A Suitable Material for the Substrate of Micro-Strip Gas Chamber

  • Micro-strip Gas Chamber (MSGC) used as a position sensitive detector has perfect performances in the detection of nuclear irradiations. However, it encounters a severe problem, that is, positive charge accumulation which can be avoided by reducing the surface resistivity of insulating substrate. So, diamond-like carbon (DLC) film is coated on D263 glass to modify its electrical properties as substrate for MSGC. Raman spectroscopy demonstrates that DLC film is of sp3(σ bonding) and sp2 bonding (π bonding), and therefore it is a type of electronically conducting material. It also reveals that the film deposited on D263 glass possesses very large of sp3 content and consequently is a high quality DLC film. I-V plots indicate that samples with DLC film enjoy very steady and suitable resistivities in the range of 109—1012Ω·cm. C-F characteristics also show that samples coated by DLC film have low and stable capacitance with frequency. These excellent performances of the new material, DLC film/D263 glass, meet the optimum requirements of MSGC. DLC film/D263 glass used as the substrate of MSGC should effectively avoid the charge pile-up effect and substrate instability and then improve its performances.
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  • [1] . Charpak G et al. Nucl . Instrum. Methods, 1968, A62: 2352. Oed A. Nucl. Instrum. Methods, 1988, A263: 3513. Bouhali O et al. Nucl . Instrum. Methods, 1996, A378: 4234. Bishai M R et al. Nucl. Instrum. Methods, 1997, A400: 2335. Cicoqnani G et al. Nucl. Inst rum. Methods, 1998, A416: 2636. Schmidt S et al. Nucl. Inst rum. Methods, 1994, A344: 5587. YU Zhong-Qiang et al. HEP NP. , 1996, 20( 8) : 6788. ZHANG Ming-Long, XIA Yi-Ben, WANG Lin-Jun. Nucl . Elect r. Det ec. Tech. , 2003, 23( 2) : 1139. Teo K B K et al. Diam. Relat . Mater. , 2002, 11: 108610. Nemanich R J, Lucovsky G, Solin S A. Sol. Stat . Com. , 1977, 23:11711. Meenakshi V, Sayeed A, Subramanyam S V. Mat er. Sci. For. , 1996,223- 224: 30712. Shimakawa K, Miyake K. Phys. Rev. , 1989, B39: 757813. Mack V et al. Nucl. Instrum. Methods, 1995, A367: 173
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ZHANG Ming-Long, XIA Yi-Ben, WANG Lin-Jun and ZHANG Wei-Li. A Suitable Material for the Substrate of Micro-Strip Gas Chamber[J]. Chinese Physics C, 2004, 28(4): 408-411.
ZHANG Ming-Long, XIA Yi-Ben, WANG Lin-Jun and ZHANG Wei-Li. A Suitable Material for the Substrate of Micro-Strip Gas Chamber[J]. Chinese Physics C, 2004, 28(4): 408-411. shu
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Received: 2003-06-27
Revised: 1900-01-01
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A Suitable Material for the Substrate of Micro-Strip Gas Chamber

    Corresponding author: ZHANG Ming-Long,
  • School of Materials Science & Engineering,Shanghai University,Shanghai 201800,China

Abstract: Micro-strip Gas Chamber (MSGC) used as a position sensitive detector has perfect performances in the detection of nuclear irradiations. However, it encounters a severe problem, that is, positive charge accumulation which can be avoided by reducing the surface resistivity of insulating substrate. So, diamond-like carbon (DLC) film is coated on D263 glass to modify its electrical properties as substrate for MSGC. Raman spectroscopy demonstrates that DLC film is of sp3(σ bonding) and sp2 bonding (π bonding), and therefore it is a type of electronically conducting material. It also reveals that the film deposited on D263 glass possesses very large of sp3 content and consequently is a high quality DLC film. I-V plots indicate that samples with DLC film enjoy very steady and suitable resistivities in the range of 109—1012Ω·cm. C-F characteristics also show that samples coated by DLC film have low and stable capacitance with frequency. These excellent performances of the new material, DLC film/D263 glass, meet the optimum requirements of MSGC. DLC film/D263 glass used as the substrate of MSGC should effectively avoid the charge pile-up effect and substrate instability and then improve its performances.

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