The push to investigate ever smaller distances in high‐energy particle experiments requires the measurement of ever smaller cross sections. As a result, increasingly large solid‐angle coverage is required to attain sufficient counting rates. In most of these experiments the composite structure of hadrons is broken up at high energies, leading to very complex reactions. Such an event, with many particles emerging, usually must be observed completely, or nearly so, to yield the data necessary to perform an incisive analysis. This is another reason for a large solid angle of observation. Furthermore, it requires the ability to measure every type of particle: charged and neutral, hadronic and electromagnetic. Because the most interesting events are rare in comparison with other processes of similar appearance, as well as on an absolute scale, our ability to identify particle type turns out to be of great importance.

1.
Proceedings of the 1977 Isabelle Summer Workshop (A. Thorndike, ed.) BNL 50721;
Proceedings of the 1978 Isabelle Summer Workshop (P. Yamin, ed.) BNL 50885, Brookhaven National Laboratory, Upton, N.Y.
2.
J.
Fisher
et al.,
Nucl. Instr. Meth.
136
,
19
(
1976
).
3.
V.
Radeka
,
IEEE Trans. Nuc. Sci.
21
,
51
(
1974
);
V.
Radeka
,
P.
Rehak
,
IEEE Trans. Nuc. Sci.
25
,
46
(
1978
).
4.
A. H. Walenta, in ref. 1, BNL 50721, page 41.
5.
C.
Fabjan
et al.,
Nucl. Instr. Meth.
141
,
61
(
1977
).
6.
W. A.
Shurcliff
,
J. Opt. Soc. Am.
41
,
209
(
1951
);
R.
Garwin
,
Rev. Sci. Instr.
31
,
1010
(
1960
);
W. Selove et al., Univ of Penn. Preprint UPR‐43E, July 1978;
B.
Barrish
et al.,
IEEE Trans. Nucl. Sci.
25
,
532
(
1978
).
7.
G. M.
Garibian
,
Sov. Phys. JETP
33
,
23
(
1971
).
8.
X.
Atru
,
G.
Yodh
,
Mennessier
,
Phys. Rev. D
12
,
1289
(
1975
).
9.
J.
Cobb
et al.,
Nucl. Instr. Meth.
140
,
413
(
1977
).
10.
A.
Oganessian
,
A.
Sarkissian
,
M.
Atac
,
Nucl. Instr. Meth.
145
,
251
(
1977
).
This content is only available via PDF.
You do not currently have access to this content.