A PENDULUM FEEDBACK-SYSTEM TO MEASURE THE LATERAL FORCE ON A MAGNET PLACED ABOVE A HIGH-TC SUPERCONDUCTOR

被引：8

作者：

JOHANSEN, TH

BRATSBERG, H

YANG, Z

HELGESEN, G

SKJELTORP, AT

机构：

[1] Department of Physics, University of Oslo, Blindern, 0316 Oslo 3

来源：

REVIEW OF SCIENTIFIC INSTRUMENTS | 1990年 / 61卷 / 12期

关键词：

D O I：

10.1063/1.1141508

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

Based on a simple mechanical pendulum design, we developed a sensor for measurement of the horizontal force on a permanent magnet placed at any distance above a high-Tc superconductor. In this fully computerized system, which employs closed-loop feedback control, the lateral interaction with its restoring and hysteretic nature can be studied under conditions of constant vertical separation. Results are presented for the case of a small Nd-Fe-B magnet at a distance of 1 mm above a large planar disk of a YBa 2Cu3Ox superconductor.

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页码：3827 / 3829

页数：3

相关论文

共 10 条

[1] LATERAL RESTORING FORCE ON A MAGNET LEVITATED ABOVE A SUPERCONDUCTOR [J].

DAVIS, LC .

JOURNAL OF APPLIED PHYSICS, 1990, 67 (05) :2631-2636

[2] STABILITY OF MAGNETS LEVITATED ABOVE SUPERCONDUCTORS [J].

DAVIS, LC ;

LOGOTHETIS, EM ;

SOLTIS, RE .

JOURNAL OF APPLIED PHYSICS, 1988, 64 (08) :4212-4218

[3]

JOHANSEN TH, 1990, 10TH P EPS C COND MA

[4] FLUX-PENETRATION IN HIGH-TC SUPERCONDUCTORS - IMPLICATIONS FOR MAGNETIC SUSPENSION AND SHIELDING [J].

MARSHALL, DB ;

DEWAMES, RE ;

MORGAN, PED ;

RATTO, JJ .

APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING, 1989, 48 (01) :87-91

[5] DYNAMIC MAGNETIC FORCES IN SUPERCONDUCTING CERAMICS [J].

MOON, FC ;

WENG, KC ;

CHANG, PZ .

JOURNAL OF APPLIED PHYSICS, 1989, 66 (11) :5643-5645

[6] HYSTERETIC LEVITATION FORCES IN SUPERCONDUCTING CERAMICS [J].

MOON, FC ;

YANOVIAK, MM ;

WARE, R .

APPLIED PHYSICS LETTERS, 1988, 52 (18) :1534-1536

[7] A TORSION BALANCE TO MEASURE HYSTERETIC LEVITATION FORCES IN HIGH-TC SUPERCONDUCTORS [J].

WEEKS, DE .

REVIEW OF SCIENTIFIC INSTRUMENTS, 1990, 61 (01) :197-200

[8] EQUILIBRIUM OF A MAGNET FLOATING ABOVE A SUPERCONDUCTING DISK [J].

WILLIAMS, R ;

MATEY, JR .

APPLIED PHYSICS LETTERS, 1988, 52 (09) :751-753

[9] INTERACTION OF A PERMANENT-MAGNET WITH A SUPERCONDUCTING HOLLOW CYLINDER [J].

WOJTOWICZ, PJ .

JOURNAL OF APPLIED PHYSICS, 1990, 67 (11) :7154-7156

[10] INVESTIGATION OF THE INTERACTION BETWEEN A MAGNET AND A TYPE-II SUPERCONDUCTOR BY VIBRATION METHODS [J].

YANG, ZJ ;

JOHANSEN, TH ;

BRATSBERG, H ;

HELGESEN, G ;

SKJELTORP, AT .

PHYSICA C, 1990, 165 (5-6) :397-403