A preshower photon multiplicity detector for the WA98 experiment

被引：27

作者：

Aggarwal, M

Agnihotri, A

Ahammed, Z

Baba, PVKS

Badyal, SK

Bhalla, KB

Bhatia, VS

Chattopadhyay, S

Das, AC

Majumdar, MRD

Ganti, MS

Ghosh, TK

Gupta, SK

Gutbrod, HH

Kachroo, S

Kolb, BW

Kumar, V

Langbein, I

Mahapatra, DP

Mishra, GC

Mukhopadhyay, DS

Nandi, BK

Nayak, SK

Nayak, TK

Purschke, ML

Raniwala, S

Ramamurthy, VS

Rao, NK

Sambyal, SS

Trivedi, MD

Urbahn, J

Viyogi, YP ^{[1
]}

机构：

[1] Panjab Univ, Chandigarh 160014, India

[2] Univ Rajasthan, Jaipur 302004, Rajasthan, India

[3] Bhabha Atom Res Ctr, Ctr Variable Energy Cyclotron, Calcutta 700064, W Bengal, India

[4] Univ Jammu, Jammu 180001, India

[5] Gesell Schwerionenforsch GmbH, D-64220 Darmstadt, Germany

[6] Inst Phys, Bhubaneswar 751005, Orissa, India

[7] Ecole Mines, SUBATECH, F-44070 Nantes, France

来源：

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT | 1999年 / 424卷 / 2-3期

关键词：

photon multiplicity detector; quark gluon plasma; WA98; experiment; preshower detector;

D O I：

10.1016/S0168-9002(98)01417-X

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

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. (C) 1999 Elsevier Science B.V. All rights reserved.

引用

页码：395 / 413

页数：19

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