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2012/07/27

0945 Fed Cricket 3 pellets.
1026 Filled LN2 cold trap.
1437 Stop the flashing started 13:59 after data taking.
1606 Temperature was close to base at 15:53. Still cooling.
1627 Modified DIB1/DCRC33 SQUID settings as the table below
DIB1/DCRC33 SQUID
SQUID bias [uA] Lockpoint [mV]
88 4.2
85 3
80 4.2
80 3
???? Sent 10mVpp 100Hz triangle to QET sensors. Set Frontend Gain of all phonon channels on DIB1/DCRC33 to 7 to correct the distortion of the triangle wave output. Raised the lowered the MC temperature at 2mK/min to measure the Rc's. Record the temperature at the beginning and end of the transitions, namely, at the moments where the clear triangle signal last disappeared before transition and first showed up after transition.
Tc of Phonon channels on DIB1/DCRC33 when MC T rising at 2mK/min
A B C D
81.46 81.84 82.3 74.3
82.1 83 82.9 75
Temperature dropping at 2mK/min
82.1 83.7 83 74.5
81.6 82 82.4
1820 Fed Cricket 4 pellets.
2113 Modified DIB2/DCRC32 SQUID settings to the table below
DIB2/DCRC32 SQUID
SQUID bias [uA] Lockpoint [mV]
60 3.2
85 2.6
82 3.2
82 3
2131 DIB2 channel D seems to have trapped flux. ZAP all SQUIDs on DIB2 twice in a row.
2146 No obvious improvements after zapping. The distortion in the modulation curve maybe due to something else.
2157 Modified DIB3/DCRC31 SQUID settings to the table below.
DIB3/DCRC31 SQUID
SQUID bias [uA] Lockpoint [mV]
75 3.5
65 2.5
70 3
78 3
2208 Send 10mVpp 1kHz, triangle wave down the QET bias lines. Increase the Frontend gain to 5 on all channels. Raise and lower the MC temperature at 2mK/min to check the Tc's.
Tc of Phonon channels on DIB3/DCRC31 when MC T rising at 2mK/min
A B C D
79.7 75.6 84.5 79.7
81 76.5 85.2 81
Temperature dropping at 2mK/min
81 76.7 85.2 81.1
80.2 75.7 84.8 79.8
Tc of Phonon channels on DIB2/DCRC32 when MC T rising at 2mK/min
A B C D
77 86.2 79.5 73.6
78.3 87.1 74.7
Temperature dropping at 2mK/min
78.7 87.2 80.1 74.5
76.9 86.4 79.9 73.5

The output of C2 was too small at 10mVpp 1khz excitation. Increased excitation to 100mVpp. When C2 is superconducting, the output triangle wave was ~60mVpp; When C2 was normal, the output signal was ~80mVpp. The pulses on C2 are not due to crosstalk since no pulses were seen at 0uA bias and the pulse polarity changes sign with QET bias.

2325 Set timing link. Use the following phonon setting to take data. 
----
DIB1/DCRC33

Phonon Channel:         0
QET Bias [uA]:          -100
Polarity:               1
Driver Offset:          1.25
Feedback Null [mV]:             0
Lockpoint [mV]:         4.2
SQUID Bias [uA]:                88
Output Gain:            1
Frontend Gain:          6

Phonon Channel:         1
QET Bias [uA]:          -100
Polarity:               1
Driver Offset:          1.25
Feedback Null [mV]:             0
Lockpoint [mV]:         3
SQUID Bias [uA]:                85
Output Gain:            1
Frontend Gain:          6

Phonon Channel:         2
QET Bias [uA]:          -100
Polarity:               1
Driver Offset:          0
Feedback Null [mV]:             0
Lockpoint [mV]:         4.2
SQUID Bias [uA]:                80
Output Gain:            1
Frontend Gain:          6

Phonon Channel:         3
QET Bias [uA]:          -100
Polarity:               1
Driver Offset:          0
Feedback Null [mV]:             0
Lockpoint [mV]:         3
SQUID Bias [uA]:                80
Output Gain:            1
Frontend Gain:          6

----
DIB2/DCRC32

Phonon Channel:         0
QET Bias [uA]:          -100
Polarity:               1
Driver Offset:          0.07
Feedback Null [mV]:             0
Lockpoint [mV]:         3.2
SQUID Bias [uA]:                60
Output Gain:            1
Frontend Gain:          10

