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PM01 |
Position Monitoring of Accelerator Components as Magnets and Beam Position Monitors
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159 |
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- G. Schmidt, E. Kasel, D. Schirmer, K. Wille
DELTA, University of Dortmund, Germany
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In third generation light sources a large amount of heat load from
synchrotron radiation must be dissipated from the vacuum chamber. The
synchrotron radiation hits the outer chamber wall and leads to a bending
of the vacuum chamber.
Due to the fact that very often beam position monitors are included into
the vacuum chamber, they start to move with increased heat load onto the
vacuum chamber.
An inexpensive and precise method to monitor this movement has been
tested at the Dortmunder Electron Test Accelerator (DELTA). Commercially
available Linear Variable Differential Transformers (LVDTs) have been
used.
In addition it was possible to demonstrate that due to the vacuum chamber
contact to quadrupole magnets the quadrupoles were moving with increasing
beam current leading to a significant orbit drift.
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