Heavy Ion Storage Ring for Atomic Physics (HISTRAP) vacuum test stand for pressures of 10/sup -12/ Torr

Journal Article · Mon May 01 00:00:00 EDT 1989 · J. Vac. Sci. Technol., A; (United States)

DOI:https://doi.org/10.1116/1.575914· OSTI ID:6178071

Johnson, J W; Atkins, W H; Dowling, D T; McConnell, J W; Milner, W T; Olsen, D K

HISTRAP (Heavy Ion Storage Ring for Atomic Physics) is a proposed synchrotron/cooler/storage ring accelerator optimized for advanced atomic physics research. The ring has a circumference of 46.8 m, a bore diameter of /similar to/15 cm, and requires a vacuum of 10/sup -12/ Torr to decelerate highly charged, very heavy ions down to low energies. To be able to test components and procedures to achieve this pressure, a test stand approximately modeling 1/16 of the ring vacuum chamber has been built. The 3.5-m-long test stand has been fabricated from 10-cm-diam components, with 316LN stainless-steel flanges. Prior to assembly, these components were vacuum fired at 950 /sup 0/C at a pressure of 10/sup -4/ Torr. The test stand is bakable in situ at 300 /sup 0/C. Pumping is achieved with two 750 l/s titanium sublimator pumps and one 60 l/s ion pump. Pressure is measured with two extractor ion gauges and a 10/sup -4/ partial pressure residual gas analyser. The roughing for the test stand consists of cryosorption pumps followed by a cryopump. A pressure of 4 x 10/sup -12/ Torr has been achieved.

• Research Organization: Oak Ridge National Laboratory, Oak Ridge, Tennessee, 37831-6368
• OSTI ID: 6178071
• Journal Information: J. Vac. Sci. Technol., A; (United States), Vol. 7:3
• Country of Publication: United States
• Language: English

Related Subjects

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430400* - Particle Accelerators- Storage Rings