Commissioning and Characterization of Two Undulators at the MAX IV 3 GeV Storage Ring
(2016) EITM01 20161Department of Electrical and Information Technology
- Abstract
- Insertion devices have several undesirable effects on the beam dynamics of a synchrotron storage ring, and these must be compensated for in order to ensure long term stable operation. This master’s thesis concerns the two first insertion devices at the MAX IV facility, two in-vacuum undulators for the BioMAX and NanoMAX beamlines. The report presents the work done to neutralize closed-orbit distortions caused by the undulators using a feed-forward scheme, as well as investigations into effects on the optics, and non-linear effects on lifetime and beam size. An algorithm was developed which was able to automatically find feed-forward tables which reduced the closed-orbit distortions to noise level. This algorithm was adapted to be usable... (More)
- Insertion devices have several undesirable effects on the beam dynamics of a synchrotron storage ring, and these must be compensated for in order to ensure long term stable operation. This master’s thesis concerns the two first insertion devices at the MAX IV facility, two in-vacuum undulators for the BioMAX and NanoMAX beamlines. The report presents the work done to neutralize closed-orbit distortions caused by the undulators using a feed-forward scheme, as well as investigations into effects on the optics, and non-linear effects on lifetime and beam size. An algorithm was developed which was able to automatically find feed-forward tables which reduced the closed-orbit distortions to noise level. This algorithm was adapted to be usable for future insertion devices at MAX IV. The tune shift and beta-beat was determined to be negligible and no compensation scheme was implemented. Beam displacement measurements were attempted and found to have insufficient range, thus highlighting the need for other methods to investigate nonlinear effects in the future. (Less)
- Popular Abstract
- In the public mind, accelerators are tools of particle physicists; huge machines which collide particles in the hope of uncovering the fundamental nature of matter. A more common type of accelerator is the synchrotron light-source, where the particles are of less interest than the light they emit. The devices that produce this light, however, cause disturbances which must be neutralized.
Please use this url to cite or link to this publication:
http://lup.lub.lu.se/student-papers/record/8892021
- author
- Mikaelsson, Sara LU
- supervisor
- organization
- course
- EITM01 20161
- year
- 2016
- type
- H2 - Master's Degree (Two Years)
- subject
- keywords
- accelerator physics, MAX IV, insertion device pertubations, beam dynamics, orbit correction
- report number
- LU/LHT-EIT 2016-542
- language
- English
- id
- 8892021
- date added to LUP
- 2016-10-04 08:52:25
- date last changed
- 2016-10-05 14:57:19
@misc{8892021, abstract = {{Insertion devices have several undesirable effects on the beam dynamics of a synchrotron storage ring, and these must be compensated for in order to ensure long term stable operation. This master’s thesis concerns the two first insertion devices at the MAX IV facility, two in-vacuum undulators for the BioMAX and NanoMAX beamlines. The report presents the work done to neutralize closed-orbit distortions caused by the undulators using a feed-forward scheme, as well as investigations into effects on the optics, and non-linear effects on lifetime and beam size. An algorithm was developed which was able to automatically find feed-forward tables which reduced the closed-orbit distortions to noise level. This algorithm was adapted to be usable for future insertion devices at MAX IV. The tune shift and beta-beat was determined to be negligible and no compensation scheme was implemented. Beam displacement measurements were attempted and found to have insufficient range, thus highlighting the need for other methods to investigate nonlinear effects in the future.}}, author = {{Mikaelsson, Sara}}, language = {{eng}}, note = {{Student Paper}}, title = {{Commissioning and Characterization of Two Undulators at the MAX IV 3 GeV Storage Ring}}, year = {{2016}}, }