## Abstract

It is known that the radius ratio of a plasma

pinch depends on the specific heat ratio γ of the pinch plasma,

where radius pinch ratio is defined as: radius of plasma pinch

column/radius of anode. The lower the specific heat ratio the

lower would be the pinch radius ratio with corresponding

increased compression and pinch density. The deuterium plasma

focus pinch is invariably fully ionized and has a specific heat ratio

of practically the highest possible value of 5/3. If the deuterium

plasma focus could have its specific heat ratio reduced below 5/3

we might expect its radius ratio to be correspondingly reduced,

increasing the pinch density, thus improving the D–D fusion

neutron yield. To demonstrate this effect we run the Lee model

code in deuterium but hypothetically fix the specific heat ratio,

reducing it at each run. The results show that indeed the radius

ratio is reduced, increasing the compression, and the neutron

yield is substantially increased. The effect is used to explain the

observed neutron yield enhancement when a deuterium plasma

focus doped with a small amount of krypton.

pinch depends on the specific heat ratio γ of the pinch plasma,

where radius pinch ratio is defined as: radius of plasma pinch

column/radius of anode. The lower the specific heat ratio the

lower would be the pinch radius ratio with corresponding

increased compression and pinch density. The deuterium plasma

focus pinch is invariably fully ionized and has a specific heat ratio

of practically the highest possible value of 5/3. If the deuterium

plasma focus could have its specific heat ratio reduced below 5/3

we might expect its radius ratio to be correspondingly reduced,

increasing the pinch density, thus improving the D–D fusion

neutron yield. To demonstrate this effect we run the Lee model

code in deuterium but hypothetically fix the specific heat ratio,

reducing it at each run. The results show that indeed the radius

ratio is reduced, increasing the compression, and the neutron

yield is substantially increased. The effect is used to explain the

observed neutron yield enhancement when a deuterium plasma

focus doped with a small amount of krypton.

Original language | English |
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Pages (from-to) | 99-104 |

Journal | IEEE Transactions on Plasma Science |

Volume | 42 |

Issue number | 1 |

DOIs | |

Publication status | Published - 1 Jan 2014 |