C-Mod cryo-pump design evaluation

Author

Zaks, J. ; Vieira, R. ; Savelli, H. ; Labombard, B. ; Irby, J. ; Titus, P. ; Childs, R. ; Zhukovsky, A. ; Lipshultz, B.

Author_Institution

Plasma Sci. & Fusion Center, Massachusetts Inst. of Technol., Cambridge, UK

fYear

2003

fDate

14-17 Oct. 2003

Firstpage

62

Lastpage

65

Abstract

This paper covers in detail the design and analysis of the new cryo-pump for the Alcator C-Mod tokamak. We focus on detailing the work done to ensure that the cryopump meets all of the technical requirements for this project. In particular, the following topics will be discussed: calculation of cryo-pump pumping speed, sizing of the helium tube, boiling heat transfer of liquid helium inside the tube, cryo-pump protective shelf design/support, design of the supports for the cryo-pump and its components, heat loss thru the supports for the helium tube, number of cryo-pump sections for the ease of installation, cryogenic system design, installation procedure, experiments to qualify the new cryo pump.

Keywords

Tokamak devices; boiling; cryopumping; fusion reactor design; fusion reactor materials; heat losses; heat transfer; liquid helium; Alcator C-Mod tokamak; He; boiling heat transfer; cryo-pump pumping speed calculation; cryogenic system design; cryopump protective shelf design; cryopump protective shelf support; heat loss; helium tube sizing; installation procedure; liquid helium; Heat pumps; Heat transfer; Helium; Manufacturing; Nuclear and plasma sciences; Plasma accelerators; Plasma density; Solid modeling; Tiles; Tokamaks;

fLanguage

English

Publisher

ieee

Conference_Titel

Fusion Engineering, 2003. 20th IEEE/NPSS Symposium on

Print_ISBN

0-7803-7908-X

Type

conf

DOI

10.1109/FUSION.2003.1425878

Filename

1425878