(Submitted to NIM)
A prototype electromagnetic calorimeter containing
180 litres of liquid krypton has been tested
in electron and muon beams at the CERN SPS.
The main features of this detector are its active shower medium,
a granularity of 2 cm with tower read out,
and the use of the initial current readout technique with an
effective shaping time of about 60 ns.
An energy resolution for electrons of
4.1 %/ with a constant term of 0.4 % and a
noise contribution of 50 MeV has been achieved.
The calorimeter has a spatial resolution
of 4.5 mm/ with a constant term of 0.3 mm
and a time resolution of about 0.5 ns
for energies larger than 10 GeV.
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- Figure 9 (caption "Readout cell with electronics ...")
- the label "FADC (Struck)" should read "FADC"