554
K. Kleinknecht and U. Uwer
2,7 m
Protons
from SPS
K
L
Decay
K Collimator
AKS Anticounter
NOT TO SCALE !
~100m
120m
Hadron Calorimeter
Muon Veto
Beam monitor
LKr Calorimeter
Drift chamber 1
L
K
A
L
K
A
Drift chamber 2
Drift chamber 3
neutral particles
Drift chamber 4
7.2 m
1.3 m
9.2 m
5.4 m
23.4 m
10.8 m
Magnet
129.0 m
127.4 m
130.1 m
m
2
.
4
2
1
m
1
.
1
2
1
m
0
.
9
0
1
96.0 m
z
L
S
S
K
Distance to K Target
Bent
Tagging
Beam stop/
Collimators
Crystal
Detector
final
region
0.6 mrad
Hodoscope for
Hodoscope for
charged particles
S
L
K Target
S
K Target
K Collimator
NA48
DETECTORS
Fig. 9.8 Beam layout and detector in the NA48 experiment
100 GeV. The energy resolution of the calorimeter was σ E /E = (3.2 ± 0.2)%/E ⊕
(9 ± 1)%/
√
E ⊕ (0.42 ± 0.05)% where E is in GeV.
9.5.4.6 kTeV
The kTeV experiment at the 800 GeV/c Tevatron [180] uses a regeneration technique to produce the K S beam (Fig. 9.9). The K L “double beam” entered from the
left, one half continuing as K L , the other half producing a K S beam by regeneration.
The regenerator in the kTeV experiment was made of blocks of plastic scintillator.