Previous Day
| | Setup: DIB1/3/4 → 3.2 MHz filters → cables1/2/3 → DCRC55(1)/33(2)/50(3) |
| | Overnight data: DCRC1 pB railed 18 minutes into the 1201_1732 series. Otherwise data looked OK. |
| 0800 | Tower/MC/Coldplate = 33.1/36.0/221 mK, Still = 1.3 K / 110 μbar, G1/G2 = 190/170 mbar, 1K Pot = 1.70 K / 28 mbar. MB = 65.5%.
Boil off rate: . |
| 0805 | Fill LN2 cold trap bath |
| 0815 | Perform supermini IbIs: |
| channel | QET bias | Vbias-V300 | driver gain | New value |
| DCRC1 pA | 182 | 0.283 | x2 | 0.264 |
| DCRC1 pB | 185 | 0.1095 | x2 | -0.7835 |
| DCRC1 pC | 185 | 0.5765 | x2 | 0.595 |
| DCRC1 pD | 190 | -0.0776 | x2 | -0.085 |
| | | | | |
| DCRC2 pB | -174 | -0.8042 | x1 | 0.443 |
| DCRC2 pC | -173 | 0.1193 | x1 | 0.1165 |
| | | | | |
| DCRC3 pB | 207 | 0.005 | x2 | -0.007 |
| DCRC3 pC | 165 | 0.0735 | x2 | 0.0615 |
| DCRC3 pD | 202 | -0.162 | x2 | -0.17 |
| 0835 | Start a sequence of 1-hour series of 0V data with Frontend Gain = 5/2/5, OG = 8/3/8, with 1000 beginning randoms, with no flashing in between series, and a 45ADC bin threshold trigger on DCRC3 pD. Left the sequencer set to 12 series but I will stop it early. |
| 1117 | Stop data taking to repeat supermini IbIs. |
| channel | QET bias | Vbias-V300 | driver gain | New value |
| DCRC1 pA | 182 | 0.283 | x2 | 0.2778 |
| DCRC1 pB | 185 | 0.1095 | x2 | -0.7498 |
| DCRC1 pC | 185 | 0.5765 | x2 | 0.6153 |
| DCRC1 pD | 190 | -0.0776 | x2 | -0.068 |
| | | | | |
| DCRC2 pB | -174 | -0.8042 | x1 | - |
| DCRC2 pC | -173 | 0.1193 | x1 | 0.1447 |
| | | | | |
| DCRC3 pB | 207 | 0.005 | x2 | 0.0043 |
| DCRC3 pC | 165 | 0.0735 | x2 | 0.078 |
| DCRC3 pD | 202 | -0.162 | x2 | -0.1638 |
| 1420 | Looking for a different set of higher QET bias points for all the channels. Using the Nov 29-30 IbIs curves to help locate the range of strong 10kHz oscillations - they seem to show up in the same place. Mostly trying to find points above this oscillatory region (current points are all below), and verify that there are still reasonable looking pulses.
One interesting observation - when 10kHz was very strong in DCRC3 pD, it was also appearing as pickup in DCRC3 pC, but not in pD. |
| channel | old QET bias | old prefactor | new QET bias | new prefactor | notes |
| DCRC1 pA | 182 | 0.2865 | 194 | 0.4511 | above oscillation range |
| DCRC1 pB | 185 | 0.2172 | 185 | 0.2172 | same |
| DCRC1 pC | 185 | 0.2211 | 191 | 0.3426 | above oscillation range |
| DCRC1 pD | 190 | 0.1992 | 197 | 0.3231 | below oscillation range |
| | | | | | |
| DCRC2 pB | -174 | 0.1647 | -174 | 0.1647 | same |
| DCRC2 pC | -173 | 0.1588 | -177 | 0.2673 | above oscillation range |
| | | | | | |
| DCRC3 pB | 207 | 0.1942 | 220 | 0.3958 | above oscillation range |
| DCRC3 pC | 165 | 0.3211 | 185 | 0.5269 | above oscillation range |
| DCRC3 pD | 202 | 0.1855 | 205 | 0.2501 | below oscillation range |
Prefactors calculated using interpolations of Nov 29-30 IbIs curves
using adjusted voltage offsets |
The new prefactors are on average 1.5 times higher, ranging from 1 to 2 times higher.
| 1500 | Adjust driver offsets, all channels look OK |
| 1511 | Start a sequence of 1-hour series of 0V data with Frontend Gain = 5/2/5, OG = 8/3/8, with 1000 beginning randoms, with no flashing in between series, and a 35ADC bin threshold trigger on DCRC3 pD. Left the sequencer set to 12 series but I may stop it early. |
| | looks like I forgot to set the initial randoms. Apparently no in-run randoms either.
DCRC3pD railed 13 minutes into the _2312 series. So the first 8 series are good. |
| 1515 | Main bath = 54.8% |
| 1605 | Fill LN2 cold trap bath |
Nominal end-of-run plan: finish next week, warm up over weekend
| Monday | analyze PCE data, maybe take more data |
| Tuesday | switch to HV, make IbIs curves, choose biases |
| Wednesday | take HV data (during day) |
| Thursday | take HV data (during day) |
| Friday | take HV data, measure breakdown |
Fun Luke gains to shoot for:
| Luke gain | HV at detector |
| 10 | 27 V |
| 20 | 57 V |
| 30 | 87 V |
Next Day