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Inelastic impacts with 0.6 m long TCP's at IR3 and IR7 |
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A new layout with 0.6
m long primary collimators instead of the originally considered
value of 0.2 m has been proposed for the betatron and momentum
cleaning insertions. This modification does not imply any
change of the LHC mechanical and optics layout because the
space allocated for the primary collimators (as of LHC optics version
V6.5) can house 0.6 m long jaws without modifications of the collimator
vacuum tank. Therefore, the It is noted that the simulations presented here have been carried out with the FULL PHASE I collimation system, including TCP's, TCS's, TCLA's, TCT's and various protection devices (TCLI's, TCDQ's, TDI). In total, 43 collimators are included. |
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"coll_summary.dat" file For each tracking simulation run, this file summarizes the number of impacts and absorptions in the various ring collimators and the average impact parameters. In addition, one can find the collimator name against the collimator numbering, as it is used in the inelastic impact files. 7 TeV (Horizontal halo - example for 200x64 tracked particles): coll_summary.hori.lowb.dat 7 TeV (Vertical halo - example for 200x64 tracked particles): coll_summary.vert.lowb.dat
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"collgaps.dat" file This files contains information on collimator gaps, angles, materials, length and local optics functions such as beta functions and beam sizes. The settings change from injection and top energy but stay the same for the various halo types (horizontal, vertical or skew). 7 TeV: collgaps.lowb.dat |
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Inelastic impact files at 7 TeV (0.6 m long TCP's) Impact files are provided for 1280000 (=(200x64)x100) tracked particles. It is
noted that the results should be rescaled with the total
number of particles absorbed in the collimators, as specified
below for each data file. The collimator number given in the first column of the impact
files corresponds to
the numbering used in the "coll_summary.dat" files and
can be used to extract the impact on a given collimator. For
example, all the impacts on the TCP.D6L7.B1 primary collimator
(number 10 in the database) can be obtained as: The provided files can be unzipped with "bunzip2". --------- New files - 17-08-2005 Summary file with collimator numbering and properties (angle, material, length, ...). 7 TeV, horizontal halo (34 MB) - Total number of absorbed protons: 1248539 (Impact summary file - H) 7 TeV, vertical halo (33 MB) - Total number of absorbed protons: 1213644 (Impact summary file - V) --------- Old files as of June 2005 (should be
equivalent, but less digits than the new files) |
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SR, Thursday, 05. April 2012 11:07 +0200 |