Update on the Window thickness measurement - MICE

jabgoldfishΤεχνίτη Νοημοσύνη και Ρομποτική

19 Οκτ 2013 (πριν από 4 χρόνια και 20 μέρες)

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May 5, 2005

AFC Module Meeting

AFC Window Measurements

Page
1

Window Measurement Summary


Non
-
contact Vision machine measurements of
good window complete at LBNL


Data has been analyzed and results sent to
Wing Lau


Window sent to U. Miss. for alternate
measurement technique


Data from all measurements to be compared
upon completion

May 5, 2005

AFC Module Meeting

AFC Window Measurements

Page
2

Vision Machine Measurement

Damaged AFC module window being measured on Vision machine

May 5, 2005

AFC Module Meeting

AFC Window Measurements

Page
3

Measurement Description


Good window profile measured on both sides using
non
-
contact Vision machine


Measurements taken along 24 radial sections
spaced at 15 degrees apart


Both a medium and a high magnification lens used


High magnification data found to be better


Data taken in 1 mm radial increments from 0
-
84 mm


Radial extent limited by lens interference with
window frame

May 5, 2005

AFC Module Meeting

AFC Window Measurements

Page
4

Results Summary


Data was analyzed for asymmetry and average
thickness


Comparison to the window design profile was
carried out


Measurement accuracy affected by window slope


Scatter in thickness results caused by subtraction of
two profile measurements


Any apparent asymmetry could be actual or caused
by misalignment of two separate reference systems

May 5, 2005

AFC Module Meeting

AFC Window Measurements

Page
5

U. Miss. Measurements


Light
-
contact measurement method previously
developed for determining center thickness


Original micrometer fixture touches window on
opposite surfaces at window center


Initial contact determined by electrical continuity


Fixture is being adapted to hold window at an angle
for off
-
center measurements


Measurements to be made in 25 mm radial
increments spaced every 90 deg circumferentially