Figure 2.

Fused quartz aluminum-point cell with Inconel casing (Type 2 cell).

A. Connection to high vacuum, purified argon gas source, and manometer (see fig. 5).

B. Fused quartz-to-Kover graded seal.

C. Fused quartz connecting tube (7.4 mm o.d. × 1 mm wall), outer surface matte finished to minimize radiation piping.

D. Thermometer guide tube (Inconel, 7.94 mm o.d. × 0.13 mm wall).

E. Heat shunts (Inconel disks).

F. Insulation, cut from Fiberfrax blanket.

G. Fused quartz outer envelope (48 o.d. × 1.5 mm wall).

H. Graphite lid.

I. Graphite thermometer well.

J. Fused quartz thermometer well (precision bore (7.94 mm i.d.) and continuous with the outer envelope).

K. Fused quartz fiber, woven tape for cushioning.

L. Aluminum sample.

M. Graphite crucible.

N. Fused quartz fiber pad for cushioning the thermometer.

O. Fiberfrax paper liner.