Low-power RF tuning of the Spallation Neutron Source warm LINAC structures

Conference · Wed Dec 31 23:00:00 EST 2003

OSTI ID:977803

Deibele, C; Billen, J H ^[1]; Young, L; Vasyuchenko, A; Error, J; Gibson, P; Johnson, G A ^[2]; Bultman, N K ^[3]; Stovall, J E ^[4]; Manolitsas, J; Trompetter, D

---

1. James H.
2. Gary A.
3. Nathan K.
4. 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
• Sponsoring Organization: DOE
• OSTI ID: 977803
• Report Number(s): LA-UR-04-5527
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
CAVITIES
DESIGN
DISTRIBUTION
KLYSTRONS
LINEAR ACCELERATORS
NEUTRON SOURCES
ORNL
SPALLATION
TANKS
TUNING