Analysis of the effects of impurity buildup on the performance of a reversed field pinch: Final report
Technical Report
·
OSTI ID:6723914
A Zero-Dimensional code has been developed and used for parametric studies of ZT-40M behavior and the projected behavior of CPRF(ZT-H). The code includes equations for energy balance for electrons and ions. Particle density and current are specified quantities. Impurities are treated using a coronal equilibrium model. The energy confinement times for electrons and ions are permitted through the use of multiplicative coefficients. Ohmic heating includes an anomaly factor, and an experimentally observed ion heating is modeled by use of a multiplicative factor times Ohmic heating. The data from ZT-40M is used to obtain a ''reasonable'' set of coefficients, and the effect on T/sub e/ and T/sub i/ of varying these coefficients is examined. Various levels and kinds of impurities are introduced and their effects are examined. Both flat top and ramp current waveforms are studied. The results are then applied to study a ramp startup of CPRF for a current level of 1 MA.
- Research Organization:
- Pennsylvania State Univ., University Park (USA)
- DOE Contract Number:
- FG02-86ER53219
- OSTI ID:
- 6723914
- Report Number(s):
- DOE/ER/53219-1; ON: DE87005438
- Country of Publication:
- United States
- Language:
- English
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