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==Minimum operating current==

*There is a minimum operating current due to need to work in the magnetic self-isolating regime [L. E. Aranchuk, A. S. Chuvatin, and J. Larour, Rev. Sci. Instrum. 75, 69 (2004)]
*For our geometry (6 mm gam, 2.5" anode and 2" cathode) and taking min voltage 60 kV, the minimum operating current will be
<math>  I = 0.64 \sqrt{V} \ \ln{R_a/R_c} = 22 kA</math>


==10/30/14 Spielman about calibration error==
*error in my Rogowski calibration (proposal, short12, 082914) is 1.3% just because of scope digitization
*we need to reduce this error with multiple shorts: do 10 shots => error ~1/sqrt(10)