T0 chopper developed at KEK
T0 chopper developed at KEK
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KEK 开发的 T0 斩波器
DOI：
10.1016/j.nima.2011.09.037
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发表时间：
2012
期刊：
影响因子：
--
通讯作者：
T.Yokoo
中科院分区：
文献类型：
--
作者：
S.Itoh;K.Ueno;R.Ohkubo;H.Sagehashi;Y.Funahashi;T.Yokoo
我们在高能加速器研究机构(KEK)开发了一种T0斩波器，用于降低日本质子加速器研究综合体(J-PARC)中子散射实验中的背景噪声。T0直升机由Inconel X750制成的120公斤重的转子组成，由真空中的机械轴承支撑。电机位于真空外部，旋转通过磁封传递到真空中。马达应与脉冲中子的产生时间同步旋转。在不改变任何元件的情况下，旋转波动和运行时间均符合技术指标，相控精度小于5μS，运行时间大于4000h。开发了一种半自动安装机构，用于安装在屏蔽层下和进行维护。在此基础上，研制了J-PARC中子束流线的实机。当中子能量接近500 MeV时，我们成功地将背景噪声降低到1/30。
We developed a T0 chopper rotating at 100Hz at the High Energy Accelerator Research Organization (KEK) for the reduction of background noise in neutron scattering experiments at the Japan Proton Accelerator Research Complex (J-PARC). The T0 chopper consists of a rotor of 120kg made from Inconel X750, supported by mechanical bearings in vacuum. The motor is located outside the vacuum and the rotation is transmitted into vacuum through magnetic seals. The motor should rotate in synchronization with the production timing of pulsed neutrons. The rotational fluctuations and running time were in good agreement with the specifications, i.e., phase control accuracy of less than 5μs and running time of more than 4000h without changing any component. A semi-auto installation mechanism was developed for installing under the shielding and for maintenance purposes. Based on the result of the development, actual machines were made for the neutron beamlines at J-PARC. We successfully reduced the background noise to 1/30 at neutron energies near 500meV.
在 J-PARC RCS 中实现高功率质子束的极低抖动提取
DOI：
10.1016/j.nima.2011.05.040
发表时间：
2011
影响因子：
1.4
作者：
F. Tamura;M. Yoshii;A. Schnase;C. Ohmori;M. Yamamoto;M. Nomura;M. Toda;T. Shimada;K. Hara;K. Hasegawa
通讯作者：
K. Hasegawa
Pharos——用于材料激发非弹性中子散射研究的斩波光谱仪
影响因子：
--
作者：
R. McQueeney;R. Robinson
通讯作者：
R. Robinson