A Preshower Photon Multiplicity Detector for the WA98 Experiment
Abstract
A high granularity preshower detector has been fabricated and installed in the WA98 Experiment at the CERN SPS for measuring the spatial distribution of photons produced in the forward region in lead ion induced interactions. Photons are counted by detecting the preshower signal in plastic scintillator pads placed behind a 3 radiation length thick lead converter and applying a threshold on the scintillator signal to reject the minimum ionizing particles. Techniques to improve the imaging of the fibre and performance of the detector in the high multiplicity environment of lead-lead collisions are described. Using Monte-Carlo simulation methods and test beam data of pi- and e- at various energies the photon counting efficiency is estimated to be 68% for central and 73% for peripheral Pb+Pb collisions.
Cite
@article{arxiv.hep-ex/9807026,
title = {A Preshower Photon Multiplicity Detector for the WA98 Experiment},
author = {M. M. Aggarwal and A. Agnihotri and Z. Ahammed and P. V. K. S. Baba and S. K. Badyal and K. B. Bhalla and V. S. Bhatia and S. Chattopadhyay and A. C. Das and M. R. Dutta Majumdar and M. S. Ganti and T. K. Ghosh and S. K. Gupta and H. H. Gutbrod and S. Kachroo and B. W. Kolb and V. Kumar and I. Langbein and D. P. Mahapatra and G. C. Mishra and D. S. Mukhopadhyay and B. K. Nandi and S. K. Nayak and T. K. Nayak and M. L. Purschke and S. Raniwala and V. S. Ramamurthy and N. K. Rao and S. S. Sambyal and B. C. Sinha and M. D. Trivedi and J. Urbahn and Y. P. Viyogi},
journal= {arXiv preprint arXiv:hep-ex/9807026},
year = {2016}
}
Comments
38 pages, 25 figures