| | Setup: DIB1/3/4 → 3.2 MHz filters 3/1/2 → cable 3/1/2 →gender changer 3/1/2 → HVConn 1/3/2 → HV 1/2 → DCRC55/DCRC33 |
| 0835 | Tower/MC/Coldplate = 33.0/29.5/190 mK, Still = 1.2 K / 0.110 mbar, G1/G2 = 220/205 mbar, 1K Pot = 1.665 K / 20.0 mbar. Main Bath = 71.8% |
| 0835 | HV = 30.26 V, Vtest = 1.48 mV → Vdetector = 29.7 V |
| 0850 | Check the falloff currents in all channels. All are within 0.1 or 0.2 uA of the standard values (May 24 table) except DCRC2pD/Side1pF, which is 0.4 uA higher, implying lower Pparasitic than average |
| 0855 | Dial HV down to zero, short HV leads |
| 0900 | Fill LN2 cold trap bath. |
| 0905 | Begin 30 minute detector bake using DCRCs 1&2 |
| 1057 | Set up to take noise data on DIB2. Remove HV board. |
| 1106 | Setup: DIB3 → 3.2 MHz filters 1 → cable 1 →gender changer 1 → DCRC55 We need to tune DIB3 PD's SQUIDs, and DCRC55 has working test signals. |
| 1117 | Zap DIB3 SQUIDS |
| 1125 | Set DCRC1(55) as timing master. Apply DIB3 PA-PC SQUID settings from Feb 8. to DCRC1(55) |
| 1131 | Am able to see pulses easily on PB,PC. PA seemed to be open in the past. PD is the deliberately open channel which we haven't looked at yet. Let's tune it's SQUID. |
| 1145 | Choose SQUID bias of -63.6 uA for DIB3 pD. Nominal lockpoint is -1.4 mV, but we'll run through a range from -2.0 mV to -0.5 mV |
| 1148 | We'll want to know the SQUID responsivity (modulation curve slope) at each of the lockpoints chosen. The easiest way I can think to get that is to save some traces at each setting and calculate it offline. |
| 1150 | Write a few seconds of DIB3PD modulation curve data with Test signal = 50 mVpp/100 Hz, SQUID bias/lockpoint = -63.6 uA/-0.5 mV, FE/Driver Gain = 15/1 |
| 1153 | Write a few seconds of DIB3PD modulation curve data with Test signal = 50 mVpp/100 Hz, SQUID bias/lockpoint = -63.6 uA/-1.0 mV, FE/Driver Gain = 15/1 |
| 1154 | Write a few seconds of DIB3PD modulation curve data with Test signal = 50 mVpp/100 Hz, SQUID bias/lockpoint = -63.6 uA/-1.5 mV, FE/Driver Gain = 15/1 |
| 1155 | Write a few seconds of DIB3PD modulation curve data with Test signal = 50 mVpp/100 Hz, SQUID bias/lockpoint = -63.6 uA/-2.0 mV, FE/Driver Gain = 15/1 |
| 1156 | Write a few seconds of DIB3PD modulation curve data with Test signal = 50 mVpp/100 Hz, SQUID bias/lockpoint = -63.6 uA/-1.4 mV, FE/Driver Gain = 15/1 |
| | Plan: Get data with PA/PD lockpoints = -0.5, -1, nominal, -1.5, -2 and with PB/PC = sc, norm, trans. But these two things can overlap. |
| 1214 | Start 30 min 0V long trace random data set with 26.2144ms trace length, Frontend Gain = 15, OG = 4, PA/PD lockpoint = -0.5/-0.5 mV, PB/PC QET bias = 0/0 = SC/SC ,20Hz in-run randoms with no starting/ending randoms. |
| 1232 | Abort run Saved raw data in this 1DCRC mode is crashing Batviewer. Unsure what's wrong. |
| 1240 | Power up DCRC2 with miniBOB attached and attach timing link cable. Set DCRC2 as master and DCRC1 as slave in ODB. This seems to work, saved data is readable again! Let's re-take the above data to be sure we've got it. |
| | Let's also get PA's mod curve since we'll be using a variety of lockpoints. |
| 1256 | Write a few seconds of DIB3PD modulation curve data with Test signal = 50 mVpp/100 Hz, PA/PD SQUID bias = -54/-63.6 uA, PA/PD lockpoint = -0.8/-0.3 mV, FE/Driver Gain = 15/1, PA/PD = pre-amp,open loop |
