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AC loss and contact resistance in Nb_3Sn rutherford cables with and without a stainless steel core

机译:NB_3SN Rutherford电缆的交流损耗和接触电阻,没有不锈钢芯

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Calorimetric measurements of AC loss and hence interstrand contact resistance (IRC), were measured on two types of Rutherford cable wound with unplated Nb_3Sn strand. One of the cable types was furnished with a thin core of AISI 316L stainless steel and the other was left uncored. The cables were subjected to pressures of 5, 10, and 20 MPa, respectively, during reaction heat treatment (RHT), and to 100 MPa during measurement. AC loss was measured at 4.2 K in sinusoidal fields of amplitudes 200 and 400 mT at frequencies of 5 to 90 mHz both with and without the presence of DC bias fields of up to 1T. The transverse fields were applied both parallel and perpendicular to the face of the cable. For the cored cable IRC was relatively high, typically 70 #mu##nduction is not a new technique but the use of the decay constant of currents generated this way for the determination of minute electrical resistance seems novel to the author. Unexpected details in the results will be discussed.#cym#al Conference (ICMC), July 28-August 1, 1997, Portland, Oregon##e??s are cross-checked to the resistance measurements. On the other hand, we correlate these resistance measurements to the strand inner characteristics thanks to a finite element code. The effect of the resistive barrier location is discussed.#cym#al Conference (ICMC), July 28-August 1, 1997, Portland, Oregon## =6? stainless steel coil
机译:对AC损耗的量热测量和意识形式的接触电阻(IRC)进行了两种类型的Rutherford电缆卷绕,用未镀NB_3SN股线测量。其中一条电​​缆类型配备了AISI 316L不锈钢的薄芯,另一个薄薄的核心未采用。在反应热处理(RHT)期间,分别在5,10和20MPa的压力下进行5,10和20MPa,并在测量期间得到100MPa。在4.2 k的幅度200k的4.2 k下测量AC损耗,频率为5至90MHz的400mt,两者在没有直流偏置场的情况下高达1T。横向场平行地施加,垂直于电缆的面部。对于芯片电缆IRC相对较高,通常为70#mu ## ndraction不是一种新的技术,而是利用这种方式产生的衰减常数为测定微小电阻似乎是作者的新颖。结果将讨论结果中的意外细节。#CYM#Al会议(ICMC),1997年7月28日至8月1日,波特兰,俄勒冈州俄勒冈州## E ?? S交叉检查到电阻测量。另一方面,由于有限元码,我们将这些电阻测量与股线内部特征相关联。讨论了电阻势垒位置的效果。#Cym#Al会议(ICMC),1997年7月28日至8月1日,波特兰,俄勒冈州## = 6?不锈钢线圈

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