A dispersion and pulse width correction algorithm for the pulsed wire method
A dispersion and pulse width correction algorithm for the pulsed wire method
复制标题
脉冲线法的色散和脉冲宽度校正算法
DOI：
10.1016/j.nima.2013.02.042
复制
发表时间：
2013
影响因子：
1.4
通讯作者：
R. Schlueter
中科院分区：
文献类型：
--
作者：
D. Arbelaez;T. Wilks;A. Madur;S. Prestemon;S. Marks;R. Schlueter
脉冲线技术是波动体测量的一种有吸引力的选择，在这种情况下，由于波动体间隙狭窄或超导波动体的低温环境等原因，测量通道受到限制。利用脉冲线技术，可以直接测量磁场的第一积分和第二积分。然而，这种技术的主要局限性之一是由于钢丝的有限弯曲刚度而引起的色散波动引起的误差。对于磁场第一积分的测量，使用有限脉冲宽度的电流脉冲也会引入误差。本文给出了脉冲线测量中频散波动的一般解。提出了一种测量色散波速的方法，并通过实验实例进行了验证。推导了一种校正第一磁场积分测量中的色散误差和有限脉宽误差以及第二磁场积分测量中的色散误差的算法。通过实验测量验证了校正算法的有效性，并与霍尔探头在短波动器上的测量结果进行了比较。
The pulsed wire technique is an attractive option for the measurement of undulators where the measurement access is restricted due to, for example, narrow undulator gaps or cryogenic environments in the case of superconducting undulators. Using the pulsed wire technique, direct measurements of the first and second integrals of the magnetic field can be obtained. However, one of the main limitations of this technique is the error introduced by dispersive wave motion, due to the finite flexural rigidity of the wire. For the measurement of the first integral of the magnetic field, an error is also introduced by the use of a current pulse with finite pulse width. In this paper, a general solution is presented for dispersive wave motion in pulsed wire measurements. A method for the measurement of the dispersive wave speed is presented and demonstrated through experimental examples. An algorithm is derived which corrects the dispersion and finite pulse-width errors in the measurement of first magnetic field integrals and the dispersion error in the measurement of second magnetic field integrals. The effectiveness of the correction algorithms is demonstrated through experimental measurements, and the results are compared with Hall probe measurements on a short undulator.