CAJ | 학술논문

12C3＋离子束在 HIRFL-CSRe 上的初步电子冷却调试
12C3＋리자속재 HIRFL-CSRe 상적초보전자냉각조시
The Fi rst Electron Cooling Commissioning of 12 C3+ Beam at HIRFL-CSRe

万方数据

原子能科学技术原子能科學技術 원자능과학기술
Atomic Energy Science and Technology
2015年 z2期 597-600 ,共4页

李杰%杨晓东%冒立军%杨建成%原有进%夏佳文%晏太来%马晓明%石健%柴伟平%殷达钰%申国栋%汶伟强

리걸%양효동%모립군%양건성%원유진%하가문%안태래%마효명%석건%시위평%은체옥%신국동%문위강

电子冷却%离化损失%残余气体%离子储存环電子冷卻%離化損失%殘餘氣體%離子儲存環
전자냉각%리화손실%잔여기체%리자저존배
electron cooling%ionization beam loss%residual gas%ion storage ring

非全裸离子在储存环内冷却储存时主要通过碰撞离化和辐射电子俘获进行损失。兰州重离子加速器（HIRFL）实验环（CSRe）调束发现，能量为122 MeV／u的12 C3＋离子束注入到CSRe后的存储寿命仅为6.6 s ，且电子冷却效果不明显。本文结合CSRe真空条件计算了12 C3＋离子束的存储寿命及其电子冷却时间，确定了CSRe平均真空度为10－8 Pa量级是导致非全裸的12 C3＋离子束存储寿命减小的主要原因，而电子冷却作用及辐射电子俘获引起的12 C3＋离子束损失被12 C3＋离子束与残余气体碰撞离化损失所掩盖，即12 C3＋离子束在未被完全冷却前便由于存储寿命过短而近乎全部损失。这解释了CSRe初步电子冷却调试中12 C3＋离子束快速损失的主要原因。
비전라리자재저존배내냉각저존시주요통과팽당리화화복사전자부획진행손실。란주중리자가속기（HIRFL）실험배（CSRe）조속발현，능량위122 MeV／u적12 C3＋리자속주입도CSRe후적존저수명부위6.6 s ，차전자냉각효과불명현。본문결합CSRe진공조건계산료12 C3＋리자속적존저수명급기전자냉각시간，학정료CSRe평균진공도위10－8 Pa량급시도치비전라적12 C3＋리자속존저수명감소적주요원인，이전자냉각작용급복사전자부획인기적12 C3＋리자속손실피12 C3＋리자속여잔여기체팽당리화손실소엄개，즉12 C3＋리자속재미피완전냉각전편유우존저수명과단이근호전부손실。저해석료CSRe초보전자냉각조시중12 C3＋리자속쾌속손실적주요원인。
The partly stripped ions get loss in storage ring when the charge state changes through collision ionization by residual gas and capturing electrons from electron beam . It was found in the first electron cooling commissioning of 12 C3+ beam at HIRFL‐CSRe that the lifetime of 122 MeV/u 12 C3+ beam is only 6.6 s shorter than expected ,and the electron cooling effect is unobvious .T he lifetime of 12 C3+ at CSRe and its electron cool‐ing time were calculated in this paper .The result shows that the vacuum pressure at the order of 10-8 Pa causes severe 12 C3+ beam loss at CSRe .T he beam loss due to recombi‐nation and cooling effect is unapparent in comparison with the one by collision ioniza‐tion .The calculation explains the accidental fast beam loss in the first electron cooling commissioning of 12 C3+ beam at CSRe .