TITLE

New printed circuit boards magnetic coils in the vacuum vessel of J-TEXT tokamak for position measurement

AUTHOR(S)
Qiu, S. S.; Zhuang, G.; Zhang, M.; Xia, D. H.; Rao, B.; Zhang, X. Q.; Pan, Y.; Gentle, K.
PUB. DATE
October 2010
SOURCE
Review of Scientific Instruments;Oct2010, Vol. 81 Issue 10, p10E125
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Four sets of magnetic diagnostic coils, which are printed on machinable ceramic printed circuit boards (PCB), are designed, fabricated, installed, and tested in the Joint Texas Experimental Tokamak (J-TEXT) vacuum vessel for detecting the plasma radial and vertical displacements relative to the geometric center of the vacuum vessel in Ohmic discharges. Each coordinate is determined by a pair of variable cross-section Rogowski and saddle coils, which measure the tangential and normal magnetic fields (relative to the coil surface). These coils are suitable for mass production and offer advantages in vacuum compatibility and temperature tolerance that are important for J-TEXT. Position measurements using PCB coils are compared with those from soft x-ray image system and match the position well.
ACCESSION #
54858047

 

Related Articles

  • Protecting Board Integrity in Harsh Environments. Byrne, J. Patrick; Stampe, Tim // SMT: Surface Mount Technology;Oct2005, Vol. 19 Issue 10, p32 

    The article examines the advantages and disadvantages of using air abrasion to handle the rework, evaluation and repair of surface mount technology board components used in harsh environments. Microabrasive blasting which offers a wide range of abrasive media in micron sizes is conducted in a...

  • Determination of radial location of rotating magnetic islands by use of poloidal soft x-ray detector arrays in the STOR-M tokamak. Dreval, M.; Xiao, C.; Elgriw, S.; Trembach, D.; Wolfe, S.; Hirose, A. // Review of Scientific Instruments;May2011, Vol. 82 Issue 5, p053503 

    A technique is presented for determining the radial location of the rotating magnetic islands in the STOR-M tokamak by use of soft x-ray (SXR) detector arrays. The location is determined by examining the difference in the integrated SXR emission intensities through two adjacent lines of sight. A...

  • Influence of an external magnetic field on the switching mode of a compact triggered vacuum gap. Asiunin, V.; Davydov, S.; Dolgov, A.; Pshenichniy, A.; Yakubov, R. // Instruments & Experimental Techniques;Jan2015, Vol. 58 Issue 1, p70 

    The possibility of excluding the binding of discharge cathode spots in a small-size pulse vacuum gap by placing the latter in a magnetic field is shown. The probable physical mechanism of this phenomenon is presented.

  • Diagnostic applications of the TFTR XIS system. McGuire, K.; Colchin, R. J.; Fredrickson, E.; Hill, K.; Johnson, L. C.; Morris, W.; ParĂ©, V.; Sauthoff, N.; von Goeler, S. // Review of Scientific Instruments;Aug1986, Vol. 57 Issue 8, p2136 

    The horizontal x-ray imaging system (XIS) on the tokamak fusion test reactor (TFTR) tokamak is an array of 64 silicon surface-barrier x-ray diodes, with a 2.5-cm spatial resolution. The XIS system is primarily used to study magnetohydrodynamic (MHD) instabilities, but has also been used to...

  • TFTR vertical x-ray imaging system. Johnson, L. C.; Bitter, M.; Chouinard, R.; von Goeler, S.; Hill, K. W.; Liew, S.-L.; McGuire, K.; ParĂ©, V.; Sauthoff, N. R.; Young, K. M. // Review of Scientific Instruments;Aug1986, Vol. 57 Issue 8, p2133 

    A vertically viewing x-ray imaging system (XIS) has been designed to complement the existing 64-channel horizontal system on the tokamak fusion test reactor (TFTR) and enhance measurements of soft x-ray emissivity, plasma (major) radial position, and magnetohydrodynamic (MHD) phenomena. System...

  • Ultrasoft x-ray imaging system for the National Spherical Torus Experiment. Stutman, D.; Finkenthal, M.; Soukhanovskii, V.; May, M.J.; Moos, H.W.; Kaita, R. // Review of Scientific Instruments;Jan1999, Vol. 70 Issue 1, p572 

    Describes the design of a spectrally resolved ultrasoft x-ray imaging system composed of arrays of high resolution and throughput miniature monochromators and based on multilayer mirrors and absolute photodiodes for the National Spherical Torus (ST) Experiment. Focus on magnetohydrodynamic...

  • X-ray Inspection.  // SMT: Surface Mount Technology;Dec2005, Vol. 19 Issue 12, p35 

    The article evaluates the surface mount technology version of the COUGAR-VXP X-ray inspection system from FEINFOCUS and offers information about its special components and technological capabilities.

  • Signal Integrity: Field cancellation. Johnson, Howard // EDN Europe;Apr2011, Vol. 58 Issue 4, p29 

    The article offers information on pattern of magnetic fields surrounding one microstrip trace on a typical printedcircuit board (PCB). It states that in a singled-ended system, outgoing current on the trace stimulates an equal and opposite current returning to its source through the power and...

  • Soft x-ray array system with variable filters for the DIII-D tokamak. Hollmann, E. M.; Chousal, L.; Fisher, R. K.; Hernandez, R.; Jackson, G. L.; Lanctot, M. J.; Pidcoe, S. V.; Shankara, J.; Taussig, D. A. // Review of Scientific Instruments;Nov2011, Vol. 82 Issue 11, p113507 

    Recent upgrades to the soft x-ray (SXR) array system on the DIII-D tokamak are described. The system consists of two 32-channel arrays at one toroidal location and three toroidally distributed 12-channel arrays. The 32-channel arrays have been completely rebuilt to allow the switching of SXR...

Share

Read the Article

Courtesy of VIRGINIA BEACH PUBLIC LIBRARY AND SYSTEM

Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics