6 Sigma过程能力控制技术对加速器射野均匀性的评估与改进

doi:10.11889/j.0253-3219.2019.hjs.42.110202

Nuclear Techniques ›› 2019, Vol. 42 ›› Issue (11): 110202-110202.doi: 10.11889/j.0253-3219.2019.hjs.42.110202

• ACCELERATOR, RAY TECHNOLOGY AND APPLICATIONS • Previous Articles Next Articles

Evaluation and improvement of acceleratior's flatness and symmetry by six sigma capability and control technology

Xianya LI^1,²,Wenjie LIANG¹,Haiming YANG¹,Yongjing GUAN²,Shaohan SUN³,Qingguo FU¹()

1. Guangxi Medical University Affiliated Tumor Hospital, Nanning 530021, China
2. School of Physical Science and Technology, Guangxi University, Nanning 530004, China
3. Wuming Hospital of Guangxi Medical University, Nanning 530199, China

Received:2019-04-17 Revised:2019-06-18 Online:2019-11-10 Published:2019-11-18
Contact: Qingguo FU E-mail:fqg801219@163.com
About author:LI Xianya, female, born in 1991, graduated from Guangxi University with a master's degree in 2017, major in nuclear physics
Supported by:
National Natural Science Foundation of China(11665006);Guangxi Health Commission Scientific Research Project(Z20180635);Guangxi Health Commission Scientific Research Project(Z2013415)

参数 Parameter	X方向平坦度 X-flatness	X方向对称性 X-symmetry	Y方向平坦度 Y-flatness	Y方向对称性 Y-symmetry
下控制限 Lower control limit (LCL)	104.08%	100.17%	103.62%	100.17%
上控制限Upper control limit (UCL)	106.21%	101.61%	105.25%	101.48%
中值Mid-value	105.50%	100.57%	104.27%	100.61%
上规格限Upper spec limit (USL)	106%	103%	106%	103%
下规格限Lower spec limit (LSL)	100%	100%	100%	100%
过程能力指数CNPK	0.70	1.43	1.77	1.39
西格玛水平 (σ) Sigma level (σ)	3.60	5.78	6.81	5.67
合格率 Percent of pass	98.320%	99.999%	99.999%	99.997%
每百万机会缺陷数 Parts per million of defects	16 800	17	3	23

均匀性参量 Uniformity	均值 Mean value / %	标准差 Sandard deviation	准误 Accuracy error	95% 置信区间 95% confidence interval / %
X方向平坦度 X-flatness	104.85	0.148	0.027	(104.792, 104.903)
X方向对称性 X-symmetry	100.72	0.089	0.016	(100.683, 100.749)
Y方向对称性 Y-symmetry	100.51	0.134	0.024	(100.460, 100.560)
Y方向平坦度 Y-flatness	105.34	0.146	0.027	(105.283, 105.392)

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Evaluation and improvement of acceleratior's flatness and symmetry by six sigma capability and control technology

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