Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Adaptation of the Bridgman anvil cell to liquid pressure mediums   The advantage of Bridgman anvil pressure cells is their wide pressure range
and the large number of wires which can be introduced into the pressure
chamber. In these pressure cells soft solid pressure mediums like steatite are
used. We have succeeded in adapting the Bridgman cell to liquid pressure
mediums. With this breakthrough it is now possible to measure in very good
hydrostatic pressure conditions up to 7 GPa, which is about twice the pressure
attainable in piston-cylinder cells. The pressure gradient in the cell,
estimated from the superconducting transition width of lead, is reduced by a
factor of five in the liquid medium with respect to steatite. By the use of
non-magnetic materials for the anvils and the clamp and due to the small
dimensions of the latter, our device is specially suitable for
magneto-transport measurements in dilution fridges. This pressure cell has been
developed to measure very fragile and brittle samples like organic conductors.
Resistivity measurements of (TMTTF)2BF4 performed in a solid and liquid
pressure medium demonstrate the necessity of hydrostatic pressure conditions
for the study of organic conductors at high pressures.

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The categories of this paper are: eess
32
The categories of this paper are: atom-ph
12
The categories of this paper are: nucl-th
37
The categories of this paper are: supr-con
13
The categories of this paper are: quant-ph
8
The categories of this paper are: hep-ex
10
The categories of this paper are: q-bio
26
The categories of this paper are: bayes-an
9
The categories of this paper are: nlin
6
The categories of this paper are: astro-ph
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The categories of this paper are: acc-phys
33
The categories of this paper are: plasm-ph
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The categories of this paper are: funct-an
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The categories of this paper are: cs
30
The categories of this paper are: q-alg
3
The categories of this paper are: physics