• R. Appleby, R.J. Hall-Wilton, D. Macina, V. Talanov
  CERN, Geneva

The TOTEM experiment at the LHC will operate at down to 10 σ from the beam in the forward region of the CMS experiment. The associated beam loss monitors (BLMs) are crucial to monitor the position of the detectors and to provide a rapid identification of abnormal beam conditions for machine protection purposes. In this paper, the response of the TOTEM BLMs is considered and the protection thresholds are defined, with calculations made of the expected signal from protons grazing the TOTEM pot as a function of pot distance from the beam, and of the BLM signal from proton collisions at the CMS beam interaction point.

• Y.I. Levinsen, H. Burkhardt
  CERN, Geneva
• V. Talanov
  IHEP Protvino, Protvino, Moscow Region

We report on background studies for the LHC with detailed simulations. The simulations now include generation of beam-gas scattering in combination with multiturn tracking of protons. Low beta optics and available aperture files for this configuration have been used to generate loss maps according to the pressure distribution in the LHC.