Sec. 1.8 References 23 8. What is the lowest density of a plasma that could be sustained in a reactor whose smallest dimension is 5 em, at an electron temperature of 1 eV? How would that density change for an electron temperature of 10 eV?

Question 1: What is the lowest density of a plasma that could be sustained in a reactor whose smallest dimension is 5 cm, at an electron temperature of 1 eV?

The lowest density of a plasma that could be sustained is approximately $10^{12} \, \text{cm}^{-3}$ at 1 eV.

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Question 2: How would that density change for an electron temperature of 10 eV?

At an electron temperature of 10 eV, the lowest density would decrease to approximately $10^{11} \, \text{cm}^{-3}$.