Abstract
Within the framework of the European Fusion Technology Programme, a cryopump system for ITER is being developed. The pumping characteristics of cryosorption panels coated with activated carbon are investigated under ITER relevant operating conditions. The underlying design of the panels described in this paper is generally accepted for the cryopump system of the ITER tokamak.
Quantitative vacuum pumping performance data are obtained by the measurement of pumping speed as a function of gas load and pumping pressure for various gases. We have investigated pure gas species (helium, protium and deuterium) and their mixtures. Our measurements have been performed to determine the major factors affecting cryopumping performance, such as flow rate, charcoal saturation, panel temperature and pressure during pumping. Selectivity of mixture pumping has been monitored by the use of a gas mass spectrometer. Dynamic loading effects due to the mobility of the molecules are also investigated. The results presented demonstrate the flexibility and assess the constraints of the recommended pump concept.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
Preview
Unable to display preview. Download preview PDF.
References
D.K. Murdoch, A. Mack, and J.-C. Boissin, Proc. 16th IAEA Fusion Energy Conference, Montreal, Canada (1996).
N. Petersohn et al., Proc. 4th Int. Symp. on Fusion Nuclear Technology, Tokyo, Japan (1997).
A. Mack et al., Fusion Technology 21:902 (1992).
D. Perinic et al., Proc. 17th Symp. on Fusion Technology, Roma, Italy (1992), p. 334.
D. Perinic, H. Haas, and A. Mack, in: “Advances in Cryogenic Engineering,” Vol. 39, Plenum Press, New York (1994), p. 1553.
S.W. Schwenterly, Proc. 7th Symp. on Engineering Problems of Fusion Research, Knoxville, TN, USA (1977), p. 1793.
H.J. Halama, H.C. Hseuh, and T.S. Chou, in: “Advances in Cryogenic Engineering,” Vol. 27, Plenum Press, New York (1982), p. 1125.
Chr. Day and A. Mack, Proc. 4th Int. Symp. on Fusion Nuclear Technology, Tokyo, Japan (1997).
Chr. Day, B. Kammerer and A. Mack. “Tests on Fast Heating for the Regeneration Process of ITER Cryopumps”, Report FZKA 5806, Forschungszentrum Karlsruhe, Germany (1996).
S.P. Ansley, G.H. Merz, and W.R. Simpson, Proc. 7th Symp. on Engineering Problems of Fusion Research, Knoxville, TN, USA (1977), p. 1801.
B.-K. Liu, J.-S. Ren, and X.-H. Cui, J. Vac. Sci. Technol. 20:1000 (1982).
P.D. Bentley, Vacuum 30:145 (1980).
M.M. Menon et al., Fusion Technology 27:355 (1995).
C. Tzemos, M. Gegenheimer and C.B. Hood Jr., in: “Advances in Cryogenic Engineering,” Vol. 31, Plenum Press, New York (1986), p. 575
K.M. Schaubel et al., Proc. 18th Symp. on Fusion Technology, Karlsruhe, Germany (1994), p. 347.
R.C. Longsworth, in: “Advances in Cryogenic Engineering,” Vol. 23, Plenum Press, New York (1978), p. 658.
Y. Oka et al., Fusion Engineering and Design 31:89 (1996).
D.W. Sedgley, T.H. Batzer, and W.R. Call, J. Vac. Sci. Technol. A 6:1209 (1988).
Chr. Day, The use of a high-resolution quadrupole gas mass spectrometer system for selective detection of helium and deuterium, accepted for publication in Vacuum.
H.C. Hseuh et al., Proc. 8th Symp. on Engineering Problems of Fusion Research, San Francisco, CA, USA (1979), p. 1568.
D.W. Sedgley et al., J. Vac. Sci. Technol. A 5:2572 (1987).
L.S. Gurevich et al., Plasma Devices and Operation 2:287 (1994).
J.R. Porter, J. Vac. Sci. Technol. A 6:1214 (1988).
J.R. Coupland et al., J. Vac. Sci. Technol. A 5:2563 (1987).
R.C. Longsworth and R.J. Webber, J. Vac. Sci. Technol. A 9:2766 (1991).
P.A. Lessard, J. Vac. Sci. Technol. A 7:2373 (1989).
Author information
Authors and Affiliations
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 1998 Springer Science+Business Media New York
About this chapter
Cite this chapter
Day, C., Kammerer, B., Mack, A. (1998). Pumping Performance of Cryopanels Coated with Activated Carbon. In: Kittel, P. (eds) Advances in Cryogenic Engineering. Advances in Cryogenic Engineering, vol 43. Springer, Boston, MA. https://doi.org/10.1007/978-1-4757-9047-4_166
Download citation
DOI: https://doi.org/10.1007/978-1-4757-9047-4_166
Publisher Name: Springer, Boston, MA
Print ISBN: 978-1-4757-9049-8
Online ISBN: 978-1-4757-9047-4
eBook Packages: Springer Book Archive