Skip to main content
SpringerLink
Log in

Achieving ultrahigh vacuum in an unbaked chamber with glow discharge conditioning

  • Published:
Pramana Aims and scope Submit manuscript

Abstract

Glow discharge conditioning (GDC) has long been accepted as one of the basic wall conditioning techniques for achieving ultrahigh vacuum in an unbaked chamber. As a part of this fundamental experimental study, a test chamber has been fabricated from stainless steel 304 L with its inner surface electropolished on which a detailed investigation has been carried out. Both helium and hydrogen gases have been employed as discharge cleaning medium. The discharge cleaning was carried out at 0.1 A /m 2 current density with working pressure maintained at 1.0 × 10 -2 mbar. It was experimentally observed that the pump-down time to attain the base pressure ~10 -8 mbar was reduced by 62% compared to the unbaked chamber being pumped to this ultimate vacuum. The results were similar irrespective of whether the discharge cleaning medium is either hydrogen or helium. It was also experimentally established that a better ultimate vacuum could be achieved as compared to theoretically calculated ultimate vacuum with the help of discharge cleaning.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Log in via an institution

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Institutional subscriptions

Figure 1
Figure 2
Figure 3
Figure 4
Figure 5

Similar content being viewed by others

References

  1. Y C Saxena and SST-1 Team, Nucl. Fusion 40, 1069 (2000)

  2. D Bora and SST-1 Team, Nucl. Fusion 43, 1748 (2003)

    Article  ADS  Google Scholar 

  3. S Pradhan and SST-1 Mission Team, J. Fusion Res. Series 9, 650 (2010)

    Google Scholar 

  4. G S Lee and et al., Nucl. Fusion 41, 1515 (2001)

    Article  ADS  Google Scholar 

  5. Wu Weiyue and et al., J. Korean Phys. Soc. 49, S14 (2006)

    Google Scholar 

  6. H Yoshikawa et al, Proceedings of the Seventh International Vacuum Congress and the Third International Conference on Solid Surfaces (Vienna, 1997) Vol. 1, pp. 12–16

  7. Minxu Li and H F Dylla, Vac. Sci. Technol. A 13, 571 (1995)

Download references

Author information

Authors and Affiliations

  1. Institute for Plasma Research, Near Indira Bridge, Bhat, Gandhinagar, 382 428, India

    ZIAUDDIN KHAN, PRATIBHA SEMWAL, KALPESH R DHANANI, DILIP C RAVAL & SUBRATA PRADHAN

Authors
  1. ZIAUDDIN KHAN
    View author publications

    You can also search for this author in PubMed Google Scholar

  2. PRATIBHA SEMWAL
    View author publications

    You can also search for this author in PubMed Google Scholar

  3. KALPESH R DHANANI
    View author publications

    You can also search for this author in PubMed Google Scholar

  4. DILIP C RAVAL
    View author publications

    You can also search for this author in PubMed Google Scholar

  5. SUBRATA PRADHAN
    View author publications

    You can also search for this author in PubMed Google Scholar

Corresponding author

Correspondence to ZIAUDDIN KHAN.

Rights and permissions

Reprints and permissions

About this article

Check for updates. Verify currency and authenticity via CrossMark

Cite this article

KHAN, Z., SEMWAL, P., DHANANI, K.R. et al. Achieving ultrahigh vacuum in an unbaked chamber with glow discharge conditioning. Pramana - J Phys 88, 12 (2017). https://doi.org/10.1007/s12043-016-1322-7

Download citation

  • Received:

  • Revised:

  • Accepted:

  • Published:

  • DOI: https://doi.org/10.1007/s12043-016-1322-7

Keywords

PACS Nos

Search

Navigation