Abstract
Digital archives for nuclear emulsion data of past experiments, such as in cosmic-ray and accelerator physics, is being studied and prepared. Significant progress of HTS, which is an automatic read-out system for tracks recorded in emulsion, is achieving a read-out speed of about 1m2/hour and opens a possibility to read all tracks recorded in emulsion of past experiments. Current status of our first trial with RUNJOB emulsion plates is reported. Till now, the top-most 10 plates had been scanned by HTS and preliminary data is presented.
Highlights
Automatic read-out systems for those tracks in emulsion had been playing an important role in elementary particle physics, for example, contributing in the first direct observation of tau neutrino charged current interactions in the DONUT experiment [1], and in the discovery of tau neutrino appearance in the CNGS neutrino beam with the OPERA experiment [2]
A most recent system called HTS [3] is achieving read-out speeds of ∼1m2/hour making it possible to process 2000m2 of emulsion surface in one year. This value is similar to full emulsion surface of past experiments in accelerator and in cosmic-ray physics, such as ∼100m2 for DONUT, ∼120m2 for RUNJOB and ∼900m2 for JACEE
Recent developments of HTS are achieving a speed of ∼1m2/hour and it is being possible to process 2000m2 in one year. This allows us to read the full surface of emulsion plates of past experiments in accelerator and in cosmic-ray physics
Summary
A most recent system called HTS [3] is achieving read-out speeds of ∼1m2/hour making it possible to process 2000m2 of emulsion surface in one year This value is similar to full emulsion surface of past experiments in accelerator and in cosmic-ray physics, such as ∼100m2 for DONUT, ∼120m2 for RUNJOB and ∼900m2 for JACEE. As it is not so easy to have such events or phenomena recorded in emulsion again by performing new experiments, it should be interesting and valuable to read full surface of such past emulsions and perform new physics analysis from our current physics knowledge For such activities, a kind of archive for emulsion data, which is open to those who are interested, would be a suitable scheme. As a first such trial, one chamber in RUNJOB balloon experiment is being processed and the status of the trial is reported hereafter
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