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Archived Messages for CLAS_DRIFT_CHAMBERS_1997@cebaf.gov: wire tension measurements

wire tension measurements

Richard Thompson (richardt@CEBAF.GOV)
Fri, 27 Jun 1997 16:40:21 -0400 (EDT)

It is, in my opinion, critical that we measure the tension on some wires
in the drift chambers before working on them. The motivation is clearly
to understand why wires in most chambers appear to have broken. For R1,
we have tried unsuccessfully to do this using the magnetic field of the
minitoroid, and we would like to try the main toroid. If this also fails
(which I believe it will) we can use a small coil magnet inserted into R1.

I believe Sebastian has already demonstrated that it is possible to use
the main toroid field to measure R2 wire tensions. So I propose one day
after the run to measure some R2 wire tensions with the main torus (and
try it for R1). The minitoroid, target, and beam line can be in place.

Immediately prior to the extraction of R1, we will measure wire tensions
with the small coil.

\ R A Thompson /
/ Dept of Physics and Astronomy University of Pittsburgh \
\ Pittsburgh, PA 15260 /
/ richardt@cebaf.gov 757-269-7475 \