Influence of magnetic fields on a large-sized turbomolecular pump

Journal Article · Thu Apr 01 00:00:00 EST 1982 · J. Vac. Sci. Technol.; (United States)

DOI:https://doi.org/10.1116/1.571578· OSTI ID:5531905

Nishide, A; Kaneto, S; Ikegami, T; Sakamoto, Y

Application of turbomolecular pumps in the field of nuclear fusion research and accelerators requires knowledge concerning the temperature rise and the decrease of rotation frequency due to leakage magnetic field. We measured them for pumps OV--TH 5000 (pumping speed: 5000 l/s) and OV--TH500 (500 l/s), set in a leakage magnetic field of mirror field coils used for plasma research. The allowable magnetic field is about 100 G for both types, if we take 120 /sup 0/C to be tolerable rotor temperature. An effective magnetic shield can be realized by the use of simple permalloy cylinders.

• Research Organization: Osaka Vacuum, Ltd., Higashi-ku, Osaka 541, Japan
• OSTI ID: 5531905
• Journal Information: J. Vac. Sci. Technol.; (United States), Vol. 20:4
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
TURBOMOLECULAR PUMPS
MAGNETIC FIELDS
LEAKS
MAGNETIC MIRROR CONFIGURATIONS
MAGNETIC SHIELDING
MEDIUM TEMPERATURE
PERMALLOY
ROTORS
THERMONUCLEAR REACTORS
ALLOYS
EQUIPMENT
IRON ALLOYS
LABORATORY EQUIPMENT
MAGNETIC FIELD CONFIGURATIONS
NICKEL ALLOYS
OPEN CONFIGURATIONS
PUMPS
SHIELDING
VACUUM PUMPS
420700* - Engineering- Vacuum Engineering- (-1987)