Paper 
Title 
Page 
THPMN063 
CTF3 Combiner Ring Commissioning

2850 

 F. Tecker, R. Corsini, S. Doebert, P. K. Skowronski, P. Urschutz
CERN, Geneva
 C. Biscari, A. Ghigo
INFN/LNF, Frascati (Roma)
 E. Bressi
CNAO Foundation, Milan
 A. Ferrari
UU/ISV, Uppsala



CLIC Test Facility 3 (CTF3) has the objective to demonstrate the remaining feasibility issues of the CLIC twobeam technology for a future multiTeV linear collider. One key issue is the efficient generation of a very high current 'drive beam' that serves as the power source for the acceleration of the main beam to high energy. This large current beam is produced by interleaving bunches in a combiner ring using transverse deflecting RF cavities. The 84 m long CTF3 combiner ring and the connecting transfer line have been recently installed and put into operation. The latest commissioning results will be presented.


THPAN070 
Advances in MADX using PTC

3381 

 F. Schmidt, P. K. Skowronski
CERN, Geneva
 E. Forest
KEK, Ibaraki



For the last few years the MADX program makes use of the Polymorphic Tracking Code (PTC) to perform calculations related to beam dynamics in the nonlinear regime. An important new feature is the extension of the matching module to allow fitting of nonlinear parameters to any order. Moreover, calculations can now be performed with parameter dependence defined in the MADX input. In addition, the user can access the PTC routines for the placement of a magnet with arbitrary position and orientation. This facilitates the design of nonstandard lattices, in particular since a 3D visualization of a lattice is now available. For the LHC studies during commissioning it is of special interest that one has access to within the thick PTC elements which allows e.g. to find PTC Twiss parameters at any point in the ring. Lastly, the beambeam element has been added to PTC to complete the set of elements available in MADX proper.

