Previous report concerning of the wire tension measurement (see WIRE
TENSION MEASUREMENT on the E614 Chamber Design and Performance Notes page)
showed large spread of tension from wire to wire. Additional test was
carried out to understand possibility to improve result.
	The follow procedure was used. Single 15 mkm wire was strung on the
winding table with 35 g weight and positioned on the proper grooves on the
both rulers and oscillation period was measured (fortunately, two ends of
winding equipment are separated electrically). No chamber was used for that
test. Length of the test wire equals to distance between two glass rulers
(65cm). After that wire was lifted on the one end (close to the applied
weight; wire had lost contacts with surfaces of the nearest stainless steel
screw and both glass rulers) using pulley and again positioned on the same
grooves. Oscillation period was measured for that case. Totally 30 wires
were strung on the two adjacent grooves.
	Result is shown on the attached figure. One can see wide tensions
distribution for initially positioned wires and narrow one after wires were
lifted. These results consistent with tension measurements of PPP. So we can
exclude/reduce influence of wire friction on the surfaces and get
approximately the same tension (at least) for all sense wires.


--------------------------------------------------------
Yuri Davydov (davydov@triumf.ca)        (604) 222-6222
TRIUMF  			   FAX  (604) 222-1074
4004 Wesbrook Mall
Vancouver,  BC
Canada   V6T 2A3

Description: Fig.1 , Filename: tn.ps

Created for the The Center for Subatomic Research E614 Project Projects Page.

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