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2012/04/24

1100 Filled LN2 cold trap.

20cm Drop Test to At Rest Ratios

  • The following graphs show the ratios of the noise profiles for each channel of the 20cm Drop Test divided by the At Rest tests.
  • The y-axes are mislabeled as V/√Hz, when they should be unitless.
Figure 1: DCRC32 attached to Flex v_3; DCRC33 attached to vacuum side coax.
Figure 2: DCRC33 attached to Flex v_3; DCRC32 attached to vacuum side coax.
Figure 3: DCRC32 attached to both side coaxes.
Figure 4: DCRC33 attached to both side coaxes.

Charge Gain Measurement

Table 1: Charge Gain Measurements.
Channel Gain Gain/4
Qi vacuum 512.8 128.2
Qo vacuum 472.2 118.1
Qi flexible 582.0 145.5
Qo flexible 615.6 153.9

Charge Noise PSDs (Gain Removed)

  • Some of the PSDs taken on April 24th were reanalyzed by removing the gain for each channel.
Figure 5: DCRC32 attached to Flex v_3; DCRC33 attached to vacuum side coax.