M. Aderholz et al., A measurement of the holographic minimum-observable beam branching ratio in the FERMILAB 15-ft bubble chamber, NUCL INST A, 421(1-2), 1999, pp. 1-11
Holography has been used successfully in combination with conventional opti
cs for the first time in a large cryogenic bubble chamber. the 15-foot bubb
le chamber at Fermilab, during a physics run. The innovative system combine
d the reference beam with the object beam, irradiating a conical volume of
similar to 1.4 m(3). Bubble tracks from neutrino interactions with a width
of similar to 120 mu m have been recorded with good contrast. The ratio of
intensities of the object light to the reference light striking the him is
called the beam branching ratio. We obtained in our experiment an exceeding
ly small minimum-observable ratio of (0.54 +/- 0.21) x 10(-7). The technolo
gy has the potential for a wide range of applications. (C) 1999 Elsevier Sc
ience B.V. All rights reserved.