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Table of Contents

2009/12/09

Run diary

time Task
09:40 Fill N2 cold trap. MC T = 35.7 mK.
11:16 Fridge temperature changed during flashing. Flashing worked. Take LED1 voltage waveform run001.
11:56 Unplug DCRC and solder a wire to LED2 pin. Replug it. Take LED 2 and 1 voltage run002 and 003. Fridge temperature changes during flashing.
12:48 MC temperature plateaus at 73.6 mK. The LEDs might be heating the fridge. Set charge and phonon channels all to zero.
13:02 No sign of cooling. The LEDs are heating the fridge.
13:24 Start flashing using LED 1 only. ON 100us, OFF 2560 us.
19:53 Fill N2, He. MC T = 160.6 mK while LED1 flashing. LED2 has an DC offset -743 mV.
run001
run002 and 003

Data List

Time Run # Comment
11:03 1 LED1 flashing voltage. ON 100us, OFF 800us.
11:51 2 LED2 flashing voltage. ON 100us, OFF 800us.
3 LED1 flashing voltage. ON 100us, OFF 800us.