低能RHIC电子冷却器704 MHz和2.1 GHz正常导电腔的设计与测试
Design and test of 704 MHz and 2.1 GHz normal conducting cavities for Low Energy RHIC electron Cooler
摘要：
低能RHIC电子冷却器（LEReC）目前正在BNL调试，以提高RHIC的亮度低于10 GeV/核子的重离子束能量。LEReC直线加速器由直流光电电子枪、704 MHz超导射频（SRF）加速腔和三个正常导电腔组成。它被设计为提供1.6 MeV至2.6 MeV的电子束，峰-峰动量扩散dp/p小于7 e4。LEReC将使用三个正常导电腔中的两个进行能量扩散校正。单单元704 MHz腔用于能量去啁啾，三单元2.1 GHz三次谐波腔用于RF曲率校正。本文介绍了这两种谐振腔的设计和射频测试结果。
英文摘要：
The Low Energy RHIC electron Cooler (LEReC) is currently under commissioning at BNL to improve RHIC luminosity for heavy ion beam energies below 10 GeV/nucleon. The linac of LEReC consists of a DC photoemission gun, one 704 MHz superconducting radio frequency (SRF) booster cavity, and three normal conducting cavities. It is designed to deliver a 1.6 MeV to 2.6 MeV electron beam, with peak-to-peak momentum spread dp/p of less than 7e4. Two of the three normal conducting cavities will be used in LEReC for energy spread correction. A single-cell 704 MHz cavity for energy de-chirping and a three-cell 2.1 GHz third harmonic cavity for RF curvature correction. In this paper, we present the designs and RF test results of these two cavities.
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