File:Z-machine480.jpg

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, 

Summary
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
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 which covers this too.