Phonon Channel:         1
QET Bias [uA]:          -115
Polarity:               1
Driver Offset:          0.25
Feedback Null [mV]:             0
Lockpoint [mV]:         2.6
SQUID Bias [uA]:                85
Output Gain:            1
Frontend Gain:          10

Phonon Channel:         2
QET Bias [uA]:          -440
Polarity:               1
Driver Offset:          0.1
Feedback Null [mV]:             0
Lockpoint [mV]:         3.2
SQUID Bias [uA]:                86
Output Gain:            1
Frontend Gain:          10

Phonon Channel:         3
QET Bias [uA]:          -85
Polarity:               1
Driver Offset:          0
Feedback Null [mV]:             0
Lockpoint [mV]:         3
SQUID Bias [uA]:                82
Output Gain:            1
Frontend Gain:          10

----
DIB3/DCRC31

Phonon Channel:         0
QET Bias [uA]:          -100
Polarity:               1
Driver Offset:          0
Feedback Null [mV]:             0
Lockpoint [mV]:         3.5
SQUID Bias [uA]:                75
Output Gain:            1
Frontend Gain:          5

Phonon Channel:         1
QET Bias [uA]:          -80
Polarity:               1
Driver Offset:          0
Feedback Null [mV]:             0
Lockpoint [mV]:         2.5
SQUID Bias [uA]:                65
Output Gain:            1
Frontend Gain:          5

Phonon Channel:         2
QET Bias [uA]:          -100
Polarity:               1
Driver Offset:          0
Feedback Null [mV]:             0
Lockpoint [mV]:         3
SQUID Bias [uA]:                70
Output Gain:            1
Frontend Gain:          5

Phonon Channel:         3
QET Bias [uA]:          -100
Polarity:               1
Driver Offset:          0
Feedback Null [mV]:             0
Lockpoint [mV]:         3
SQUID Bias [uA]:                78
Output Gain:            1
Frontend Gain:          5

Data Set 07120727_0215 with Ba-133 & Am-241 and DIB1 +2 V, DIB2 -2 V

Figure 1: Qi and Qo spectra for zip 1 and zip 2 (no cross talk). Bulk, Qi and χ squared cuts.
Figure 2: Qsum spectra. Qi and χ squared cuts.
Figure 3: Qsum vs Event Time. Qi and χ squared cuts.
Figure 4: χ Squared vs. Qsum. Qi cut.

Data Set 07120727_0436 with Ba-133 & Am-241 and DIB1 -2 V, DIB2 +2 V

Figure 1: Qi and Qo spectra for zip 1 and zip 2 (no cross talk). Bulk, Qi and χ squared cuts.
Figure 2: Qsum spectra. Qi and χ squared cuts.
Figure 3: Qsum vs Event Time. Qi and χ squared cuts.
Figure 4: χ Squared vs. Qsum. Qi cut.
Figure 5: Qsum (max of side 1 and side 2) - 1st 15 minutes; Threshhold, Bulk, and χ2 cut [RR]

Data Set 07120727_0658 with Ba-133 & Am-241 and DIB1 +4 V, DIB2 -4 V

Figure 1: Qi and Qo spectra for zip 1 and zip 2 (no cross talk). Bulk, Qi and χ squared cuts.
Figure 2: Qsum spectra. Qi and χ squared cuts.
Figure 3: Qsum vs Event Time. Qi and χ squared cuts.
Figure 4: χ Squared vs. Qsum. Qi cut.
Figure 5: Qsum (max of side 1 and side 2) - 1st 15 minutes; Threshhold, Bulk, and χ2 cut [RR]

Data Set 07120727_1140 with Ba-133 & Am-241 and DIB1 +6 V, DIB2 -6 V

Figure 1: Qi and Qo spectra for zip 1 and zip 2 (no cross talk). Bulk, Qi and χ squared cuts.
Figure 2: Qsum spectra. Qi and χ squared cuts.
Figure 3: Qsum vs Event Time. Qi and χ squared cuts.
Figure 4: χ Squared vs. Qsum. Qi cut.
Figure 5: Qsum (max of side 1 and side 2) - 1st 15 minutes; Threshhold, Bulk, and χ2 cut [RR]