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Table of Contents

2012/07/17

0030 Fill N2 cold trap full.
1130 Filled LN2 cold trap.
1155 Fed Cricket 3 pellets.
1737 Begin LHe transfer (31.3%).
1819 End LHe transfer (94.7%).
1819 Fed Cricket 4 pellets.
2355 Fill N2 cold trap full.

Modulation Curves & SQUID Settings

DIB 1 : DCRC32

Table 1: SQUID Settings for DIB 1 DCRC32
Channel Driver Offset [V] Polarity SQUID bias [μA] Lockpoint [mV] Modulation Depth [mV]
A 0.0 non-inverting 85.0 3.79 5.4
B 0.0 inverting 90.8 3.79 5.7
C 0.0 non-inverting 89.8 4.48 5.9
D 0.0 inverting 86.9 2.72 5.6
Figure 1: Modulation Curves for DIB 1 Channel A
Figure 2: Modulation Curves for DIB 1 Channel B
Figure 3: Modulation Curves for DIB 1 Channel C
Figure 4: Modulation Curves for DIB 1 Channel D

DIB 2 : DCRC33

Table 2: SQUID Settings for DIB 2 DCRC33
Channel Driver Offset [V] Polarity SQUID bias [μA] Lockpoint [mV] Modulation Depth [mV]
A 0.0 non-inverting 66.4 3.41 4.6
B 0.0 non-inverting 85.0 2.43 4.6
C 1.02 non-inverting 86.0 1.60 4.7
D 0.0 inverting 84.3 3.02 4.1
Figure 5: Modulation Curves for DIB 2 Channel A
Figure 6: Modulation Curves for DIB 2 Channel B
Figure 7: Modulation Curves for DIB 2 Channel C
Figure 8: Modulation Curves for DIB 2 Channel D

DIB 3 : DCRC30

Table 3: SQUID Settings for DIB 3 DCRC30
Channel Driver Offset [V] Polarity SQUID bias [μA] Lockpoint [mV] Modulation Depth [mV]
A 0.0 non-inverting 75.2 3.70 4.6
B 0.0 non-inverting 67.4 2.43 4.5
C 0.0 non-inverting 79.1 3.60 4.2
D 0.0 non-inverting 80.1 2.53 4.6
Figure 9: Modulation Curves for DIB 3 Channel A
Figure 10: Modulation Curves for DIB 3 Channel B
Figure 11: Modulation Curves for DIB 3 Channel C
Figure 12: Modulation Curves for DIB 3 Channel D

Noisy DIB 2 SQUIDs? New SQUET Card ZC-28

Figure 13: Zoomed-in Responsivity for DIB 2 Channels B (left) & C (right).