2009/12/07
- Run Diary
- Data List

2009/12/07

Run Diary

Time	Task
11:21	Measure ground noise. Take data Run 1.
11:27	Connected two braided cables for thermometry to the breakout box, with LS370 DB9 connector disconnected, ground noise doesn't change.
12:00	Disconnect LS370 cable shield from the the DB90 connector. Noise peak at 52.5 kHz shifted to 52.75 kHz, magnitude reduced by ~1 uV.
12:11	Connect LS370 and take data Run 2.
12:14	Turn on DCRC. Take data Run 3.

Orange ground to fridge voltage psd

matlab .fig file
DCRC contributes a lot to ground noise. The peak also shifted from 55.5 kHz to 51.25 kHz after decoupling LS370.

Time	Task
12:29	Check DCRC calibration constants.

DCRC calibration constants
devd 1 1 Dev50.Ch00=2000 QinnerOffset Qinner bias is zero with this setting. [DAC] Dev50.Ch01=05B9 QinnerSlope The Qinner bias setting slope [uV/DAC] Dev50.Ch02=2000 QouterOffset Qouter bias is zero with this setting. [DAC] Dev50.Ch03=05B9 QouterSlope The Qouter bias setting slope [uV/DAC] Dev50.Ch04=2004 QETOffsetA Ch A QET bias is zero with this setting. [DAC] Dev50.Ch05=46B4 QETSlopeA Ch A QET bias setting slope. [10 pA/DAC] Dev50.Ch06=0808 SqOffsetA Ch A SQUID bias is zero with this setting. [DAC] Dev50.Ch07=2714 SqSlopeA Ch A SQUID bias setting slope. [10 pA/DAC] Dev50.Ch08=0802 LockOffsetA Ch A Lockpoint is zero with this setting. [DAC] Dev50.Ch09=1A14 LockSlopeA Ch A Lockpoint setting slope. [uV/DAC] Dev50.Ch0A=07FE DriveOffsetA Ch A Driver Offset is zero with this setting. [DAC] Dev50.Ch0B=084D DriveSlopeA Ch A Driver Offset setting slope. [-uV/DAC] Dev50.Ch0C=0843 NullOffsetA Ch A Offset Null is zero with this setting. [DAC] Dev50.Ch0D=0121 NullSlopeA Ch A Offset Null setting slope. [uV/DAC] Dev50.Ch0E=1FF9 QETOffsetB Ch B QET bias is zero with this setting. [DAC] Dev50.Ch0F=4840 QETSlopeB Ch B QET bias setting slope. [10 pA/DAC] Dev50.Ch10=0802 SqOffsetB Ch B SQUID bias is zero with this setting. [DAC] Dev50.Ch11=2700 SqSlopeB Ch B SQUID bias setting slope. [10 pA/DAC] Dev50.Ch12=0817 LockOffsetB Ch B Lockpoint is zero with this setting. [DAC] Dev50.Ch13=1A27 LockSlopeB Ch B Lockpoint setting slope. [uV/DAC] Dev50.Ch14=080E DriveOffsetB Ch B Driver Offset is zero with this setting. [DAC] Dev50.Ch15=083D DriveSlopeB Ch B Driver Offset setting slope. [-uV/DAC] Dev50.Ch16=08B5 NullOffsetB Ch B Offset Null is zero with this setting. [DAC] Dev50.Ch17=0127 NullSlopeB Ch B Offset Null setting slope. [uV/DAC] Dev50.Ch18=1FFB QETOffsetC Ch C QET bias is zero with this setting. [DAC] Dev50.Ch19=4867 QETOffsetC Ch C QET bias is zero with this setting. [DAC] Dev50.Ch1A=080F QETSlopeC Ch C QET bias setting slope. [10 pA/DAC] Dev50.Ch1B=269B SqOffsetC Ch C SQUID bias is zero with this setting. [DAC] Dev50.Ch1C=081A SqSlopeC Ch C SQUID bias setting slope. [10 pA/DAC] Dev50.Ch1D=1A02 LockOffsetC Ch C Lockpoint is zero with this setting. [DAC] Dev50.Ch1E=0804 LockSlopeC Ch C Lockpoint setting slope. [uV/DAC] Dev50.Ch1F=0873 DriveOffsetC Ch C Driver Offset is zero with this setting. [DAC] Dev50.Ch20=083C DriveSlopeC Ch C Driver Offset setting slope. [-uV/DAC] Dev50.Ch21=011C NullOffsetC Ch C Offset Null is zero with this setting. [DAC] Dev50.Ch22=2000 NullSlopeC Ch C Offset Null setting slope. [uV/DAC] Dev50.Ch23=482D QETOffsetD Ch D QET bias is zero with this setting. [DAC] Dev50.Ch24=07FD QETSlopeD Ch D QET bias setting slope. [10 pA/DAC] Dev50.Ch25=26EF SqOffsetD Ch D SQUID bias is zero with this setting. [DAC] Dev50.Ch26=080A SqSlopeD Ch D SQUID bias setting slope. [10 pA/DAC] Dev50.Ch27=1A21 LockOffsetD Ch D Lockpoint is zero with this setting. [DAC] Dev50.Ch28=07FC LockSlopeD Ch D Lockpoint setting slope. [uV/DAC] Dev50.Ch29=0859 DriveOffsetD Ch D Driver Offset is zero with this setting. [DAC] Dev50.Ch2A=08D1 DriveSlopeD Ch D Driver Offset setting slope. [-uV/DAC] Dev50.Ch2B=012C NullOffsetD Ch D Offset Null is zero with this setting. [DAC] Dev50.Ch2C=FFFF NullSlopeD Ch D Offset Null setting slope. [uV/DAC] Dev50.Ch2D=FFFF LEDSlope1 LED 1 current setting slope. [uA/DAC] Dev50.Ch2E=FFFF LEDSlope2 LED 2 current setting slope. [uA/DAC] Dev50.Ch2F=FFFF FBGain Feedback gain with PGA set to 1. Dev50.Ch30=FFFF OutGain Output gain with PGA set to 1. Dev50.Ch31=FFFF

