The CPLEAR electromagnetic calorimeter

被引：6

作者：

Adler, R

Backenstoss, G

Bal, F

Behnke, O

Bloch, P

Damianoglou, D

Dechelette, P

Droge, M

Eckart, B

Felder, C

Fetscher, W

Fidecaro, M

Garreta, D

Gerber, HJ

Gumplinger, P

Guyon, D

Johner, HU

Lofstedt, B

Kern, J

Kokkas, P

Krause, H

Mall, U

Marin, C

Nanni, F

Pagels, B

Pavlopoulos, P

Petit, P

Polivka, G

Rheme, C

Ruf, T

Santoni, C

Schaller, LA

Schopper, A

Tauscher, L

Tschopp, H

Weber, P

Wendler, H

Witzig, C

Wolter, M

机构：

[1] UNIV BASEL,CH-4056 BASEL,SWITZERLAND

[2] CERN,CH-1211 GENEVA 23,SWITZERLAND

[3] ETH ZURICH,IPP,CH-8093 ZURICH,SWITZERLAND

[4] UNIV FRIBOURG,CH-1700 FRIBOURG,SWITZERLAND

[5] UNIV THESSALONIKI,GR-54006 THESSALONIKI,GREECE

来源：

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT | 1997年 / 390卷 / 03期

关键词：

D O I：

10.1016/S0168-9002(97)00397-5

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

A large-acceptance lead/gas sampling electromagnetic calorimeter (ECAL) was constructed for the CPLEAR experiment to detect photons from decays of pi(0)s with momentum p(pi 0) less than or equal to 800 MeV/c. The main purpose of the ECAL is to determine the decay vertex of neutral-kaon decays K-0 --> pi(0) pi(0) --> 4 gamma and K-0 --> pi(0) pi(0) pi(0) --> 6 gamma. This requires a position-sensitive photon detector with high spatial granularity in r-, phi-, and z-coordinates. The ECAL - a barrel without end-caps located inside a magnetic field of 0.44 T - consists of 18 identical concentric layers. Each layer of 1/3 radiation length (X-0) contains a converter plate followed by small cross-section high-gain tubes of 2640 mm active length which are sandwiched by passive pick-up strip plates. The ECAL, with a total of 6X(0), has an energy resolution of sigma(E)/E approximate to 13%/root E(GeV) and a position resolution of 4.5 mm for the shower foot. The shower topology allows separation of electrons from pions. The design, construction, read-out electronics, and performance of the detector are described.

引用

页码：293 / 320

页数：28

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