<s>
The	O
Berne	O
Infinitesimal	O
Bubble	B-Algorithm
Chamber	I-Algorithm
,	O
BIBC	B-Algorithm
,	O
was	O
almost	O
pocket	O
size	O
,	O
6.5	O
centimetres	O
across	O
and	O
with	O
a	O
visible	O
volume	O
containing	O
about	O
a	O
wine	O
glass	O
of	O
heavy	O
liquid	O
.	O
</s>
<s>
Bubble	B-Algorithm
chambers	I-Algorithm
are	O
similar	O
to	O
cloud	O
chambers	O
,	O
both	O
in	O
application	O
and	O
in	O
basic	O
principle	O
.	O
</s>
<s>
As	O
particles	O
enter	O
the	O
chamber	O
,	O
a	O
piston	B-Device
suddenly	O
decreases	O
its	O
pressure	O
,	O
and	O
the	O
liquid	O
enters	O
into	O
a	O
superheated	O
,	O
metastable	O
phase	O
.	O
</s>
<s>
The	O
BIBC	B-Algorithm
chamber	O
body	O
was	O
machined	O
from	O
a	O
block	O
of	O
aluminium	O
.	O
</s>
<s>
The	O
chamber	O
was	O
designed	O
to	O
look	O
for	O
charmed	O
particles	O
,	O
which	O
are	O
so	O
un-stable	O
that	O
they	O
usually	O
decay	O
too	O
quickly	O
to	O
give	O
big	O
bubble	B-Algorithm
chambers	I-Algorithm
a	O
good	O
chance	O
of	O
catching	O
them	O
.	O
</s>
<s>
BIBC	B-Algorithm
was	O
used	O
at	O
the	O
CERN	O
SPS	O
in	O
the	O
experiment	O
NA18	O
as	O
vertex	O
detector	O
together	O
with	O
a	O
downstream	O
2	O
m	O
streamer	O
chamber	O
of	O
the	O
MPI-Munich	O
which	O
allowed	O
for	O
momentum	O
analysis	O
of	O
the	O
charged	O
particles	O
.	O
</s>
