Experimental Test - Checking on the use of shielding for the cable and calculation of Sigma (S)

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Experimental Test - Checking on the use of shielding for the cable and calculation of Sigma (S)

Post  Alessandro on Mon Jan 25, 2010 2:16 pm

Data acquisition
We acquired data in time intervals of: 1 hours, and 30 minutes

The shield is equal to the mass of the cable.
The cable length is approximately 2 m.

Scan:
Measurements were made every 0.5 s (this applies to every step)

Sequence steps:
I - 1 hours (without shielding)
II - 1 hours (with shielding)
III - 30 minutes (with shielding) - (Data taken from step II - Last 30 minutes)
IV - 30 minutes (without shielding)

Step I (without shielding):

Data Acquisition:



Histograms with bin = 0.0035:



Gaussian Fit:



Result S: S=0.01


Step II (with shielding):

Data Acquisition:



Histograms with bin = 0.0035:



Gaussian Fit:



Result S: S=0.006


Step III (with shielding):

Data Acquisition:



Histograms with bin = 0.0035:



Gaussian Fit:



Result S: S=0.006


Step IV (without shielding):

Data Acquisition:



Histograms with bin = 0.0035:



Gaussian Fit:



Result S: S=0.005

Conclusions:

  • The steps III and IV shows that the shielding is not necessary, S is about the same.
  • On average, the S is about 0.006 that we consider good.
  • In step I, the S is larger, this is due to the thermometer; requires a time interval of stabilization.
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Alessandro

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