2010/07/27
| 08:55 | Stop baking detector |
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| Fridge running status |
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| 09:33 | Fill N2 cold trap full |
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| Tune SQUID | |
| 11:24 | Zap SQUID |
| 13:22 | Flux is removed a little bit in sqA, zapping all three times in a row |
| 14:01 | sqA modulation depth 145mV, got a little bit improvement |
| Zapping squids again, see pressure on P1 rise when zapping the squids. The Tc of squids is ~9K, it may not a good idea to connect them to the still because it disturbs the fridge when zapping the squids above 9K (?). 4K stage may be better. |
| SQUID | Bias (uA) | Lock point (mV) | Modulation depth (mv) |
|---|---|---|---|
| A | 90 | 5.5 | 140 |
| B | 100 | 3.4 | 507 |
| C | 97 | 6.5 | 483 |
| D | 90 | 3.1 | 37 |
| Squid modulation curves |
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| 14:38 | SQUID D has a lot of flux trapped, zap it again |
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| 15:02 | Get 89mV on sqD, zap it again |
| 15:18 | Get 17mV on sqD, zap it again. |
| 15:54 | Can not lock squid on channel B and channel D, go back to DCRC v1 |
| 16:44 | See pulses on all channels of DCRC v1 |
| 16:45 | Flash the detector: LED1, 400uA, ON 100us, OFF 2500 us |
| 17:19 | Stop baking the detector |
| Take pulse data 07100727_1819_F0001 & 2 | |
| 19:48 | Fill N2 cold trap full |
| 21:11 | Take pulse data |
Series 07100727_2111 settings
| 22:35 | Stop taking data and start baking detector overnight |
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| Detector baking settings |
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