Trace impurity analyzer
The desirability for long-term reliability of large scale helium refrigerator systems used on superconducting accelerator magnets has necessitated detection of impurities to levels of a few ppM. An analyzer that measures trace impurity levels of condensable contaminants in concentrations of less than a ppM in 15 atm of He is described. The instrument makes use of the desorption temperature at an indicated pressure of the various impurities to determine the type of contaminant. The pressure rise at that temperature yields a measure of the contaminant level of the impurity. A LN/sub 2/ cryogenic charcoal trap is also employed to measure air impurities (nitrogen and oxygen) to obtain the full range of contaminant possibilities. The results of this detector which will be in use on the research and development helium refrigerator of the ISABELLE First-Cell is described.
- Research Organization:
- Brookhaven National Lab., Upton, NY (USA)
- DOE Contract Number:
- EY-76-C-02-0016
- OSTI ID:
- 6265043
- Report Number(s):
- BNL-25754; CONF-790327-63; TRN: 79-011477
- Resource Relation:
- Conference: IEEE particle accelerator conference, San Francisco, CA, USA, 12 Mar 1979
- Country of Publication:
- United States
- Language:
- English
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71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
HELIUM
GAS ANALYSIS
ISABELLE STORAGE RINGS
SUPERCONDUCTING MAGNETS
REFRIGERATORS
IMPURITIES
PURIFICATION
APPLIANCES
CRYOGENIC FLUIDS
ELECTRIC APPLIANCES
ELECTRICAL EQUIPMENT
ELECTROMAGNETS
ELEMENTS
EQUIPMENT
FLUIDS
GAS APPLIANCES
MAGNETS
NONMETALS
RARE GASES
REFRIGERATING MACHINERY
STORAGE RINGS
SUPERCONDUCTING DEVICES
430400* - Particle Accelerators- Storage Rings
420201 - Engineering- Cryogenic Equipment & Devices