Task #24209
DR1_Run_7
0%
Description
Initial information on DR1_Run_7.
Schematics of the fridge can be found here:
https://cdcvs.fnal.gov/redmine/projects/runs/repository/revisions/master/raw/DR1_run_7/DR1_run_7.pdf
We will have 4 qubits to test:
1) RI-1 (TERI001) 3 GHz cavity with qubit, from last DR1_run_6 f=2.996106286 GHz; Q~ 1E+8; T=3.8 K (see: https://cdcvs.fnal.gov/redmine/issues/23805)
2) RI-2 (TERI002) 3 GHz cavity with qubit (we were not able to find resonance during last DR1_run_6.)
3) Pappas' qubit (see: https://cdcvs.fnal.gov/redmine/issues/24199 )
4) McDermott's qubit is same as last DR1_run_6, but flux biasing lines are now disconnected and we attached qubit to the plate with aluminum c-clamp instead of stainless steel screws.
Several RF lines are now connected to the fridge with DC-blocks (except those who run DC current), connector panels on the fridge and in the RF equipment rack are made from dielectric in attempt to prevent possible ground loops.
we also have:
5) Pappas' 5 GHz JPA (see: https://cdcvs.fnal.gov/redmine/issues/22808#note-18 )
6) Pappas' 3 GHz JPA
7) Lincoln Lab TWPA (see: https://cdcvs.fnal.gov/redmine/issues/22808#note-12 )
History
#1 Updated by Daniil Frolov about 1 year ago
- File warm_electronics.jpg warm_electronics.jpg added
I'm adding here schematics of warm electronics that can be controlled from Labber.
#2 Updated by Daniil Frolov about 1 year ago
- File IQ_down_converter.pdf IQ_down_converter.pdf added
Attached is schematics of the downconverter.
it can be also found here:
https://redmine.fnal.gov/redmine/projects/rf-systems/repository/revisions/master/raw/iq_downconverter/IQ_down_converter.pdf
#3 Updated by Daniil Frolov about 1 year ago
- File pappas_t2.GIF pappas_t2.GIF added
- File pappas_t1.GIF pappas_t1.GIF added
- File pappas_rabi.GIF pappas_rabi.GIF added
- File pulsed_qubit_scan.GIF pulsed_qubit_scan.GIF added
- File pulsed_readout_scan.GIF pulsed_readout_scan.GIF added
- File pappas_vna_qubit_search.GIF pappas_vna_qubit_search.GIF added
- File pappas_vna_readout_scan.GIF pappas_vna_readout_scan.GIF added
- File teri002_shift.GIF teri002_shift.GIF added
Summary for cavities:
we didn't find TM010 modes in the cavities. Seems that Q0 is very bad.
In TERI002 cavity we found shift in frequency at low power in 7.09902 GHz mode. Shift is 6.4 kHz
D:\redmine\runs\DR1_run_7\Labber\Data\2020\04\Data_0403\shift_search_in_TERI002_7.099G_zoom.hdf5
Some scans included external high power amplifier when we scanned 2.5-3.5 GHz range to improve noise floor:
D:\redmine\runs\DR1_run_7\Labber\Data\2020\03\Data_0331\TM010_search_in_TERI001_poweramp_2.5-3.5.hdf5
D:\redmine\runs\DR1_run_7\Labber\Data\2020\04\Data_0401\TM010_search_in_TERI002_poweramp_2.5-3.5.hdf5
High resolution scan of high order modes in TERI002 is here:
D:\redmine\runs\DR1_run_7\Labber\Data\2020\04\Data_0403\shift_search_in_TERI002_6.87-8.hdf5
Other various scans of cavities TERI002 and TERI001 can be found data folders from 2020-03-27 till 2020-04-03.
Summary for Pappas' qubit:
1)Fast VNA readout freq vs power scan:
D:\redmine\runs\DR1_run_7\Labber\Data\2020\04\Data_0405\Pappas_Chi0_PowerScan_6.481GHz_2.hdf5
2) Fast VNA qubit frequency scan vs readout power:
D:\redmine\runs\DR1_run_7\Labber\Data\2020\04\Data_0405\Pappas_QubitSearch_5.3-5.8GHz_Pqub-20dBm_Pcav-60dBm.hdf5
3) Pulsed readout vs power scan:
D:\redmine\runs\DR1_run_7\Labber\Data\2020\04\Data_0405\Pappas_PulsedReadout_trial.hdf5
4) Pulsed qubit scan + anharmonicity:
D:\redmine\runs\DR1_run_7\Labber\Data\2020\04\Data_0407\Pappas_Pulsed_qubit_search_2DaysLater.hdf5
D:\redmine\runs\DR1_run_7\Labber\Data\2020\04\Data_0405\Pappas_Pulsed_qubit_search_2.hdf5
5) Rabi oscillations. 
D:\redmine\runs\DR1_run_7\Labber\Data\2020\04\Data_0407\Pappas_Pulsed_Vq+-1000mV_L0-500ns_Gauss_Scan_2.hdf5
D:\redmine\runs\DR1_run_7\Labber\Data\2020\04\Data_0407\Pappas_Pulsed_Vq+-1000mV_L0-500ns_Gauss_Scan.hdf5
D:\redmine\runs\DR1_run_7\Labber\Data\2020\04\Data_0406\Pappas_Pulsed_Vq+-1000mV_L0-500ns_Gauss_Scan.hdf5
6) T1 
D:\redmine\runs\DR1_run_7\Labber\Data\2020\04\Data_0408\Pappas_T1_scan_Gauss_Scan_2_pi-puse_467mV_200ns.hdf5
7) T2
D:\redmine\runs\DR1_run_7\Labber\Data\2020\04\Data_0408\Pappas_T2_scan_Gauss_Scan_half_pi-puse_233mV_200ns.hdf5
We tried to measure Rabi and t1 when all cables except two are disconnected from the fridge and dc-blocks on those two cables were used, but didn't notice significant difference with normal setup.
#4 Updated by Daniil Frolov about 1 year ago
- File pappas_t2echo.GIF pappas_t2echo.GIF added
- File pappas_t2a.GIF pappas_t2a.GIF added
Some more:
8) T2 with higher resolution. Qubit de-tuning here was -1.67MHz.
D:\redmine\runs\DR1_run_7\Labber\Data\2020\04\Data_0408\Pappas_T2_scan_Gauss_Scan_half_pi-puse_233mV_200ns_qubit_detuned by -1.67MHz.hdf5
9) T2 echo with qubit de-tuning -1.67MHz.
D:\redmine\runs\DR1_run_7\Labber\Data\2020\04\Data_0408\Pappas_T2_echo_scan_Gauss_half_pi-puse_233mV_200ns_pi_pulse_467mV_200ns_qubit_detuned by -1.67MHz.hdf5