Numerical study of two-phase helium II stratified channel flow with inclination

Author

Yu Xiang ; Petersen, B. ; Wolff, S. ; van Sciver, S.W. ; Weisend, J.G., II.

Author_Institution

DESY, Hamburg, Germany

Volume

10

Issue

1

fYear

2000

fDate

3/1/2000 12:00:00 AM

Firstpage

1530

Lastpage

1533

Abstract

He II two-phase stratified flow is used in the proposed TeV Superconducting Linear Accelerator (TESLA) to provide cooling for about 20000 one meter long superconducting RF cavities. To meet this end, the 33 km long cryogenic system of TESLA is divided into twelve cryogenic units, first sloping two and the following 10 level ones. He II flow in the first two units is unique since it is driven by gravity rather than by hydraulic pressure. In addition to the high energy collider, the first two units will also support a Free Electron Laser (FEL) resulting in a higher heat load. Therefore, understanding the behavior of He II two-phase flow in the units with small slope under high heat load is vital to the proper functioning of the accelerator.

Keywords

accelerator RF systems; accelerator cavities; channel flow; cooling; cryogenics; electron accelerators; flow simulation; linear colliders; numerical analysis; stratified flow; superconducting cavity resonators; superfluid helium-4; two-phase flow; /sup 4/He superfluid; 1 m; 33 km; He; TESLA; TeV Superconducting Linear Accelerator; cooling; cryogenic system; electron collider; high energy collider; inclination; numerical study; superconducting RF cavities; two-phase He II stratified channel flow; Cryogenics; Free electron lasers; Friction; Gravity; Hafnium; Helium; Refrigeration;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/77.828533

Filename

828533