| 1257 | Write a few seconds of DIB3PD modulation curve data with Test signal = 50 mVpp/100 Hz, PA/PD SQUID bias = -54/-63.6 uA, PA/PD lockpoint = -1.2/-0.7 mV, FE/Driver Gain = 15/1, PA/PD = pre-amp,open loop |
| 1258 | Write a few seconds of DIB3PD modulation curve data with Test signal = 50 mVpp/100 Hz, PA/PD SQUID bias = -54/-63.6 uA, PA/PD lockpoint = -1.8/-1.4 mV, FE/Driver Gain = 15/1, PA/PD = pre-amp,open loop |
| 1259 | Write a few seconds of DIB3PD modulation curve data with Test signal = 50 mVpp/100 Hz, PA/PD SQUID bias = -54/-63.6 uA, PA/PD lockpoint = -2.0/-1.7 mV, FE/Driver Gain = 15/1, PA/PD = pre-amp,open loop |
| 1300 | Write a few seconds of DIB3PD modulation curve data with Test signal = 50 mVpp/100 Hz, PA/PD SQUID bias = -54/-63.6 uA, PA/PD lockpoint = -2.4/-2.0 mV, FE/Driver Gain = 15/1, PA/PD = pre-amp,open loop |
| | Revised Plan: Get data with PA/PD lockpoints = settings just measured and PB/PC = sc, norm, trans. But these two things can overlap. |
| 1305 | Start 30 min 0V long trace random data set with 26.2144ms trace length, Frontend Gain = 15, OG = 4, PA/PD SQUID bias = -54/-63.6 uA, PA/PD lockpoint = -0.8/-0.3 mV, PB/PC QET bias = 0/0 = SC/SC ,20Hz in-run randoms with no starting/ending randoms. |
| 1333 | Tower = 33.3 mK |
| 1351 | Start 30 min 0V long trace random data set with 26.2144ms trace length, Frontend Gain = 15, OG = 4, PA/PD SQUID bias = -54/-63.6 uA, PA/PD lockpoint = -1.2/-0.7 mV, PB/PC QET bias = 300/300 = Norm/Norm, 20Hz in-run randoms with no starting/ending randoms. |
| 1438 | Start 30 min 0V long trace random data set with 26.2144ms trace length, Frontend Gain = 15, OG = 4, PA/PD SQUID bias = -54/-63.6 uA, PA/PD lockpoint = -1.8/-1.4 mV, PB/PC QET bias = 145/145 = Trans/Trans, 20Hz in-run randoms with no starting/ending randoms. |
| 1509 | Start 30 min 0V long trace random data set with 26.2144ms trace length, Frontend Gain = 15, OG = 4, PA/PD SQUID bias = -54/-63.6 uA, PA/PD lockpoint = -2.0/-1.7 mV, PB/PC QET bias = 120/120 = Trans/Trans, 20Hz in-run randoms with no starting/ending randoms. |
| 1543 | Start 30 min 0V long trace random data set with 26.2144ms trace length, Frontend Gain = 15, OG = 4, PA/PD SQUID bias = -54/-63.6 uA, PA/PD lockpoint = -2.4/-2.0 mV, PB/PC QET bias = 120/120 = Trans/Trans, 20Hz in-run randoms with no starting/ending randoms. |
| 1618 | PD railed after a few minutes in this last dataset, but there should be enough to work with there. |
| 1627 | Playing with FEG and looking at PSD on pulse viewer. It looks like PSD shape is invariant to FEG for FEG > 10 or so. Below this, there starts to be structure around 100kHz that changes with FEG. |
| 1630 | Remove Na-22 source from safe and place near HPGe detector |
| 1631 | Start 30 min 0V long trace random data set with 26.2144ms trace length, Frontend Gain = 10, OG = 4, PA/PD SQUID bias = -54/-63.6 uA, PA/PD lockpoint = -2.4/-2.0 mV, PB/PC QET bias = 120/120 = Trans/Trans, 20Hz in-run randoms with no starting/ending randoms. |
| 1700 | Take out Y-88 source from the safe and place near HPGe detector for HPGe resolution studies. |
| | Fill cold trap full. |
| 1709 | Take out Ba-133 source from the safe and place near HPGe detector for HPGe resolution studies. |
| 1712 | Start 30 min 0V long trace random data set with 26.2144ms trace length, Frontend Gain = 10, OG = 4, PA/PD SQUID bias = -54/-63.6 uA, PA/PD lockpoint = -1.8/-1.4 mV, PB/PC QET bias = 120/120 = Trans/Trans, 20Hz in-run randoms with no starting/ending randoms. |