| Autor: |
C. Stinson, Y. Kang, O. Tarvainen, A. Aleksandrov, S. N. Murray, C. Piller, M. P. Stockli, Terry R Pennisi, Baoxi Han, Robert F Welton |
| Rok vydání: |
2021 |
| Předmět: |
|
| Zdroj: |
SEVENTH INTERNATIONAL SYMPOSIUM ON NEGATIVE IONS, BEAMS AND SOURCES (NIBS 2020). |
| ISSN: |
0094-243X |
| Popis: |
The U.S. Spallation Neutron Source (SNS) is a state-of-the-art neutron scattering facility delivering the world's most intense pulsed neutron beams to a wide array of instruments which are used to conduct investigations in many fields of science and engineering. Neutrons are produced by spallation of liquid Hg due to bombardment of short (∼1µs), intense (∼35 A) pulses of protons delivered at 60 Hz from a storage ring which is fed by a high-intensity, 1 GeV H− LINAC. This facility has operated almost continuously since 2006, with ion source performance increasing over those years, and currently providing 50-60 mA of H− ions with a duty-factor of 6% for maintenance-free runs of ∼120 days with near 100% availability. Ion source research and development at ORNL has played a key role in enabling and supporting these achievements: this report provides some historical highlights of this effort, describes our current ion source testing facilities, discusses the goals of the program and finally provides a snapshot of some of our ongoing R&D activities. In particular, we have recently simplified and improved the reliability of the plasma ignition gun for the external antenna ion source which is discussed in detail. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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