2012/08/17
| 0230 | Mixing chamber temperature appears to have reached a minimum of 109 mK. |
|---|---|
| 0415 | Complete test to see effect of still heater on mixture pressures and mixing chamber temperature. Readings were taken half-an-hour after still heater was powered to value shown in left-hand column: |
| Still Heater [mW] | G1 [mbar] | G2 [mbar] | P1 [mbar] | Mixing Chamber Temperature [mK] |
|---|---|---|---|---|
| 0.0 | 96 | 96 | 0.12 | 109 |
| 2.5 | 116 | 115 | 0.16 | 117 |
| 5.0 | 131 | 130 | 0.19 | 124 |
| 7.5 | 144 | 143 | 0.22 | 130 |
| 10.0 | 158 | 156 | 0.24 | 133 |
| 0504 | Start single shot test. |
|---|---|
| 0510 | Fill N2 cold trap full. |
| 0945 | Fed Cricket 3 pellets. |
| 1015 | Fill LN2 cold trap full. |
| 1120 | Began LHe Transfer (-0.1%) |
| 1200 | Began LHe Transfer (95.0%) |
| Still Heater [mW] | G1 [mbar] | G2 [mbar] | P1 [mbar] | Mixing Chamber Temperature [mK] | Cold Plate Thermometer [kΩ] | Still Thermometer [kΩ] |
|---|---|---|---|---|---|---|
| 0.0 | 110 | 109 | 0.11 | 108 | 16.4 | 4.50 |
| 2.5 | 132 | 131 | 0.12 | 114 | 15.5 | 4.38 |
| 5.0 | 149 | 147 | 0.15 | 120 | 15.1 | 4.35 |
| 7.5 | 166 | 164 | 0.17 | 126 | 14.9 | 4.30 |
| 10.0 | 183 | 179 | 0.20 | 130 | 15.0 | 4.25 |
| 2107 | Start single shot test. Closed condenser speedivalve, V13A, opened V9. |
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| G2 increasing rate: 2.5 mbar/ min |