Force neutral adjustable phase undulator

Patent metadata

Field	Value
Publication number	US-12207387-B2
Application number	US-202217891769-A
Country	US
Kind code	B2
Filing date	Aug 19, 2022
Priority date	Aug 19, 2022
Publication date	Jan 21, 2025
Grant date	Jan 21, 2025

Abstract

Employing undulator devices as x-ray radiation sources requires expensive and bulky support systems for operation, which are not robust and lead to limited ranges of generated radiation energies. A force-compensated undulator device is described. The device includes an undulator having first and second magnet arrays disposed along a central axis. The first magnet array is translatable along the central axis. The device further includes a compensator unit disposed adjacent to the first magnet array with the compensator unit having a first row of magnets disposed along a compensator axis with the compensator axis being parallel to the central axis, and a second row of magnets disposed along the compensator axis. The first row of magnets is translatable along the compensator axis. The compensator provides magnetic forces that neutralize the system dynamic magnetic forces generated by the undulator.

First claim

What is claimed is:

1. A force-compensated undulator device comprising:
a first magnet array disposed along a central axis of the undulator device, the first magnet array being translatable along the dimension of the central axis;
a second magnet array disposed along the central axis, the second magnet array disposed on an opposite side of the central axis from the first magnet array with a gap distance separating the second magnet array from the first magnet array;
a compensator unit disposed adjacent to the first magnet array, the compensator unit including (i) a first row of magnets disposed along a compensator axis, the compensator axis being parallel to the central axis, and (ii) a second row of magnets disposed along the compensator axis on an opposite side of the compensator axis from the first row of magnets, and wherein the first row of magnets is translatable along the dimension of the compensator axis.

2. The undulator device of claim 1 , wherein the first row of magnets is mechanically coupled to the first magnet array and the position of the first row of magnets tracks with the position of the first magnet array.

3. The undulator device of claim 1 , wherein the first magnet array has a magnet period, and wherein the first magnet array is translatable by a distance up to half of the magnet period.

4. The undulator device of claim 1 , wherein the compensator unit provides a magnetic force in opposition to a magnetic force provided by the first and second magnet arrays, resulting in a net magnetic force of the system to be neutralized.

5. The undulator device of claim 1 , further comprising a single actuator coupled to the first magnet array, the actuator configured to control the position and movement of the first magnet array.

6. The undulator device of claim 1 , further comprising a single encoder coupled to the first magnet array, the encoder configured to measure a position and translation of the first magnet array.

7. The undulator device of claim 1 , wherein the gap profile is maintained within a 10 micron tolerance.

8. The undulator device of claim 1 , wherein the undulator device is an adjustable phase undulator.

9. A multiplexed undulator array comprising a plurality of undulator devices, the plurality of undulator devices including at least one undulator device as recited in claim 1 , each undulator device of the plurality of undulator devices having different magnetic characteristics and each undulator device physically coupled to one or more neighboring undulator devices, with at least one of the undulator devices disposed along a beam axis, and wherein each of the plurality of undulators is translatable to be disposed along the beam axis.

Assignees

• Uchicago Argonne Llc

Inventors

• Xu Joseph Z
• Qian Maofei
• Zholents Alexander A

Classifications

• H05H13/04

  Synchrotrons · CPC title

• H01S3/0959

  by an electron beam · CPC title

• H05H2007/041

  for beam bunching, e.g. undulators · CPC title

• H01S3/0903

  Free-electron laser · CPC title

• H05H7/04 Primary

  Magnet systems {, e.g. undulators, wigglers (free-electron laser H01S3/0903)}; Energisation thereof · CPC title