ILC beam parameters and beamstrahlung information
Last update: 13 October, 2009
ILC Beam parameters
■ SB2009 parameter(revised: 2009/10/13)
- Documents
- CAIN: Reslts and data, using CAIN240
Note:Initial energy spread is not included. Data will be updated when SB2009 500 GeV parameter is updated.)
-
500 GeV without travelling focus
input
job log
tdr
tdr-pdf
♦Background event data (one bunch ) :
-
500 GeV with travelling focus
input
job log
tdr
tdr-pdf
♦Background event data (for one bunch ) :
More samples up to 100 bunches will be found at
-
http://greentea.kek.jp/data/soft/samples/cain/sb2009/500.wTF/[dat],[stdhep]
(Each file corresponds to one bunch of backgrounds )
-
Samples in stdhep format are also available on the GRID at
lfn:/grid/ilc/users/miyamoto/samples/gen/cain/sb2009/500.wTF/stdhep
-
Comparison of spectrum
Spectrum of differential luminosity, energy of coherent pairs,
and energy of beamstrahlung photon are compared among following
ILC beam parameters: RDR 500 nominal, RDR 500 lowP, SB2009 without
traveling focus, and SB2009 with traveling focus.
- Beamstrahlung data and function
Beamstrahlung data for BSGEN (only 500 GeV with/without traveling focus and and RDR 500 GeV nominal and lowP are available.)
(These data are also available at jlclogin2.kek.jp:/proj/soft/data5/samples/gen/bsdata or lfn:/grid/ilc/users/miyamoto/samples/gen/bsdata of ILC VO GRID)
BSGEN information
■ How to use
Example to use BSGEN will be found in the example of JSF package,
JSF/src/generators/bsgen. genbeam.C and genbeam2.C are examples
used to generate spectrum for comparison of luminosity spectrum
shown above.
For PythiaGenerator implemented in JSF, set following variables
properly.
PythiaGenerator.BeamStrahlung: 1
# 1 = to use BSGEN spectrum, 0 = not use
PythiaGenerator.BSParameter: file_name
# File name of BSDATA file. For example, 500_nominal
# in the case of nominal data at 500 GeV, 500_nominal.root
# These files must be in the directory, $JSFROOT/data/bsdata
PythiaGenerator.BSFileName: 500_nominal.root
# File name of BSDATA file. For example, 500_nominal
# in the case of nominal data at 500 GeV, 500_nominal.root
JSFBeamGeneration.Width: 0.0005
# A half width of initial beam energ spread.
# As a default, energy spread is uniform
# A value of 0.0005 corresponds to the energy spread of
# 0.1% in full width
#
■ References to the method
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Contact: akiya.miyamoto at kek.jp