Optical imaging of particle beams is a promising method for range and width estimations. However it was not clear that optical imaging was possible for muons. To clarify this, we conducted optical imaging of muons, since high-intensity muons are now available at J-PARC. We irradiated positive muons with different momenta to water or plastic scintillator block, and imaged using a charge-coupled device (CCD) camera during irradiation. The water and plastic scintillator block produced quite different images. The images of water during irradiation of muons produced elliptical shape light distribution at the end of the ranges due to Cherenkov-light from the positrons produced by positive muon decay, while, for the plastic scintillator block, we measured images similar to the dose distributions. We were able to estimate the ranges of muons as well as the measurement of the asymmetry of the direction of the positron emission by the muon decays from the optical images of the water, although the measured ranges were 4 mm to 5 mm larger than the calculated values. The ranges and widths of the beams could also be estimated from the optical images of the plastic scintillator block. We confirmed that optical imaging of muons was possible and is a promising method for the quality assessment, research of muons, and the future muon radiotherapy.

粒子束的光学成像是一种有希望的范围和宽度估计方法。但是，尚不清楚光学成像是否可以用于μ子。为了澄清这一点，我们进行了μ子的光学成像，因为J-PARC现在可以提供高强度μ子。我们向水或塑料闪烁体块照射了具有不同动量的正子，并在照射过程中使用电荷耦合器件（CCD）相机对其进行了成像。水和塑料闪烁体块产生的图像完全不同。在μ子辐照过程中，水的图像在该范围的末端产生椭圆形的光分布，这是由于正μ子衰减产生的正电子产生的Cherenkov光引起的，而对于塑料闪烁体，我们测量了与剂量分布相似的图像。我们能够从水的光学图像中估算出介子的范围，以及由介子衰减引起的正电子发射方向不对称性的测量，尽管测量的范围比计算出的范围大4 mm至5 mm价值观。光束的范围和宽度也可以从塑料闪烁体模块的光学图像中估算出来。我们证实，对μ子进行光学成像是可能的，并且是一种用于质量评估，μ子研究和未来μ子放疗的有前途的方法。光束的范围和宽度也可以从塑料闪烁体模块的光学图像中估算出来。我们证实，对μ子进行光学成像是可能的，并且是一种用于质量评估，μ子研究和未来μ子放疗的有前途的方法。光束的范围和宽度也可以从塑料闪烁体模块的光学图像中估算出来。我们证实，对μ子进行光学成像是可能的，并且是一种用于质量评估，μ子研究和未来μ子放疗的有前途的方法。