LHC MD 3205: Beam Screen Shielding from QH Discharge at 70 K

This note summarises the results of LHC Machine Development (MD) 3205, performed on October 31st 2018. During the MD, the quench heaters of the magnet MB.C28L5 were fired while three nominal bunches were circulating in each of the two rings. The resulting vertical kicks on the beams were reconstructed based on the measured beam positions at the ADT ObsBox. Fast rise times of around 100 µs were observed. The first test was performed during the ramp at a beam energy of 3.46 TeV, and the second test at top energy (6.5 TeV). For both tests, the beam screen in the cell 28L5 had been warmed up to approximately 70 K.