et de teintes très sombres dans ses angles supérieurs

Sandia National Laboratories does not freely license their images. Permission to use this image in Wikipedia articles had been granted by Neal Singer, Sandia National Laboratories’ Media Relations spokesperson, via e-mail to Brian0918, at 10:03AM EST on 14 March 2005 stated as follows: "hi Brian, encyclopedia articles are fine. We only require a credit in the form, 'Courtesy, Sandia National Laboratories,' thanks, Neal." Since 19 April 2005 however, Wikipedia policy is to not accept permission-only images. Accordingly...

Licensing

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Fair Use Rationale:

  • This Z machine image is available here only at a highly limited, Web-based resolution (440 pixels with no higher resolution available).
  • This image is a derivative of Sandia National Laboratories’ original press release image, as linked to from within their 8 March 2006 press release, and has less than 3.4% the number of pixels as the original.
  • As Sandia National Laboratories is a national laboratory and public access is restricted, freely available, alternative images of Z machine test shots are not readily available.
  • Although Sandia National Laboratories might possess other images showing the machine between shots, this particular image, which shows the Z machine during a shot, illustrates the enormous power required to achieve high temperatures.
  • The copyright holder’s claimed rights are preserved to the maximum available extent via attribution in the image’s caption (“Courtesy, Sandia National Laboratories”#.
  • This image is used in the article Z_Machine, as it is the topic of that article #the subject entity and its use). As a restricted-access facility, other images with comparable information and usefulness in this situation are unlikely to be available from sources other than Sandia, and therefore would have similar licensing. Also used at renovation of the nuclear weapon arsenal of the United States#Sandia which covers this too.

File history

Click on a date/time to view the file as it appeared at that time.

Date/TimeThumbnailDimensionsUserComment
current07:50, 23 December 2017Thumbnail for version as of 07:50, 23 December 2017388 × 256 (41 KB)Theo's Little Bot (talk | contribs)Reduce size of non-free image (BOT - disable)
14:54, 5 September 2008No thumbnail440 × 291 (276 KB)Greg L (talk | contribs)Uploaded again after 404 error linking to the image

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