Development of a Prototype Electro-Optic Beam Position Monitor at the CERN SPS
- Arteche, Alberto
- Bosco, Alessio
- Chritin, Nicolas
- Draskovic, Drasko
- Gibson, Stephen
- Lefèvre, Thibaut
- Levens, Thomas
DOIAbstract
A novel electro-optic beam position monitor capable of rapidly (<50ps) monitoring transverse intra-bunch perturbations is under development for the HL-LHC project. The EO-BPM relies on the fast optical response of two pairs of electro-optic crystals, whose birefringence is modified by the passing electric field of a 1ns proton bunch. Analytic models of the electric field are compared with electromagnetic simulations. A preliminary opto-mechanical design of the EO-BPM was manufactured and installed at the CERN SPS in 2016. The prototype is equipped with two pairs of 5mm cubic LiNbO3 crystals, mounted in the horizontal and vertical planes. A polarized CW 780nm laser in the counting room transmits light via 160m of PM fibre to the SPS, where d...
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