Released Drawings of the PEP-II Window
| SW Window Assy: Window Final Assembly | SA-341-341-85 | |||||||
| Cold Test Machining | SA-341-341-12 | |||||||
| Brazement Assy | SA-341-341-14 | |||||||
| Metallized Ceramic Window | PF-341-341-31 | |||||||
| Ceramic (spacer) | PF-341-341-29 | |||||||
| Moly Plate | PF-341-341-28 | |||||||
| Moly Compression Ring | PF-341-341-27 | |||||||
| Ring Post Plating Machined | SA-341-341-11 | |||||||
| Ring Copper Plating | SA-341-341-53 | |||||||
| Ring Machining | SA-341-341-50 | |||||||
| Ring Brazement | SA-341-341-05 | |||||||
| Water Jacket | PF-341-341-21 | |||||||
| Inner Compression Ring | PF-341-341-20 | |||||||
Measurements and Brazing Instructions
The measurements to determine the braze gap and the size of braze wires to be used are made from the "Ring Post Plating Machined," and the "Metallized Ceramic Window." The measurements are recorded in the windowCalc.xls spread sheet. An example is shown below:
|
ss coefficient of expansion at 800C |
1.94E-05 |
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moly coefficient of expansion at 800C |
6.00E-06 |
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|
ceramic coefficient of expansion at 800C |
9.00E-06 |
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|
average 20°C dim |
MEASUREMENTS |
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|
MOLY OD |
15.006 |
15.0049 |
15.0057 |
15.0061 |
15.0055 |
|
|
MOLY ID |
11.629 |
11.6291 |
11.6290 |
11.6291 |
11.6292 |
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|
SS OD |
11.575 |
11.5750 |
11.5750 |
11.5750 |
11.5750 |
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|
PLATED SS ID |
9.764 |
9.7637 |
9.7638 |
9.7639 |
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|
|
CERAMIC OD |
9.753 |
9.7529 |
9.7529 |
9.7532 |
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|
Unplated ss ID |
9.815 |
9.8148 |
9.8147 |
9.8147 |
9.8147 |
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|
COPPER THICKNESS |
0.025 |
calculated |
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|
CERAMIC GAP |
0.005 |
calculated |
Gap Calculations |
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|
MOLY GAP |
0.027 |
calculated |
ID |
OD |
COLD brazeGAP |
|
|
SS THICKNESS |
0.886 |
calculated |
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|
MOLY THICKNESS |
1.688 |
calculated |
min |
9.7637 |
9.7529 |
0.0052 |
|
max |
9.7639 |
9.7532 |
0.0055 |
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|
ceramic height |
0.717 |
WESGO |
ID |
OD |
COLD
ss-mo GAP |
|
|
id of cooling channel |
10.500 |
design values |
min |
11.6290 |
11.5750 |
0.0270 |
|
od of cooling channel |
10.750 |
design values |
max |
11.6291 |
11.5750 |
0.0271 |
|
height of cooling channel |
0.500 |
design values |
TOTAL-GAP |
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|
SS location relative to moly |
0.200 |
design values |
min |
0.0323 |
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|
max |
0.0326 |
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|
Calc. total room temp gap= |
0.0325 |
0.0003 |
braze gap range |
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desired total gap .0327 |
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The .0327 total gap dimension is composed of the stainless steel to moly gap and the ceramic to stainless steel gap (called the COLD brazeGAP.)
a histogram of some actuals for the ceramic to stainless steel gap:
a histogram of some actuals for the stainless steel to moly gap:
a histogram of the gap total
(the outliers on the low side were early windows that brazed OK, toward the end of the run, they were more nearly .0327)
a histogram of the tolerance range of the gap total
The standard braze rings were qty 2, .050 diameter wires, and some braze paste
