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In this note, the tertiary particle yield from secondary targets of differentmaterials placed at the 'filter' position of the H2 beam line of SPS North Areaare presented. The production is studied for secondary beams of differentmomenta in the range of 50-250 GeV/c. More specifically, we studied sixdifferent targets: two copper cylinders with a radius of 40 mm and lengths of100 and 300 mm, one solid tungsten cylinder with a radius of 40 mm and a lengthof 150 mm and three polyethylene cylinders with radius of 40 mm and lengths of550, 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 thisstudy is (a) to optimize (using the appropriate filter target) the particleproduction from the secondary targets as demanded by the experiments (b)investigate the proton production (with respect to the pion production) in theproduced tertiary beams, a fact interesting for cross-section measuringexperiments (e.g. NA61), (c) provide an expected beam-composition database foreach target and energy that will act as a reference for the test-beam users ofthe North Area and (d) demonstrate the differences between the differentGEANT-4 physics lists. Moreover this work constitutes a starting point for amore detailed benchmark of the different available Monte-Carlo models and codesin this momentum range.

Tertiary particle production and target optimization of the H2 beam line in the SPS North Area