Table of Contents
Run 77 Summary
Run preparation
S104 detector
All phonon channels were working in Run76. Update: Feedback A and SQUID D not working after we pump down the IVC. Decided to proceed with the cooldown.
Run Setup
Accessory wiring
| Run 77 accessory wiring | ||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| accessory | Motor Y1 | Motor Y2 | Motor Y3 | Motor Y4 | Thermometer Pin1 | Thermometer Pin2 | Thermometer Pin3 | Thermometer Pin4 | ||||||||
| acc wire | SL Yconnector | SL ROX connector | purple | purple | ||||||||||||
| Tower F4 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 |
| interposer conns | brn | w brn | org | w org | blu | w blu | grn | blk | blk | pur | pur | |||||
| no soc | no soc | no soc | no soc | no soc | no soc | no soc | no soc | no soc | ||||||||
| stripline pin | 49 | 50 | 8 | 9 | 11 | 12 | 13 | 45 | 2 | 46 | ||||||
| label | pBr3 | pBr4 | pCr3 | pCr4 | pAr3 | pAr4 | pAr5 | pDr3 | pAr1 | pDr4 | ||||||
| STRIPLINE 41 | ||||||||||||||||
| CABLE #2 | ||||||||||||||||
| stripline D50 | 36 | 18 | 8 | 23 | 4 | 19 | 1 | 41 | 17 | 40 | ||||||
| DCRC/diverter Dsub | 48 | 33 | 10 | 28 | 14 | 32 | 17 | 43 | 1 | 44 | ||||||
| Dsub diverter board | U09-2 | U10-3 | U06-3 | U07-3 | U08-4 | U09-1 | U10-4 | U06-4 | U01-4 | U07-5 | ||||||
| Run75 Warm-side Accessory Wires: Motor coil (MC), endstop (ES), Goldman thermometer (GT) | ||||||||||||||||
| diverter board wires | MC Orange | MC Brown | MC Red | MC Yellow | GT Black | ES White Blue | ES Green | GT White | GT Red | GT Green | ? | |||||
Setup
| Run 77 Channel Map | |||||
|---|---|---|---|---|---|
| https://zzz.physics.umn.edu/!cdms/cdms/k100/run_diary/20220322 says the DCRCs are connected to Cable No. differently. | |||||
| Tower | Cable & Stripline | DCRC(2sided) | Label | HV output, Side1-readout | HV output, Side2-readout |
| Face5pA | Cable 2 (includes LEDs and accessories) HV CONN1 Stripline 41 | DCRC3 | Side1pE | HV1 pA | - |
| Face5pB | Side1pB | HV1 pB | - | ||
| Face5pC | Side1pD | HV1 pC | - | ||
| Face5pD | Side2pE | - | HV2 pD | ||
| Face3pA | Cable 1 HV CONN2 Stripline 48 | DCRC1 | Side2pC | - | HV2 pA |
| Face3pB | Side2pF | - | HV2 pB | ||
| Face3pC | Side1pC | HV2 pC | - | ||
| Face3pD | Side1pF | HV2 pD | - | ||
| Face2pA | Cable 3 HV CONN3 Stripline 43 | DCRC4 | Side2pB | - | HV1 pA |
| Face2pB | Side2pA | - | HV1 pB | ||
| Face2pC | Side1pA | HV2 pB | - | ||
| Face2pD | Side2pD | - | HV1 pD | ||
| At 1455 on https://zzz.physics.umn.edu/!cdms/cdms/k100/run_diary/20220328, DCRC1 started working again. | |
|---|---|
| 1510 | Fire up all 3 DCRCs in this configuration: Cable 2/1/3 → diverter/nothing/nothing → DCRC50(3)/DCRC55(1)/DCRCX(4). Seeing pulses in most channels though some look ugly - let's zap SQUIDs. |
SQUET Status
| From IbIs with MC = 31 mK | |||||||
|---|---|---|---|---|---|---|---|
| SQUET | Cable | DCRC channel | Detector channel | SQUID Bias | SQUID Lockpoint | After Third 10K pumpout | Previous Run |
| ZC-74 | 1 | DCRC1pC | Side1pC | -92.6 | -3.98 | no transition(feedback resistance low) | 235 |
| ZC-74 | 1 | DCRC1pD | Side1pF | -97.9 | -2.4 | 148 | 274 |
| ZC-31 | 2 | DCRC3pA | Side1pE | -98.1 | -6.12 | 135 | 246 |
| ZC-31 | 2 | DCRC3pB | Side1pB | -87.6 | -3.49 | 190 | 225 |
| ZC-31 | 2 | DCRC3pC | Side1pD | -44.4 | -2.86 | no transition | 258 |
| ZC-26 | 3 | DCRC4pC | Side1pA | -83.7 | -7 | 320 | 212 |
| ZC-74 | 1 | DCRC1pA | Side2pC | -95(guess) | -2.5(guess) | no transition | |
| ZC-74 | 1 | DCRC1pB | Side2pF | -100 | -2.01 | no transition | |
| ZC-31 | 2 | DCRC3pD | Side2pE | -89.1 | -3.81 | no transition | |
| ZC-26 | 3 | DCRC4pA | Side2pB | -83(guess) | -5.91(guess) | no response to change in QETbias | |
| ZC-26 | 3 | DCRC4pB | Side2pA | -83(guess) | -5.91(guess) | no response to change in QETbias | |
| ZC-26 | 3 | DCRC4pD | Side2pD | -93.1 | 1.56 | no transition | |
Issues Summary
1) As seen previously in Run 76, after cooling to base temperature of 30 mK, temperature spikes starts to show up after 6-8 hours. Spikes have a spread of 15-20 mK and some are very high(50-60 mK).
2) The overall fridge temperature also goes up as time progress as shown below
3) Phonon-channels remain normal or goes to normal about 6 hrs after the temperature spikes are seen.