  In this note, the tertiary particle yield from secondary targets of different
materials placed at the 'filter' position of the H2 beam line of SPS North Area
are presented. The production is studied for secondary beams of different
momenta in the range of 50-250 GeV/c. More specifically, we studied six
different targets: two copper cylinders with a radius of 40 mm and lengths of
100 and 300 mm, one solid tungsten cylinder with a radius of 40 mm and a length
of 150 mm and three polyethylene cylinders with radius of 40 mm and lengths of
550, 700 and 1000 mm. Eight different momenta of the secondary beam (50, 60,
70, 100, 120, 150, 200 and 250 GeV/c) as well as two different physics lists
(QGSP_BIC and FTFP_BERT) have been extensively studied. The purpose of this
study is (a) to optimize (using the appropriate filter target) the particle
production from the secondary targets as demanded by the experiments (b)
investigate the proton production (with respect to the pion production) in the
produced tertiary beams, a fact interesting for cross-section measuring
experiments (e.g. NA61), (c) provide an expected beam-composition database for
each target and energy that will act as a reference for the test-beam users of
the North Area and (d) demonstrate the differences between the different
GEANT-4 physics lists. Moreover this work constitutes a starting point for a
more detailed benchmark of the different available Monte-Carlo models and codes
in this momentum range.
