Herr, W.

Paper	Title	Page
TUOAKI02	CERN Neutrinos to Gran Sasso (CNGS): Results from Commissioning	692
	M. Meddahi K. Cornelis, K. Elsener, E. Gschwendtner, W. Herr, V. Kain, M. Lamont, J. Wenninger CERN, Geneva
	The CNGS project (CERN Neutrinos to Gran Sasso) aims at directly detecting muon neutrinos-tau neutrinos oscillations. An intense muon- neutrinos beam is generated at CERN and directed towards LNGS (Laboratori Nazionali del Gran Sasso) in Italy where tau-neutrinos will be detected in large and complex detectors. An overview of the CNGS beam facility is given. Results from the primary and secondary beam line commissioning performed in summer 2006 are presented. Measurements are compared with expectations.
	Slides
THPAN007	Parallel Beam-Beam Simulation Incorporating Multiple Bunches and Multiple Interaction Regions	3235
	F. W. Jones W. Herr CERN, Geneva T. Pieloni EPFL, Lausanne
	The simulation code COMBI has been developed to enable the study of beam-beam effects in the full collision scenario of the LHC, with multiple bunches interacting at multiple head-on and long-range collision points. The code is structured in a general way, allowing any number of bunches and interaction points (IP's) and procedural options for collisions, beam transport, and output of statistics and coherent mode data. The scale of this problem escalates into the parallel computing arena, and herein we will describe the construction of an MPI-based version of COMBI able to utilize arbitrary numbers of processors to support efficient calculation of multi-bunch multi-IP interactions and transport. After an overview of the basic methods and numerical components of the code, the computational framework will be described in detail and the parallel efficiency and scalability of the code will be evaluated.
THPAN071	LHC On-Line Modeling	3384
	F. Schmidt I. V. Agapov DESY, Hamburg W. Herr, G. Kruk, M. Lamont CERN, Geneva
	The LHC machine will be a very demanding accelerator with large nonlinearities to control. Particle loss in the LHC must be actively controlled to avoid damage to the machine. Therefore any relevant adjustment to the machine must be checked beforehand with a proper modeling tool of the LHC. The LHC On-Line Modeling is an attempt to provide such an analysis tool mainly based on the MAD-X code. The goal is not to provide real-time system to control LHC but rather a way to speed up off-line analysis to give results within minutes. There will be a rich spectrum of applications like closed orbit corrections, beta-beating analysis, optimization of correctors and knob settings to name a few. This report will outline how in detail the On-Line Modeling will be in embedded in the LHC control system. It will also be reported about progress in applying this analysis tool to the SPS machine and to the commissioning of the CNGS.