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TUA03PO10
Design Study of 300 MJ HTS SMES System
T. Dai, Y. Tang, J. Li, Huazhong University of Science and
Technology.
This paper outlines a systematic procedure for the design
of a toroidal coil and presents the optimum design of 300
MJ HTS magnet with finite element method. In this
optimization, both the electromagnetic and mechanical
design objects are considered. We carried out parameter
surveys of the magnetic fields and circumference stress
applied to the HTS-SMES magnets and studied a suitable
magnet dimension with low inductance and high current.
POSTER SESSION 13:30 – 15:30
FIELD MEASUREMENTS AND ANALYSES
TUA04PO01
Impacts of the Embedded Windings to the Field Quality
of Dipole
Y. He, L. Ma, S. Han, W. Liu, B. Zhang, P. Yuan, J. Xia,
Institute of modern physics of CAS.
The special C-type dipoles with embedded windings are
used in the injection beam line of HIRFL-CSR (Heavy Ion
Research Facility in Lanzhou - Cooler Storage Ring). They
act as the prototype of dipole for Experimental Ring of
CSR. The windings carrying current embedded in the
dipole poles are used to improve the field quality by
adjusting the currents value and direction. The currents are
called trimming current. The impacts of such currents on
the uniformity of field and multipole components are
carefully investigated by using two kinds of magnetic
measurements, the hall sensor and the long coil,
respectively. It is proved that the uniformity of 1.0x10-3 can
be reached easily by adjusting the magnitude of trimming
currents. At the same time, the multipoles will also be
changed. In our case, the quadrupole and sextupole
components have decreased to a low level, and the
octupole and dodecapole increased correspondingly, while
the trimming currents reach to an optimized value.
TUA04PO02
Magnetic Axis Measurement of Multipole Magnets for
CSR
Y. He, G. Cai, B. Zhang, L. Ma, W. Liu, Y. Su, S. Han, K.
Man, P. Yuan, J. Xia, Institute of modern physics of CAS.
Withdrawn.
TUA04PO03
Measurement and Analyse of Multipoles for CSRm
Y. He, B. Zhang, W. Liu, L. Ma, S. Han, S. Zhang, Y. Su, P.
Yuan, J. Xia, Institute of modern physics of CAS.
Withdrawn.
TUA04PO04
Field Measurement and Analysis of Dipole magnets for
HIRFL-CSR
Y. Su, Y. He, P. Yuan, L. Ma, W. Liu, S. Han, Q. Yao, S.
Zhang, W. Wang, Institute of Modern Physics, CAS.
Withdrawn.
TUA04PO05
A Configurable Component-Based Software System for
Magnetic Field Measurements
J.M. Nogiec, E. Desavouret, J. DiMarco, S. Kotelnikov, K.
Trombly-Freytag, D. Walbridge, FNAL.
A new software system to test accelerator magnets has
been developed at Fermilab. It employs a single wire
measurement technique and is targeted at field angle and
strength measurements. The software for the system is
built on top of a flexible component-based framework,
which allows for easy reconfiguration and run-time
modification. Various user interface, data acquisition,
analysis, and data persistence components can be
configured to form different measurement systems that are
tailored to specific requirements. The system can also be
configured with various measurement sequences or tests,
each of them controlled by a dedicated script. It is capable
of working interactively as well as executing a pre-selected
sequence of tests. Each test can be parameterized to fit
the specific magnet type or test stand requirements. The
system has been designed with portability in mind and is
capable of working on various platforms, such as Linux,
Solaris, and Windows. It can be configured to use a local
data acquisition subsystem or a remote data acquisition
computer, such as a VME processor running VxWorks. All
hardware-oriented components have been developed with
a simulation option that allows for running and testing
measurements in the absence of data acquisition
hardware.
TUA04PO06
Current distribution identification in PF-FSJS
F. Bellina, Università di Udine.
The Poloidal Field Full-Size Joint Sample (PF-FSJS) was
built and tested jointly by ENEA and CEA in 2002 at
SULTAN facility, to test two different types of full-size NbTi
multistrand cables, and to assess a possible design for the
ITER coil electrical joints. The sample was equipped with
many sensors, to measure thermal-hydraulic and
electromagnetic quantities. Among them, a set of magnetic
field measurements was taken by means of pick- up coils
located as close as possible to the cable. These signals
can be used to reconstruct the current distribution among
the main cable bundles, so that some information can be
obtained about both the current redistribution along the
cable and the effect of the non uniform electric contact
between the cable bundles and the joint/terminations. The
most common procedure of current distribution
reconstruction is based on the Singular Value
Decomposition (SVD), which has been applied to some
other actual cases by several authors, using suitable
techniques to minimise the effect of the measurement
errors. However, a number of unresolved questions are still
present as regards the procedure overall accuracy which,
in some cases, may jeopardise the reconstruction results.
Starting from its application to PF-FSJS, the paper
presents a critical review of the SVD method, analysing in
detail the procedure sensitivity, the effects of the singular
values truncation and of the most usual geometrical
approximations adopted in this types of analysis.
TUA04PO07
Analysis of the Magnetic Field in Magnetic Fluid
Acceleration Sensor
W. Yang, Q. Yang, H. Chen, S. Liu, J. Sun, W. Yan, Key
Laboratory of Electromagnetic Field and Electrical
Apparatus Reliability of Hebei University of Technology.
Magnetic fluid (MF) consists of ultrafine particles of
ferromagnetic substance dispersed steadily in solvent
using an interfacial active agent. It is a new function
material and has both liquid and magnetic properties that
make it be proper to develop many types of sensors. A
simple and attractive application of magnetic fluid is an
acceleration sensor which has good features compared to
some traditional ones. This paper presents a magnetic fluid
acceleration sensor, whose design principle is given and
MT-19 2005, Genova 62