基于G4beamline的回旋加速器上束流传输管线束流损失计算

Beam loss monitor is used for the monitoring of beam conditions inside the vaccum beam during operation of accelerators. It can prevent the potential damage to vacuum pipes caused by misaligned beam and ensure the operating safety and help to limit the radioactive levels outside the beam pipe. Its sensitivity is strongly reliable on the its position. Thus a pre-simulation is essential to get the best position for the installation of BLM. In this paper, we calculated the beam loss distribution of A1 beam line with the sofeware G4beamline. Besides the general beam loss distribution, we also get the distribution of secondary emission electrons as well as other secondary particles. The simulation result provide the exact position for installing the beam loss monitor. The beam loss monitor installed in this position has great monitoring performance in the following experiment.