Particle rate and host accelerator beam loss on the MICE experiment
Particle rate and host accelerator beam loss on the MICE experiment
复制标题
MICE 实验中的粒子速率和主机加速器束流损失
DOI：
10.2172/1248345
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发表时间：
2011
影响因子：
1.4
通讯作者：
A. Dobbs
中科院分区：
文献类型：
--
作者：
A. Dobbs
研究了MICE μ子束线中的粒子率及其与ISIS中产生的束流损失的关系。中微子物理的简要概述，连同讨论的中微子工厂作为MICE的动机。MICE本身的概述，然后提出，强调需要系统地了解MICE目标参数之间的关系，ISIS的光束损失，和MICE粒子率。光束损失与目标深度的变化进行了检查，并观察到非线性。在ISIS循环中，检查射束损失相对于目标浸渍时间的变化，并且观察到在ISIS注入之后，在较早的浸渍时间处拖尾之前，对于11.1 ms和12.6 ms之间的浸渍时间，射束损失的变化近似线性。还观察到，从0.05 V.ms到4.7 V.ms的光束损失的光束损失的变化遵循近似线性关系，进一步强烈的迹象表明，这继续高达7.1 V. ms。使用飞行时间数据的粒子识别被用来提供洞察到MICE光束中存在的每个粒子种类的相对丰度。μ介子速率的估计值随后作为束流损失的函数产生。在2www.example.com的水平下，对于负π → μ光学器件的3.2ms溢出，观察到每次溢出的束损失约为10：9 μ子，并且对于正π → μ光学器件的每1ms溢出约为31：1 μ子。V.ms模拟使用轨道粒子跟踪代码的ISIS环周围的束流损失分布，所造成的MICE目标，也提出了对MICE运行的影响进行了讨论。«少
A study is presented of particle rates in the MICE Muon Beamline and their relationship to beam loss produced in ISIS. A brief overview of neutrino physics is presented, together with a discussion on the Neutrino Factory as a motivation for MICE. An overview of MICE itself is then presented, highlighting the need for a systematic understanding of the relationship between the MICE target parameters, ISIS beam loss, and MICE particle rate. The variation of beam loss with target depth is examined and observed to be non-linear. The variation of beam loss with respect to the target dip time in the ISIS cycle is examined and observed to be approximately linear for dip times between 11.1 ms and 12.6 ms after ISIS injection, before tailing at earlier dip times. The variation of beam loss with particle rate is also observed to follow an approximately linear relationship from 0.05 V.ms to 4.7 V.ms beam loss, with a further strong indication that this continues up to 7.1 V.ms. Particle identification using time-of-flight data is used to give an insight into the relative abundances of each particle species present in the MICE beam. Estimates of muon rate are then produced as a functionmore » of beam loss. At a level of 2 V.ms beam loss ~10:9 muons per spill for a 3.2 ms spill with negative π → μ optics, and ~31:1 muons per 1 ms spill with positive π → μ optics are observed. Simulations using the ORBIT particle tracking code of the beam loss distributions around the ISIS ring, caused by the MICE target, are also presented and the implications for MICE running discussed.« less