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Message ID: 1021     Entry time: Thu Oct 2 18:56:19 2008
Author: rana 
Type: Summary 
Category: SUS 
Subject: Resistivity of Suspension Wire 
Bob and Steve measured the resistance of the suspension wire today:
OD     = 0.0036" =  0.091 mm
Length = 46"     = 1168.4 mm
Resistance     =   33.3 Ohms

resistivity = R * pi * (OD/2)^2
              ----------------- = 1.85e-7 Ohm-meters
                  Length 


This was a batch of California Fine Wire from 2001 (same as used at LHO and LLO).

By comparison the standard tabulated resistivity for steels is (http://hypertextbook.com/facts/2006/UmranUgur.shtml):
                  resistivity (Ohm-meter x 10^-7)
-------------     ----------------
304 Stainless       7.2
316 Stainless       7.4
Cast Steel          1.6

This is all to see whether or not the 60 Hz fields produce forces on the suspension wires via coupling with the Earth's DC field.

TBD
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