The Tandem Electrostatic Accelerator
The tandem accelerator is a model 25 URC accelerator built to ORNL specifications by the National Electrostatics Corporation (NEC).  The high-voltage generator, located inside a 100-ft-high, 33-ft-diameter pressure vessel, has been built in a folded configuration with both low- and high-energy acceleration tubes contained within the same column structure.  Reversal of ion direction in the high-voltage terminal is provided by a 180 degree magnet which also serves to prevent ions of unwanted charge state from being introduced into the high-energy acceleration tube.  The insulating gas used for the tandem is pure SF6.  Typical operating pressure is between 65 and 80 psig.  Today, the tandem accelerator provides acceleration for radioactive ion beams (RIBs) produced from the RIB injector.

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This page was last updated Sept. 1 2000
Send questions or comments to Ray Juras or Martha Meigs