Operation of the 56 MHz superconducting RF cavity in RHIC during run 14 [electronic resource]

• Ngôn ngữ: eng
• Ký hiệu phân loại: 539 Modern physics
• 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: 7 p. : , digital, PDF file.
• Bộ sưu tập: Metadata
• ID: 268189
• Chủ đề: 1. 43 particle accelerators; 2. Beam luminosity; 3. Brookhaven rhic; 4. Mhz range 01-100; 5. Superconducting cavity resonators

Tóm tắt

A 56 MHz superconducting RF cavity was designed and installed in the Relativistic Heavy Ion Collider (RHIC). It is the first superconducting quarter wave resonator (QWR) operating in a high-energy storage ring. We discuss herein the cavity operation with Au+Au collisions, and with asymmetrical Au+He3 collisions. The cavity is a storage cavity, meaning that it becomes active only at the energy of experiment, after the acceleration cycle is completed. With the cavity at 300 kV, an improvement in luminosity was detected from direct measurements, and the bunch length has been reduced. The uniqueness of the QWR demands an innovative design of the higher order mode dampers with high-pass filters, and a distinctive fundamental mode damper that enables the cavity to be bypassed during the acceleration stage.