Simulation of the ILC Collimation System using BDSIM, MARS15 and STRUCT Page: 4 of 4
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Power Losses in the 20mrad Extraction Line
O 50 100 ISO 200 250 300
Distance from IP [m]
Figure 6: Normalised power losses along the 20 mrad ex-
traction line from disrupted beam and SR. Total integrated
power of 1.68 W for 0 nm and 1.66 w for 200 nm.
Power Losses in the 2mrad Extraction Line
0 100 200 300 400 500 600
Distance from IP [m]
Figure 7: Normalised power losses along the 2 mrad ex-
traction line for 250 GeV nominal disrupted beam with no
vertical offset and SR. Total integrated power of 45.8 kW.
levels to below the set threshold for most of the suggested
machine parameter sets, but further studies must be carried
out in order to fully evaluate the effects on normal beam
transport when using this liner.
By simulating the ILC collimation system performance
with different simulation tools and performing benchmark-
ing it was possible to analyse the radiation environment in
the beam delivery system with a higher degree of confi-
dence. Both STRUCT and BDSIM codes give similar re-
sults. The performance of the upstream collimation sys-
tem and the 20 mrad extraction line is found satisfactory
whereas the radiation loads on the 2 mrad extraction line
require further optimization.
Figure 8: Beam distribution calculated with STRUCT.
Figure 9: Power deposited into scored rings of supercon-
ducting QDO in the 2mrad extraction line from Radiative
Bhabhas generated in the 250 GeV Nominal machine. Left:
power into the aluminium beam pipe. Right: first 0.5 cm
of the NbTi coils.
 I. Agapov et al., The BDSIM Toolkit, 2006, EUROTeV-
Report-2006-014 (In Review)
 N.V. Mokhov, K.K. Gudima, C.C. James et al, Recent En-
hancements to the MARS 15 Code ,Fermilab-Conf-04/053,
 A. Drozhdin and N. Mokhov, The STUCT Program User's
Reference Manual, 2005, http://www-ap.fnal.gov/~drozhdin
 ILC Baseline Configuration Document Wiki web area,
 N. V. Mokhov, A. I. Drozhdin and M. A. Kostin, "Beam col-
limation and machine - detector interface at the International
Linear Collider," FERMILAB-CONF-05-154-AD, PAC05
 T. Raubenheimer, Suggested ILC Beam Pa-
rameter Range, Feb 2005, http://www-
 J. Carter, Extraction Line Power Losses for 2, 14, and 20
mrad designs, presented at LCWS06,
 D. Schulte, Ph. D. Thesis, University of Hamburg, 1996.
 T. Maruyama and L. Keller, Energy Deposition in Supercon-
ducting QD0 from Radiative Bhabha's for 2mrad Crossing,
Presented at SLAC BDS Meeting July 2005
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Carter, J.; Agapov, I.; Blair, G.A.; Deacon, L.; /Royal Holloway, U. of London; Drozhdin, A.I. et al. Simulation of the ILC Collimation System using BDSIM, MARS15 and STRUCT, article, July 12, 2006; [Menlo Park, California]. (digital.library.unt.edu/ark:/67531/metadc891809/m1/4/: accessed December 10, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.