Low-power RF tuning of the Spallation Neutron Source warm LINAC structures
- James H.
- Gary A.
- Nathan K.
- James E.
The Spallation Neutron Source (SNS) is an accelerator-based neutron source being built at Oak Ridge National Laboratory. A conventional 402.5-MHz drift-tube linac (DTL) accelerates the H{sup -} beam from 2.5 to 86 MeV, followed by a 805-MHz coupled-cavity linac (CCL) to 186 MeV. Tuning the six DTL tanks involves adjusting post-coupler lengths and slug tuners to achieve the design resonant frequency and stabilized field distribution. A 2.5-MW klystron feeds RF power into a DTL through a ridge-loaded waveguide. The CCL consists of 4 RF modules operating in the {pi}/2 mode. Each module contains 96 accelerating cavities in 12 segments of 8 cavities each, 11 active bridge coupler cavities, and 106 nominally unexcited coupling cavities. For each RF module, power from a 5-MW klystron splits and drives bridge couplers 3 and 9. We will discuss the procedures and special tools developed for the structure tuning.
- Research Organization:
- Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
- Sponsoring Organization:
- USDOE
- OSTI ID:
- 977803
- Report Number(s):
- LA-UR-04-5527; TRN: US1003727
- Resource Relation:
- Conference: Submitted to: LINAC 2004, Luebeck, Germany, August 2004
- Country of Publication:
- United States
- Language:
- English
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