超导托卡马克HT-7U磁体线圈模拟长样真空压力浸渍及低温力学性能

主要通过与低温超导托卡马克HT-7U中磁体线圈同截面的长样的真空压力浸渍(VPI)实验,探索线圈进行一次成形VPI工艺的可行性,掌握压力对浸渍的影响,为真实线圈的VPI工艺提供经验,并对固化后的绝缘层取样进行低温力学性能测试。     

TU—7U纵场磁体的真空压力浸渍

主要通过模拟匝间流动试验、短样试验和长样试验等，探求低温超导托卡马克HT-7U中纵场磁体线圈的绝缘层真空压力浸渍的工艺参数，确定工艺流程，并以模型线圈试验的电性能和液氦温度下的力学性能来验证工艺参数及工艺流程的可靠性。     

HT-7U极向场磁体线圈真空压力浸渍袋模工艺的研究

为了简化低温超导托卡马克HT－7U极向场线圈真空压力浸渍的模具设计和制造，降低成本和节约时间，采用袋模工艺，本文主要介绍袋模的构成，材料的选用，并通过小样实验和等截面试样实验探索HT－7U极向场磁体线圈的绝缘层真空压力浸渍的袋模工艺的可行性。     

HT-7U纵场磁体的真空压力浸渍

主要通过模拟匝间流动试验、短样试验和长样试验等 ,探求低温超导托卡马克HT 7U中纵场磁体线圈的绝缘层真空压力浸渍的工艺参数 ,确定工艺流程 ,并以模型线圈试验的电性能和液氦温度下的力学性能来验证工艺参数及工艺流程的可靠性。     

真空浸渍技术及线圈的真空浸渍工艺

本文对真空浸渍的原理及应用作了一个简要的介绍，又着重对汽车发动机点火线圈的真空浸渍设备及工艺作了详细的阐述。     

电工产品真空处理工艺参数模拟试验装置的设计

本文介绍一种自行设计的用于电工产品真空处理工艺参数的试验装置，它可以对一些电工产品及其元件进行真空干燥，真空浸放在一个大气压力下的真空压力浸渍，可以测试各种绝缘物质的放气速率，探索浸渍前的脱水，脱气工艺参数和浸渍效果，从而确定对某种产品的最佳真空工艺参数。     

电力电容器真空干燥及压力浸渍工艺与设备的研究

传统的电力电容器的生产工艺是将芯体元件卷绕后,先在真空干燥罐内进行加热和真空干燥,然后将芯体元件压装到电容器壳内,再在另一台真空压力浸渍罐内进行真空压力浸渍.一体式的真空干燥及真空压力浸渍工艺将上述两道工艺合二为一,在同一台真空罐内进行一体式的加热、真空干燥和真空压力浸渍.本文介绍了这一工艺的研究和设备的研制.     

电机的真空压力浸渍技术与设备

真空压力浸渍是电工行业中目前应用的新技术、新工艺。本文扼要介绍真空压力浸渍成套设备的组成、作用以及真空压力浸渍的工艺过程，并通过几年的实践提出应进一 步探讨的几个问题。     

EAST极向场中心螺管线圈VPI模具设计

介绍了全超导托卡马克核聚变实验装置(EAST)极向场中心螺管线圈真空压力浸渍(VPI)模具的设计方法,叙述了模具的工作原理,对结构进行强度校核,给出计算结果.     

全膜电力电容器真空压力浸渍工艺及其设备的研究

本文介绍了真空压力浸渍的基本原理及其特点。详细地描述了全膜电力电容器真空压力浸渍的主要技术参数及其结构特点以及工艺参数的控制与选择。同时，采用矩阵位移法计算其变形；采用多层复合壁热密度计算其散热量；设计了适应气体负荷大，流导小特征的真空系统。     

Design considerations of superconducting magnets as a Maglev pad

Design considerations are made on the superconducting magnet as a Maglev pad. The superconducting magnet, called L-type because of its geometry, has two superconducting coils. One is vertically oriented for thrust and guidance, while the other is horizontally oriented for suspension, in one cryostat. The two superconducting coils are both 4 m in length, extremely long in comparison with those that have been constructed so far. Winding techniques of such long coils and structure of a cryostat meeting the contradictory requirements of light weight and solidity are discussed. One of the guiding philosophies of this project was to construct a superconducting magnet with easy operation and simple maintenance, keeping a practical train in mind. In order to meet these requirements, all operating controls, liquid helium inlet valves and current leads were located on the front panel of the cryostat.     

