| | Setup: iZIP mode, DIB1/2/3 → cables → 3.2 MHz filters → DCRC55/33/50 |
| | Taking Y-Be data overnight, last flash ~ 7:20. Biases accidentally left at 0 V for last night's data. |
| 0905 | Tower/MC(H35)/MC sensor/Cold Plate = 31.8/28.3/44/167 mK, Still = 1.26 K / 0.09 mbar, G1/G2 = 125/125 mbar, 1K Pot = 1.53 K / 2.6 mbar, Main bath = 69.6% |
| 0905 | Tweak 1K Pot needle valve open additional ~5-10 degrees. |
| 0910 | Fill LN2 cold trap Dewar. |
| 1020 | Check phonons, all seem OK |
| 1024 | Start test background series with standard setup at 0/0 V with FG=5/2/5, OG=3, with 1000 initial randoms, 0 ending randoms, no flash. Trigger on DIB1 phA with threshold of 20ADC bins and DIB1 qInner&qOuter each with threshold 210 ADC bins, with 150 us pileup cut window. Stop after initial randoms are done. |
| 1035 | Remove D-sub filter from DIB 3. First turned off MIDAS programs. Repowered DCRC and set up timing link. Restart MIDAS and zap SQUIDs. |
| 1050 | Check phonons, see 70 Hz sinusoid. Something wrong with timing link maybe, or stray test signal. Redoing timing link doesn't help. |
| 1055 | Power cycle DCRC50(DIB3). |
| 1100 | Sinusoid still present in DIB1 phonons. Try timing link once more. Doesn't help. |
| 1105 | Power cycle DCRC33(DIB2), which I accidentally power cycled earlier. Reestablish timing link. Sinusoid still present in DIB1 phonons. |
| 1110 | On advice from David (who is home sick today), did rd 3d on the DCRCs. Expect 09D7, indicating test signal off. This was true for DIB1 but not for DIB2 or DIB3, which read 0DD7, indicating test signal on. Did wr 3d 09D7 to both DIB2 and DIB3. However, sinusoid still present in DIB1 phonons. |
| 1125 | Power cycle all three boards. Start boards, find that 3d is 0DD7 on all three, change to 09D7. Reestablish timing link. Zap SQUIDs. |
| 1140 | Check phonons again, sinusoid still present, seen in DIB1 and DIB3 (all DIB2 railed). |
| 1150 | Don't know what to do. Powering down DCRCs for the time being. |
| 1206 | During current power cycling add Pi filter back on to Dib3 DCRC50, and power boards back on. Reestablish timing link and ZAP SQUIDs. |
| 1230 | No sinusoid seen on any phonon channels. Just to check, did wr 3d to all board telnet sessions. DCRC1 returned 09D7, DCRC2 and DCRC3 returned 0DD7. |
| 1259 | (Bad Trace lengths) Start test background series with standard setup at 0/0 V with FG=5/2/5, OG=3, with 1000 initial randoms, 0 ending randoms, no flash. Trigger on DIB1 phA with threshold of 20ADC bins and DIB1 qInner&qOuter each with threshold 210 ADC bins, with 150 us pileup cut window. Stop after initial randoms are done. |
| 1305 | Remove D-sub filter from DIB 3. First turned off MIDAS programs. Repowered DCRC. Restart MIDAS programs and zap SQUIDs. Set up timing link. |
| 1320 | DCRC1 PC railed. Changed offset from 0.12 V to -0.12 V. Otherwise all phonons look good. |
| 1325 | (Bad Trace lengths) Start test background series with DIB3 unfiltered at 0/0 V with FG=5/2/5, OG=3, with 1000 initial randoms, 0 ending randoms, no flash. Trigger on DIB1 phA with threshold of 20ADC bins and DIB1 qInner&qOuter each with threshold 210 ADC bins, with 150 us pileup cut window. Stop after initial randoms are done. |
| 1330 | Add FilterBoard(all filters off) to DIB3. First turned off MIDAS programs. Repowered DCRC. Restart MIDAS programs and zap SQUIDs. Set up timing link. |
| 1352 | DCRC3 PA railed. Changed offset to -0.15 V. |
| 1406 | Start test background series with pi-filter board on DIB3 with all switches off at 0/0 V with FG=5/2/5, OG=3, with 1000 initial randoms, 0 ending randoms, no flash. Trigger on DIB1 phA with threshold of 20ADC bins and DIB1 qInner&qOuter each with threshold 210 ADC bins, with 150 us pileup cut window. Stop after initial randoms are done. |
| 1418 | Switch on all FilterBoard lines. First turned off MIDAS programs. Repowered DCRC. Restart MIDAS programs and zap SQUIDs. Set up timing link. |
| 1435 | DCRC3 PA was railed. Tried correcting it by changing polarity to 0 (feedback disable) and then back to 1 (non-inverting). Could see no effect in Squid tuning. After a while, figured out that triggerfe2 had crashed. Restarted triggerfe2. Tried changing polarity again with no change in DCRC3 PA. |
| 1450 | Changed DCRC PA offset to +0.08 V |
| 1452 | Start test background series with pi-filter board on DIB3 with all switches on at 0/0 V with FG=5/2/5, OG=3, with 1000 initial randoms, 0 ending randoms, no flash. Trigger on DIB1 phA with threshold of 20ADC bins and DIB1 qInner&qOuter each with threshold 210 ADC bins, with 150 us pileup cut window. Stop after initial randoms are done. |
| 1459 | Replace Filterboard with standard Pi Filter on DIB3 (i.e. we're back in Standard Mode). First turned off MIDAS programs. Repowered DCRC. Set up timing link. Restart MIDAS programs and zap SQUIDs. |
| 1645 | 1K Pot pressure down to 5.5 mbar (1.62 K), tweak needle valve open additional 5 degrees. |
| 1655 | Fill LN2 cold trap Dewar |
| 1700 | Start 15 hours of 30min Y-Be series at -4/+4 V with FG=5/2/5, OG=3, with 1000 initial randoms, 1000 ending randoms, with 30s flash and 25 minute cooldown in between series. Trigger on DIB1 phA with threshold of 20ADC bins and DIB1 qInner&qOuter each with threshold 210 ADC bins, with 150 us pileup cut window. |
| 1725 | Place Y source in shielding. |