C91CCA21-41CF-4445-8A23-D6BE5F036E27@uregina.ca">Hello Tim:
this is a good point to bring up again. We will soon begin
studies of a pre-radiator in front of the BCAL to compensate for the
potential loss of radiation thickness should we change the lead sheet
thickness, in order to have a larger volume of fibers and thus collect
more light. As was discussed during the BCAL Mini Overview last
Friday, this does not impact you folks, as all changes will be
contained within the BCAL volume, with the exception of the innermost
layer. In the past we simulated Tungsten there. Do you see any
difficulties in using it instead of stainless steel? I understand that
it is somewhat difficult to machine for fiber grooves and bolt threads,
but I believe it is doable. Any comments?
From Wikipedia: :-)
"Pure tungsten is steel-gray to tin-white and is a hard metal.
Tungsten can be cut with a hacksaw when it is very pure (it is brittle
and hard to work when impure) and is otherwise worked by forging,
drawing, extruding, or sintering. Of all metals at temperatures above
1650 °C (3000 °F), this element has the highest melting point (3422 °C)
(6192 °F), lowest vapor pressure and the highest tensile strength.
Tungsten has the lowest coefficient of thermal expansion of any pure
metal. Its corrosion resistance is excellent and it can be attacked
only slightly by most mineral acids. Tungsten metal forms a protective
oxide when exposed to air but can be oxidized at high temperature.
Steel alloyed with small quantities of tungsten greatly increases its
toughness."
As far as the thickness this will come from the simulations. We
have a target date of January 15th for this, according to the BCAL
Action Tracker:
Cheers for now, Zisis...
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Department of Physics | tel. : (306) 585-5379
University of Regina | tel. : (306) 585-4149
Regina, SK S4S 0A2 | fax. : (306) 585-5659