Vacuum system design and tritium inventory for the charge exchange diagnostic on the Tokamak Fusion Test Reactor
The application of charge exchange analyzers for the measurement of ion temperature in fusion plasma experiments requires a direct connection between the diagnostic and plasma-discharge vacuum chambers. Differential pumping of the gas load from the diagnostic stripping cell operated at > or approx. = 10/sup -3/ Torr is required to maintain the analyzer chamber at a pressure of < or approx. = 10/sup -6/ Torr. The migration of gases between the diagnostic and plasma vacuum chambers must be minimized. In particular, introduction of the analyzer stripping cell gas into the plasma chamber having a base pressure of < or approx. = 10/sup -8/ Torr must be suppressed. The charge exchange diagnostic for the Tokamak Fusion Test Reactor (TFTR) is comprised of two analyzer systems designed to contain a total of 18 independent mass/energy analyzers and one diagnostic neutral beam rated at 80 keV, 15 A. The associated arrays of multiple, interconnected vacuum systems were analyzed using the Vacuum System Transient Simulator (Vsts) computer program which models the transient transport of multigas species through complex networks of ducts, valves, traps, vacuum pumps, and other related vacuum system components. In addition to providing improved design performance at reduced costs, the analysis yields estimates for the exchange of tritium from the torus to the diagnostic components and of the diagnostic working gases to the torus.
- Research Organization:
- Princeton University, Plasma Physics Laboratory, Princeton, New Jersey 08544
- DOE Contract Number:
- AC02-76CH03073
- OSTI ID:
- 6154276
- Journal Information:
- J. Vac. Sci. Technol., A; (United States), Vol. 4:1
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
PLASMA DIAGNOSTICS
BEAM ANALYZERS
ELECTROSTATIC ANALYZERS
VACUUM SYSTEMS
TFTR TOKAMAK
TRITIUM
MATERIALS HANDLING
COMPUTERIZED SIMULATION
DESIGN
OPTIMIZATION
ATOMIC BEAMS
CHARGE EXCHANGE
COST
ENERGY ANALYSIS
ENERGY SPECTRA
ION TEMPERATURE
MASS SPECTROSCOPY
PERFORMANCE
BEAMS
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
HYDROGEN ISOTOPES
ISOTOPES
LIGHT NUCLEI
NUCLEI
ODD-EVEN NUCLEI
RADIOISOTOPES
SIMULATION
SPECTRA
SPECTROSCOPY
THERMONUCLEAR REACTORS
TOKAMAK TYPE REACTORS
YEARS LIVING RADIOISOTOPES
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