8 Neutrino Detectors
363
Fig. 8.13 The design of the
ProtoDUNE dual phase
prototype under test at
CERN, showing the various
components of the detector
and, in particular, the
amplification LEMs at the
anode
Anode and
Readout
Extraction
Grid
y
x
Cathode
PMT
Liquid Argon
z, time
E
G a s
Large
Electron
Multiplier
measuring the charge and momentum of electrons would be challenging due to the
short, 14 cm, radiation length of liquid argon resulting in only the first few cms being
useful for magnetic measurements.
8.3.3 Calorimeters
These detectors are well suited to investigations requiring a measure of the total
energy of an event rather than energy measurements of individual particles other
than muons.
8.3.3.1 Iron-Scintillator
The CDHS detector [91] was used in the CERN SPS neutrino beam to study
neutrino interactions in the energy range 30–300 GeV. It consisted of magnetized
iron modules built from alternating layers of iron and scintillator and separated by
drift chambers for a total of 1250 tons. Each module was constructed of circular
iron plates 3.75 m in diameter and with a 30 cm central hole for the coil insertion.
The coil consisted of 30 turns and was powered at 1000 A resulting in magnetic
field of 1.65 T on average. It was uniform to ±1.5% azimuthally and dropped by
about 20% with increasing radius. Two types of modules were used. Seven modules
used fifteen 5 cm thick plates and twelve modules used five 15 cm thick plates. The
iron plates alternated with planes of eight 45 cm wide NE110 scintillators except for
363
Fig. 8.13 The design of the
ProtoDUNE dual phase
prototype under test at
CERN, showing the various
components of the detector
and, in particular, the
amplification LEMs at the
anode
Anode and
Readout
Extraction
Grid
y
x
Cathode
PMT
Liquid Argon
z, time
E
G a s
Large
Electron
Multiplier
measuring the charge and momentum of electrons would be challenging due to the
short, 14 cm, radiation length of liquid argon resulting in only the first few cms being
useful for magnetic measurements.
8.3.3 Calorimeters
These detectors are well suited to investigations requiring a measure of the total
energy of an event rather than energy measurements of individual particles other
than muons.
8.3.3.1 Iron-Scintillator
The CDHS detector [91] was used in the CERN SPS neutrino beam to study
neutrino interactions in the energy range 30–300 GeV. It consisted of magnetized
iron modules built from alternating layers of iron and scintillator and separated by
drift chambers for a total of 1250 tons. Each module was constructed of circular
iron plates 3.75 m in diameter and with a 30 cm central hole for the coil insertion.
The coil consisted of 30 turns and was powered at 1000 A resulting in magnetic
field of 1.65 T on average. It was uniform to ±1.5% azimuthally and dropped by
about 20% with increasing radius. Two types of modules were used. Seven modules
used fifteen 5 cm thick plates and twelve modules used five 15 cm thick plates. The
iron plates alternated with planes of eight 45 cm wide NE110 scintillators except for