DCRC calibration constants

devd 1 1
 Dev50.Ch00=2000 QinnerOffset   Qinner bias is zero with this setting. [DAC]
 Dev50.Ch01=05B9 QinnerSlope    The Qinner bias setting slope [uV/DAC]
 Dev50.Ch02=2000 QouterOffset   Qouter bias is zero with this setting. [DAC]
 Dev50.Ch03=05B9 QouterSlope    The Qouter bias setting slope [uV/DAC]
 Dev50.Ch04=2004 QETOffsetA     Ch A QET bias is zero with this setting. [DAC]
 Dev50.Ch05=46B4 QETSlopeA      Ch A QET bias setting slope. [10 pA/DAC]
 Dev50.Ch06=0808 SqOffsetA      Ch A SQUID bias is zero with this setting. [DAC]
 Dev50.Ch07=2714 SqSlopeA       Ch A SQUID bias setting slope. [10 pA/DAC]
 Dev50.Ch08=0802 LockOffsetA    Ch A Lockpoint is zero with this setting. [DAC]
 Dev50.Ch09=1A14 LockSlopeA     Ch A Lockpoint setting slope. [uV/DAC]
 Dev50.Ch0A=07FE DriveOffsetA   Ch A Driver Offset is zero with this setting. [DAC]
 Dev50.Ch0B=084D DriveSlopeA    Ch A Driver Offset setting slope. [-uV/DAC]
 Dev50.Ch0C=0843 NullOffsetA    Ch A Offset Null is zero with this setting. [DAC]
 Dev50.Ch0D=0121 NullSlopeA     Ch A Offset Null setting slope. [uV/DAC]
 Dev50.Ch0E=1FF9 QETOffsetB     Ch B QET bias is zero with this setting. [DAC]
 Dev50.Ch0F=4840 QETSlopeB      Ch B QET bias setting slope. [10 pA/DAC]
 Dev50.Ch10=0802 SqOffsetB      Ch B SQUID bias is zero with this setting. [DAC]
 Dev50.Ch11=2700 SqSlopeB       Ch B SQUID bias setting slope. [10 pA/DAC]
 Dev50.Ch12=0817 LockOffsetB    Ch B Lockpoint is zero with this setting. [DAC]
 Dev50.Ch13=1A27 LockSlopeB     Ch B Lockpoint setting slope. [uV/DAC]
 Dev50.Ch14=080E DriveOffsetB   Ch B Driver Offset is zero with this setting. [DAC]
 Dev50.Ch15=083D DriveSlopeB    Ch B Driver Offset setting slope. [-uV/DAC]
 Dev50.Ch16=08B5 NullOffsetB    Ch B Offset Null is zero with this setting. [DAC]
 Dev50.Ch17=0127 NullSlopeB     Ch B Offset Null setting slope. [uV/DAC]
 Dev50.Ch18=1FFB QETOffsetC     Ch C QET bias is zero with this setting. [DAC]
 Dev50.Ch19=4867 QETOffsetC     Ch C QET bias is zero with this setting. [DAC]
 Dev50.Ch1A=080F QETSlopeC      Ch C QET bias setting slope. [10 pA/DAC]
 Dev50.Ch1B=269B SqOffsetC      Ch C SQUID bias is zero with this setting. [DAC]
 Dev50.Ch1C=081A SqSlopeC       Ch C SQUID bias setting slope. [10 pA/DAC]
 Dev50.Ch1D=1A02 LockOffsetC    Ch C Lockpoint is zero with this setting. [DAC]
 Dev50.Ch1E=0804 LockSlopeC     Ch C Lockpoint setting slope. [uV/DAC]
 Dev50.Ch1F=0873 DriveOffsetC   Ch C Driver Offset is zero with this setting. [DAC]
 Dev50.Ch20=083C DriveSlopeC    Ch C Driver Offset setting slope. [-uV/DAC]
 Dev50.Ch21=011C NullOffsetC    Ch C Offset Null is zero with this setting. [DAC]
 Dev50.Ch22=2000 NullSlopeC     Ch C Offset Null setting slope. [uV/DAC]
 Dev50.Ch23=482D QETOffsetD     Ch D QET bias is zero with this setting. [DAC]
 Dev50.Ch24=07FD QETSlopeD      Ch D QET bias setting slope. [10 pA/DAC]
 Dev50.Ch25=26EF SqOffsetD      Ch D SQUID bias is zero with this setting. [DAC]
 Dev50.Ch26=080A SqSlopeD       Ch D SQUID bias setting slope. [10 pA/DAC]
 Dev50.Ch27=1A21 LockOffsetD    Ch D Lockpoint is zero with this setting. [DAC]
 Dev50.Ch28=07FC LockSlopeD     Ch D Lockpoint setting slope. [uV/DAC]
 Dev50.Ch29=0859 DriveOffsetD   Ch D Driver Offset is zero with this setting. [DAC]
 Dev50.Ch2A=08D1 DriveSlopeD    Ch D Driver Offset setting slope. [-uV/DAC]
 Dev50.Ch2B=012C NullOffsetD    Ch D Offset Null is zero with this setting. [DAC]
 Dev50.Ch2C=FFFF NullSlopeD     Ch D Offset Null setting slope. [uV/DAC]
 Dev50.Ch2D=FFFF LEDSlope1      LED 1 current setting slope.  [uA/DAC]
 Dev50.Ch2E=FFFF LEDSlope2      LED 2 current setting slope.  [uA/DAC]
 Dev50.Ch2F=FFFF FBGain         Feedback gain with PGA set to 1.
 Dev50.Ch30=FFFF OutGain        Output gain with PGA set to 1.
 Dev50.Ch31=FFFF

