Transcript Stringing 101 - Duke Atlas

Stringing 101
Chiho Wang
Duke University
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Chiho Wang
Duke University
Technical Training
May, 2001
Stringing Station
 What does the tension program do?
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High voltage test
 All wire must hold 1700 V
Measure wire tension
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135Hz (55.5g) < wire tension < 165Hz (83g)
Write a wire history file
 For future reference in case of
problem
 The following forms should be in
binder during stringing.
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Stringing rework.xls
Straw-wise anomaly.xls
Forms can be printed from construction room
PC heppc5 e:\heplab\forms
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Chiho Wang
Duke University
Technical Training
May, 2001
HV test
 General
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Both switches on HV power supply should be
up for operation
Current draw limit dial should be on 100uA
Tension plate should be grounded (if can not
ground tension plate, supervisor should be
contacted)
 When testing many wires (e.g. after stringing)
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Set HV duration to a long time
(e.g. 3000 sec)
Set straw number “ 0”
Record failed channel on log book and rework
sheet later for rework.
Use <Abort> to turn off HV
 When testing a single channel (e.g. during wire
rework)
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Set HV duration to 3 sec (default)
Set straw number to the straw being tested
Ground both ends of wire then run HV test
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Chiho Wang
Duke University
Technical Training
May, 2001
Stringing & Tension Measurement
 Pulling wire out of spool should be slow and
eyes on wire. Always minimal handling/contact of
wires
 Tension plate should be grounded.
 Always check that the straw number on screen is
the actual straw being worked on.
 If small or no peak, try “Low Scan” first
 Wire history should be entered in the order of
actions taken, and as complete as possible.
 e.g. repin, wire broke, wire removed,
restrung...
 Do not hesitate to make a “Other” comment
when you see something unusual.
 When skipping a straw, also write down straw #
and reason of skipping on rework sheet.
 Don’t try too hard before skipping a wire
during stringing process. Skip the wire before
feeling frustrated (~3 tries). String along and
keep yourself in good mood!
 Use a new rework sheet in every run of rework
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Chiho Wang
Duke University
Technical Training
May, 2001
About the Log file
 M#-*_StringLog_%.csv
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comma delimited (text/excel) file in
c:\users\tension\data or d:\…
# = module type (usually 2 or 3)
* = module number (01 - 35)
% = 1 or 2 for station number
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Chiho Wang
Duke University
Technical Training
May, 2001
About the Log file
 The final tension of a wire can be found in
M#-*_Accepted_%.csv or by finding last
“Accepted” in comment in log file
 In operation: make a “other” comment
when finishing one phase and going into
another phase e.g.
 end of stringing, start HV test
 rework after 16 ch tension test ..etc
 Enter operator initial in Alphabetical order
separated by “/” if >1 operator e.g. cw/eb
 Set straw # = 0 for any log irrelevant tests
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Chiho Wang
Duke University
Technical Training
May, 2001
Tension program
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Chiho Wang
Duke University
Technical Training
May, 2001