PERFORMANCE OF THE HEXAGONAL CALORIMETER AT PEP-4

Aihara, H.; Alston-Garnjost, M.; Badtke, D.H.; Bakken, J.A.; Barbaro-Galtieri, A.; Barnes, A.V.; Barnett, B.A.; Blumenfeld, Barry J.; Bross, A.; Buchanan, C.D.

doi:10.1016/0167-5087(83)90145-X

PERFORMANCE OF THE HEXAGONAL CALORIMETER AT PEP-4

TPC/Two Gamma

Collaboration

•

H. Aihara
(
- Yale U.
)

1983

6 pages

Published in:

Nucl.Instrum.Meth. 217 (1983) 259-264

DOI:

10.1016/0167-5087(83)90145-X

Experiments:

SLAC-PEP-004

reference search31 citations

Citations per year

Abstract: (Elsevier)

A Geiger-mode electromagnetic shower calorimeter has been constructed for PEP-4. Six trapezoidal modules cover 75% of 4 π solid angle in a hexagonal array. Each module contains 40 sense wire planes between 0.25 radiation-length thick lead-laminates, and is divided electrically into submodules of 27 and 13 layers. Half-degree wide hodoscopic channels in projective geometry provide excellent spatial resolution. In each gap three stereo views using the sense wires as well as strips on both cathodes at ±60° to the wires provide good shower reconstruction capabilities in multi-track jet events. Calibration and data analysis procedures are outlined. The performance of the calorimeter in the measurement of Bhabha events and the reconstruction of π 0 's in jet events is in excellent agreement with Monte Carlo simulations. The π 0 mass resolution is MeV (rms).

TALK
CALORIMETER
SHOWERS: ELECTROMAGNETIC
ENERGY: MEASUREMENT
CALIBRATION
TRACK DATA ANALYSIS
SHOWER DETECTOR: PERFORMANCE
SHOWER DETECTOR: SPATIAL RESOLUTION
SHOWER DETECTOR: ENERGY RESOLUTION

References(4)

Figures(0)

[1]

-15030 and Nucl. Instr. and Meth. (in press)

A. Barbaro-Galtieri

[2]

H. Aihara

- IEEE Trans.Nucl.Sci. NS-30 (1983) 117

[3]

M. Nakamura

- Nucl.Instrum.Meth. 157 (1978) 591

[4]

unpublished

R.L. Ford
,
W.R. Nelson