TRANSIENT ELECTRON HEAT DIFFUSIVITY OBTAINED FROM TRACE IMPURITY INJECTION ON TFTR

被引：65

作者：

KISSICK, MW ^{[1
]}

FREDRICKSON, ED ^{[1
]}

CALLEN, JD ^{[1
]}

BUSH, CE ^{[1
]}

CHANG, Z ^{[1
]}

EFTHIMION, PC ^{[1
]}

HULSE, RA ^{[1
]}

MANSFIELD, DK ^{[1
]}

PARK, HK ^{[1
]}

SCHIVELL, JF ^{[1
]}

SCOTT, SD ^{[1
]}

SYNAKOWSKI, EJ ^{[1
]}

TAYLOR, G ^{[1
]}

ZARNSTORFF, MC ^{[1
]}

机构：

[1] UNIV WISCONSIN,DEPT NUCL ENGN & ENGN PHYS,MADISON,WI 53706

来源：

NUCLEAR FUSION | 1994年 / 34卷 / 03期

关键词：

D O I：

10.1088/0029-5515/34/3/I03

中图分类号：

O35 [流体力学]; O53 [等离子体物理学];

学科分类号：

070204 ; 080103 ; 080704 ;

摘要：

A new method for obtaining a transient ('pulse') electron heat diffusivity (chi(e)p) in the radial region 0.38 < r/a < 0.56 in TFTR L mode discharges is presented. Small electron temperature perturbations were caused by single bursts of injected impurities which radiated and cooled the plasma edge. A case of iron injection by laser ablation was found to be more definitive than a supporting helium gas puff case. In this new 'cold pulse' method, the authors concentrate on modelling just the electron temperature perturbations, tracked with electron cyclotron emission diagnostics, and on being able to justify separation of the perturbations in space and time from the cooling source. This chi(e)p is obtained for these two cases to be chi(e)p = (6.0 M2/S +/- 35%) approximately 4chi(e)power balance), which is consistent with but more definitive than results from other studies that are more susceptible to ambiguities in the source profile.

引用

页码：349 / 358

页数：10

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