Time	Task
12:56	Temperature goes up to 41 mK and plateaus. Ground fridge to orange ground.
13:01	Reset DCRC and wait for fridge to cool down.
14:01	Temperature bumps up again.

DCRC QET Bias Zeroing
QET	Decimal	Hex	QET bias (μV)
A	36.9	20CC	± 0.25
B	0.6	2003	drifts
C	-0.1	1FFF	0.5
D	1.5	2008	drifts

Time	Task
14:34	Take psd of QET B noise. run004 to run010.

phB Superconducting noise psd at different output gains

matlab .fig file
All noise peaks overlap perfectly. The peaks are from before the output gain. DCRC noise dominates.
Above plot in loglog scale

Time	Task
16:00	Have been waiting for temperature to stabilize. But it doesn't.

Mixing chamber temperature

Time	Task
17:43	Measure FB voltage change during SQUID lock. Take data run011 and run012.

Phonon FB voltage change during SQUID lock (open loop → non-inverting)

In the above plot, FE gain of C was 6 and D was 7 if I remember correctly. Jeter suggested to close the loop at FE Gain = 0. I then redid the measurements shown below.
Phonon FB voltage change during SQUID lock (open loop → non-inverting)

matlab .fig file

Phonon modulation curves

Data List

All data and figures can be found at http://www.hep.umn.edu/cdms/cdms_restricted/K100/runs/run001/20091207/

Measure the PSD of the voltage between the orange and the fridge

Time	Run #	Comment
11:25	1	Orange ground to fridge, east lights off, LS370 disconnected.
12:11	2	Orange ground to fridge, east lights off, LS370 connected.
12:16	3	Orange ground to fridge, east lights off, LS370 connected, DCRC on.

run004 to run010 settings
MC T = 41 mK; QET B: FE Gain = 7, FB Null = 7.09 mV, Driver Offset = -0.03 V, SQUID Bias = 93.04 uA, Lockpoint = 3.30 mV, QET Bias = 0.6 uA; Fridge grounded to orange ground;

Time	Run #	Comment
14:30	4	QET B Output gain = 1.
	5	QET B Output gain = 2.
	6	QET B Output gain = 3.
	7	QET B Output gain = 4.
	8	QET B Output gain = 5.
	9	QET B Output gain = 6.
	10	QET B Output gain = 7.

run011 settings
MC T = 37 mK; QET C: FE Gain = 0, Output gain = 1, FB Null = 0.02 mV, Driver Offset = 0.00 V, SQUID Bias = 76.63 uA, Lockpoint = 2.38 mV, QET Bias = 0.1 uA; Fridge grounded to orange ground;

Time	Run #	Comment
17:43	11	QET C open loop to non-inverting.

run012 settings
MC T = 37 mK; QET D: FE Gain = 0, Output gain = 1, FB Null = 0.02 mV, Driver Offset = 0.02 V, SQUID Bias = 68.91 uA, Lockpoint = 1.57 mV, QET Bias = 0.1 uA; Fridge grounded to orange ground;

Time	Run #	Comment
18:23	12	QET D open loop to non-inverting.

Channel	FE Gain	Output Gain	Feedback Null (mV)	Driver Offset (V)	SQUID Bias (uA)	Lockpoint (mV)	QET Bias (uA)
A	0	1	0.02	0.02	90.01	3.20	36.9
C	0	1	0.02	0.00	76.34	2.38	-0.1

Time	Run #	Comment
2009/12/08 14:33	13	QET A open loop to non-inverting.
	14	QET C open loop to non-inverting.

Table of Contents

2009/12/07

Run Diary

Data List