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A new method to correct deformations in emulsion using a precise photomask

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arxiv 1210.1344 v1 pith:R72GCTNM submitted 2012-10-04 physics.ins-det hep-ex

A new method to correct deformations in emulsion using a precise photomask

M. Kimura , H. Ishida , H. Shibuya , S. Ogawa , T. Matsuo , C. Fukushima , G. Takahashi , K. Kuge
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Y. Sato I. Tezuka S. Mikado
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classification physics.ins-det hep-ex
keywords emulsionmethodaccuracyalignmentcorrectphotomaskprecisereference
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A new method to correct the emulsion deformation, mainly produced in the development process, is developed to recover the high accuracy of nuclear emulsion as a tracking device. The method is based on a precise photomask and a careful treatment of the emulsion films. A position measurement accuracy of 0.6 {\mu}m is obtained over an area of 5 cm x 7 cm. The method allows to measure positions of track segments with submicron accuracy in an ECC brick with as few as 10 reference tracks for alignment. Such a performance can be important for hybrid emulsion experiments at underground laboratories where only a small number of reference tracks for alignment are available.

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