On Mon, 03 Apr 2000 15:53:53 -0400, Jim Cline wrote:
>From Keith:
>The tube was a Siemens ceramic K FN Cu 2K, run at full power, with nominal
>focus 10 x 1 mm. It was run in vertical line mode with a takeoff angle of 6.
>The maximum count was 17,500 cps and lobes were observed at about 15 cps [as
>shown in figures he sent me]. The lobes were not symmetric [they span a
>detector Z range of -0.4 to +0.6mm with the central focal line from -0.15 to
>+0.15mm]. These lobes are lower than reported by Joerg Bergmann in
>www.bgmn.de/tubetails.html, but also the tube is a more modern design.
As I have added to www.bgmn.de/tubetails.html, the Siemens tube plotted
on this site is of K FL Cu 2K type and fresh manufactured. This is as modern
as Keiths tube, but long fine focus (nominal 12 x 0.4 mm). Lobes span a Z
range of -1.37 to +1.22mm at takeoff angle 6 deg, max intensity 7000 cps and
lobe intensity of 20 cps. This gives 6% integrated intensity within lobes.
J"org Bergmann, Dresden
[EMAIL PROTECTED]
