A cryogenic sensing element for measurement current transformers

被引：3

作者：

Arpaia, P. ^{[1
,2
]}

Ballarino, A. ^{[2
]}

Bottura, L. ^{[2
]}

Montenero, G. ^{[2
]}

机构：

[1] Univ Sannio, Dipartimento Ingn, I-82100 Benevento, Italy

[2] CERN, European Lab Nucl Res, Dept Technol, Grp Magnets, CH-1211 Geneva 23, Switzerland

来源：

JOURNAL OF INSTRUMENTATION | 2014年 / 9卷

关键词：

Accelerator Subsystems and Technologies; Accelerator Applications; Acceleration cavities and magnets superconducting (high-temperature superconductor; radiation hardened magnets; normal-conducting; permanent magnet devices; wigglers and undulators); TEST FACILITY;

D O I：

10.1088/1748-0221/9/03/P03011

中图分类号：

TH7 [仪器、仪表];

学科分类号：

080401 [精密仪器及机械];

摘要：

The design of a cryogenic sensing element for superconducting DC current transformers working up to 100 kA at 4.2 K is proposed. Limitations of m-metal magnetic characteristics at cryogenic conditions are overcome by a soft Ni 81-Mo 5-Fe magnetic alloy (referred to as cryogenic permalloy). An optimized geometrical design allows cores saturation due to mechanical constraints to be avoided. The effectiveness of the design is demonstrated through electromagnetic simulations exploiting measurement results from the characterization of cryogenic permalloy samples. Moreover, a preliminary lab-scale cryogenic DCCT prototype for a nominal current of 20 kA is implemented and characterized. A typical precision of the transducer below +/-0.05% is achieved along with nonlinearity better than +/-0.05%.

引用

页数：24

共 24 条

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Performance of a fast digital integrator in on-field magnetic measurements for particle accelerators [J].