Design Concepts of Optimized MRI Magnet

This paper describes a simple technique to design compact air core magnets for magnetic resonance imaging (MRI). The optimum geometry is obtained by a combination of analytical and numerical methods. The technique emphasizes achieving the required field homogeneity with a shorter magnet having a minimum amount of ampere turns. The code calculates the total inductance of the set of coils, total conductor length, force, and maximum field on each coil. The code also calculates the allowable geometrical tolerance to achieve the field uniformity. The code is flexible and can be used for various geometries. Here, we present three different cases to demonstrate the efficiency of the code. First, we present the design details of a 1.5 m long 1.5 T actively shielded magnet, where the stray field is reduced to less than 4 gauss outside the sphere of radius 3.65 m using a pair of shielded coils. A total of four pairs of coils provide a field uniform to within 5.2 parts per million (ppm) within a sphere of 50 cm diameter. Calculated values of all the higher order moments lie within a few ppm. Second, we describe optimized geometry of unshielded 1.5 T symmetric magnets having three pairs of coils. Third, we optimize the geometry of a 1.2 m long 1 T asymmetric magnet having five coils. Here, the good field region starts at 20 cm from one of the edges of the magnet, providing the attending physician better accessibility to the patient. But the ampere turns and computation time required are quite large compared to a symmetric magnet.      

H-type dipole model for future plan at KEK

For the bending magnet of the electron ring of the so-called TRISTAN project at KEK, the H-type dipole, full scale model with 4 m in length, has been investigated at first to examine the feasibility to the electron storage ring from some points such as magnet performance, accessibility for the field measurement and vacuum chamber installation, manufacturing problem and magnet cost. Here, the magnet performance is treated. To measure the magnetic field inside the air gap, the specially designed flip coils were used. Fields of 11 points at the same longitudinal positions could be measured at once by rotating probe containing 11 flip coils on its axis.     

A six-tesla superconducting dipole magnet design and development program for POPAE

POPAE, the proposed Proton-Proton Intersecting Storage Ring Facility at Fermi National Accelerator Laboratory, will require some 1400 superconducting 6.0 T DC dipole and quadrupole magnets. The dipoles are 6. 17 m long and consist of coils of rectangular cross section clamped directly onto the 6 cm inner diameter bore tube. Aluminum is used to support the coils, and they are wound from a rectangular monolithic 2:1 copper to NbTi filamentary conductor. An experimental program has been undertaken to test and select the size, type and internal support scheme of the conductor. Individual coils of the POPAE dipole design, foreshortened to 0.5 m but supported similarly to the full-sized magnet are being tested in the field of a 2. 0 T backing magnet modeled after the Argonne SSR magnets. We also describe the large-scale cryogenics installation needed for the facility.     

Special Coils Development at the National High Magnetic Field Laboratory in Toulouse

The Laboratoire National des Champs Magnétiques Intenses (LNCMI) develops different types of coils suited to specific experiments. We present some recent developments on magnet design. Several coils are dedicated to experiments in large scale facilities in France and Switzerland. A 30 T split-pair coil for X-rays diffraction and one 40 T coil for plasma physics at the LULI, two 30 T coils with axial access (one with an conical bore) for X-ray diffraction and absorption experiments. A 40 T wide angle conical access solenoid with a high duty-cycle for neutron scattering at the ILL is being constructed. For use at the installation in Toulouse we have developed, apart from our standard 60 and 70 T coils, several special coils: a coil with a long optical path with 30 T transverse magnetic field and a 90 T long pulse dual coil system.     

Use of Helmholtz coils for magnetic measurements

Helmholtz coils can be used for the measurement of open-circuit magnetization of most permanent magnet materials. The author describes the physics of the measurement, lists the materials that can be measured, derives the coil constant, and derives a correction factor for the measurement of arc magnets. A measurement is made by placing the magnet at the center of the coils, and zeroing the integrating voltmeter or fluxmeter. The magnet is then removed from the coil, parallel to the coil axis, to a distance such that the sample has no influence on the reading, typically 75 to 100 cm. The open-circuit magnetization of the sample is related to the time-integrated voltage     

Magnet Design and Analysis of a 40 Tesla Long Pulse System Energized by a Battery Bank

A 40 tesla long pulse magnet and a battery bank as the power supply have been designed. This is now under construction at the Wuhan National High Magnetic Field Center. The 22 mm bore magnet will generate smooth pulses with duration 1 s and rise time 0.5 s. The battery bank consists of 945 12V/200 Ah lead-acid battery cells. The magnet and battery bank were optimized by codes developed in-house and by ANSYS. The coil was made from soft copper with internal reinforcement by fiber-epoxy composite; it is divided into two sections connected in series. The inner section consists of helix coils with each layer reinforced by Zylon composite. The outer section will be wound from copper sheet and externally reinforced by carbon fiber composite.