Non-electrical shimming of the magnetic field in the SINK minicyclotron AMS

Li Deming Zhang Xilin Shen Ligong Zhang Yuexiang Lu Xiangshun Chen Maobai

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Non-electrical shimming of the magnetic field in the SINK minicyclotron AMS

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- Non-electrical shimming of the magnetic field in the SINK minicyclotron AMS
- NUCLEAR TECHNIQUES Issue 10, (1992)
- 作者机构：
  
  1. 中国科学院上海原子核研究所
  2. 中国科学院上海原子核研究所,上海,201800
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Published：01 October 1992
- 稿件说明：
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[1]李德明,张锡麟,沈立功,张岳祥,卢相顺,陈茂柏.在SINR回旋加速器质谱计中磁场的非电垫补[J].核技术,1992(10):639-640.

Li Deming Zhang Xilin Shen Ligong Zhang Yuexiang Lu Xiangshun Chen Maobai. Non-electrical shimming of the magnetic field in the SINK minicyclotron AMS[J]. Nuclear techniques, 1992, (10): 639-640.
[1]李德明,张锡麟,沈立功,张岳祥,卢相顺,陈茂柏.在SINR回旋加速器质谱计中磁场的非电垫补[J].核技术,1992(10):639-640. DOI：

Li Deming Zhang Xilin Shen Ligong Zhang Yuexiang Lu Xiangshun Chen Maobai. Non-electrical shimming of the magnetic field in the SINK minicyclotron AMS[J]. Nuclear techniques, 1992, (10): 639-640. DOI：

摘要

正

我所承担的国家自然科学基金重大项目——“超灵敏小型回旋加速器质谱计研制”的目标是研制一台方便、实用、小型、低能的回旋加速器质谱计

用于

C质谱分析。该质谱计具有高的倍频次数和低的磁场强度等特点。被测粒子需在16次倍频下加速100圈左右

这对磁场的等时性提出了很高的要求。由于质谱计的小型化要求

我们采用非电垫补（即机械修正）的办法来调整磁场分布

使之满足等时性要求。在垫补的实现过程中

磁场分布的测量是一个关键的环节

要求在峰值场为0.37T的低场下

达到万分之一的测量精度。为此

需要在测量工具的制作和安装;仪器的调整及测量数据的处理方面做大量的工作。

Abstract

A non-electrical shimming of magnetic field has recently been completed in the SINR minicyclotron AMS. After shimming five times

deviation of the isochronous field is 1×10-4 -3×10-4. The accumulated maximum phase shift of the central particle is about ±10°under high harmonic operation of 16 and with turn number of 100. Amplitude of the first harmonic has been lowered down to less than 1×10-4T. It tooks only 50 minutes for the magnetic field measuring device to get a whole map of the magnetic field with 1° step.

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Institute of Low Energy Nuclear Physics, Beijing Normal University

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