The LCLS-II LLRF System [electronic resource]

• Ngôn ngữ: eng
• Ký hiệu phân loại: 621.395 Circuitry
• Thông tin xuất bản: Washington, D.C. : Oak Ridge, Tenn. : United States. Dept. of Energy. Office of Science ; Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy, 2015
• Mô tả vật lý: Size: 3 p. : , digital, PDF file.
• Bộ sưu tập: Metadata
• ID: 268199
• Chủ đề: 1. 43 particle accelerators; 2. Amplifiers; 3. Electric motors; 4. Stanford linear accelerator center; 5. Superconducting cavity resonators

Tóm tắt

 The SLAC National Accelerator Laboratory is planning an upgrade (LCLS-II) to the Linear Coherent Light Source with a 4 GeV CW superconducting (SCRF) linac. The SCRF linac consists of 35 ILC style cryomodules (eight cavities each) for a total of 280 cavities. Expected cavity gradients are 16 MV/m with a loaded Q<
 sub>
 L<
 /sub>
  of ~ 4x10<
 sup>
 7<
 /sup>
 . The RF system will have 3.8 kW solid state amplifiers driving single cavities. To ensure optimum field stability a single-source single-cavity control system has been chosen. It consists of a precision four-channel cavity receiver and RF stations (Forward, Reflected and Drive signals). In order to regulate the resonant frequency variations of the cavities due to He pressure, the tuning of each cavity is controlled by a Piezo actuator and a slow stepper motor. In addition the system (LLRF-amplifier-cavity) is being modeled and cavity microphonic testing has started. This paper describes the LLRF system under consideration, including recent modeling and cavity tests.