Improvements of the pulsed-wire method to measure undulators

Requirements and limitations of the pulsed wire technique for measuring short-period long undulators’ magnetic field

“…An alternative method named pulsed wire was introduced some decades ago [1]. Although several improvements have increased the performance of the pulsed wire method since then [2,3,4,5,6,7], the Hall probe-based systems are still required to characterize undulators adequately. Hall probes can be particularly difficult to operate when measuring devices with restricted access (e.g., small gaps, in-vacuum/cryogenic environments, etc.).…”

Field integral measurement of a six period undulator in a pulsed wire set up

“…Reliable optical method [27] is reported for accurate measurement of wire sag. In the past in most cases thin wires ≤ 100μm diameter of Cu-Be are used [10][11][12][13][14][15][16][17][18][19][20][21][22]. Work on thick wire of 250μm diameter Cu-Be are reported to get negligible effect of wire imperfections on pulsed wire method [23][24][25][26].…”

“…These are rotating coil systems [1], stretched wire systems [2][3][4], Hall probe method [3][4][5][6][7][8][9] and pulsed wire methods [10][11][12][13][14][15][16][17][18][19][20][21][22][23][24][25][26][27][28][29]. In this paper we report the working principles of the pulsed wire method and discuss the novel features of both the measurement procedures and relevant physical consequences of the measurements and compare the results with the Hall probe method.…”