| Line 1 was replaced by line 1 |
| - !Tantalum Furnace |
| + !!Tantalum Furnace |
| Line 6 was replaced by line 6 |
| - !Current Issues |
| + !Heater power table |
| Lines 8-11 were replaced by lines 8-20 |
| - The material of the heater element and the radiation shield will be exchanged |
| - by niobium. The reason is, that niobium seems to have some better properties, |
| - and that the furnace [FI] uses also niobium and therefore the purchase of |
| - materials will be easier. ''Anyhow, the furnace is operational''. |
| + ||T\\[[K] ||heater power\\[[W]||U(prim)\\[[V]||I(prim)\\[[A]||I(2nd)\\[[A]||T(wall)\\[[K]||cooling rate\\[[K/min] |
| + |1400|2730|152|17.8|4 x 70.4|350 | |
| + |1300|2060|130|15.8|4 x 57 |330 | |
| + |1200|1500|110|14.1|4 x 46 |320 | |
| + |1100|1050| 88|12.5|4 x 37.5|310 | |
| + |1000| 730| 70|10.8|4 x 29.8|303 | > 50 |
| + | 900| 480| 58| 9.0|4 x 23.3|298 | 50 |
| + | 800| 325| 50| 7.5|4 x 18.0|293 | 30 |
| + | 700| 195| | | |291 | 17 |
| + | 600| 120| | | |290 | 10 |
| + | 500| 74| | | |289 | 4 |
| + | 450| 53| | | |289 | 3 |
| + | 400| 38| | |4 x 4.7|289 |1.5 |
| At line 12 added 5 lines. |
| + Temperature of the connections at 1400 K: 90-100 deg Celsius |
| + |
| + __The furnace must not be vented above 373 K.__ |
| + Cool down from 1400 K takes about 90 min, from 500 K still 60 min! |
| + |
| At line 13 added 9 lines. |
| + |
| + [TantalumFurnace.png] |
| + |
| + ''Sketch of tantalum furnace (not to scale)'' |
| + |
| + |
| + Connection of Furnace: |
| + |
| + [FT_conn1.png] [FTconn2.png] |
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