Experiment Proposal - opera - Infn

More documents

Recommendations

Info

Figure 163: Spectrum of one channel near the trigger pixel for two different light yields. The photoelectrons peaks are clearly visible. A gloabl fit has been applied to the data. The peaks are fitted with a Gaussian and the photoelectron peaks are fitted with a Poisson distribution. The mean number of photoelectrons is around 0.9 in the left plot and 1.3 in the right one. 220
A complete system has been designed to test the M64 PMT’s (its schematic is given in Section 4.4.3). The front end electronics of this system is a two stage circuit (Fig. 164). The first one uses the differential amplifier AD8138 which provides a fixed gain of 4, while the second stage has an adjustable gain of up to 5 and a buffer (BUF601) which transmits the signal to the ADC. Between the two stages, a splitting system can also provide an output for an electronic discriminator. Stage 1 Stage 2 from PMT AD8138 OPA660 BUF601 to ADC 50 ohms Gain = 5 Gain = 1 to 4 to discriminator Figure 164: Schematic view of the front end electronics used for the PMT tests. Acquisition Rack RIO2 (1) CAENET CBD (2) VME crate PC Linux Ethernet ADC (3) ADC (3) ADC (3) Controller CAMAC crate Test system Poste de travail Ampli (4) Ampli (4) Ampli (4) Gate - Trig HV NIM crate Analog signals PMT x Control -Trigger & High Voltage y (1) : CES VME processor card (RIO2 8062) based on PowerPC 604e (2) : CBD (CAMAC Branch Driver) (3) : ADC Lecroy 2249 W (4) : Amplifier card developed at IReS Figure 165: Schematic view of the acquisition system used for the PMT tests. The charge measurement is done by a Lecroy CAMAC ADC 2249W. The data readout and the setup of the acquisition is controlled by a VME processor and a VME CBD (Fig. 165). The data flow, data recording and run control are managed by the CASCADE software [92]. The processor controls the 221
Page 1 and 2:
CERN/SPSC 2000-028 SPSC/P318 LNGS P
Page 3 and 4:
N. Bruski, S. Buontempo, F. Carbona
Page 5 and 6:
Contents 1 Introduction 5 1.1 Physi
Page 7 and 8:
6.7.1 Multiple scattering analysis
Page 9 and 10:
1 Introduction In this document we
Page 11 and 12:
eactor experiments (KAMLAND [22], B
Page 13 and 14:
difference being the nature of the
Page 15 and 16:
The total energy of electrons and
Page 17 and 18:
through the decay topology and its
Page 19 and 20:
Figure 6: Simulated ν τ event wit
Page 21 and 22:
particles above 10 MeV . One can se
Page 23 and 24:
vertex position as predicted by the
Page 25 and 26:
• stability and maintenance: no p
Page 27 and 28:
Figure 11: Illustration of the vari
Page 29 and 30:
Table 3: Expected numbers of τ and
Page 31 and 32:
3 The CNGS neutrino beam 3.1 The be
Page 33 and 34:
per year of operation because the S
Page 35 and 36:
ν µ at GS (p.o.t. GeV m 2 ) -1 10
Page 37 and 38:
Figure 19: Generated (continuous li
Page 39 and 40:
Emulsion Film + 56 (Lead + Emulsion
Page 41 and 42:
The mechanical properties of the fi
Page 43 and 44:
Figure 24: Film thickness distribut
Page 45 and 46:
contact at different temperature an
Page 47 and 48:
Figure 27: Photograph of a minimum
Page 49 and 50:
entry : 85 RMS: 0.060 15 10 5 0 0 d
Page 51 and 52:
[micron] 2 1 0 -1 -2 [micron] 2 1 0
Page 53 and 54:
een searching for old emulsion plat
Page 55 and 56:
Figure 33: Thickness distribution f
Page 57 and 58:
Figure 35: RMS distribution of 472
Page 59 and 60:
Figure 37: Wall support structure.
Page 61 and 62:
ensures a well defined brick positi
Page 63 and 64:
Figure 41: Detail of the brick mani
Page 65 and 66:
The strips are 6.7 m long, 2.6 cm w
Page 67 and 68:
the effective maximal length (for p
Page 69 and 70:
Table 7: Characteristics of the 64-
Page 71 and 72:
photomultiplier to be tested diaphr
Page 73 and 74:
modate from 512 up to 5180 fibres.
Page 75 and 76:
The fast shaper has a high gain in
Page 77 and 78:
The Ethernet capable device provide
Page 79 and 80:
R&D already performed by the MINOS
Page 81 and 82:
Figure 54: Isometric view of the di
Page 83 and 84:
Figure 56: Magnetic field distribut
Page 85 and 86:
RPC layout 8.00 m 8.75 m Figure 58:
Page 87 and 88:
formance, it is presently foreseen
Page 89 and 90:
Figure 61: Drift plane arrangement
Page 91 and 92:
Figure 63: Schematic view of a XPC
Page 93 and 94:
Figure 64: Acceleration spectrum fo
Page 95 and 96:
Figure 65: The OPERA detector shown
Page 97 and 98:
Table 9: Number of electronic chann
Page 99 and 100:
Adjustable gain Channel 0 Sample &
Page 101 and 102:
Trigger OUT IN Discri. Time Ref. PP
Page 103 and 104:
Super Module 1 Super Module 2 Super
Page 105 and 106:
5 Analysis of the electronic detect
Page 107 and 108:
Track segments on both the emulsion
Page 109 and 110:
5.5 Brick finding efficiency The se
Page 111 and 112:
Wall finding efficiency 1 0.95 0.9
Page 113 and 114:
The worst case leading to the lowes
Page 115 and 116:
electromagnetic showering events an
Page 117 and 118:
Studies on the strategies have star
Page 119 and 120:
which may enter in such a compariso
Page 121 and 122:
Figure 84: The total brick finding
Page 123 and 124:
Figure 86: Charge determination of
Page 125 and 126:
Figure 89: Muon momentum resolution
Page 127 and 128:
Figure 91: Muon momentum resolution
Page 129 and 130:
Reconstructed Pion Energy N Analog
Page 131 and 132:
Figure 98: The difference between r
Page 133 and 134:
By using the above running modes of
Page 135 and 136:
µm EXP.: DONUT 3039/01910 MOD.:ECC
Page 137 and 138:
emulsion film plastic foils and edg
Page 139 and 140:
200micron base 50micron emulsion la
Page 141 and 142:
Figure 106: Tracking efficiency of
Page 143 and 144:
a base track on film 2 a penetratin
Page 145 and 146:
Long decays, defined as a decay top
Page 147 and 148:
more than 60 views/s recognising al
Page 149 and 150:
Table 12: Basic numbers used to des
Page 151 and 152:
an area that one S-UTS can process
Page 153 and 154:
unit cell L=1300micron Pb plate ( 1
Page 155 and 156:
We recall that the intrinsic positi
Page 157 and 158:
Figure 116: The top histograms show
Page 159 and 160:
The error on θ S due to both the s
Page 161 and 162:
Figure 120: Fraction of pions which
Page 163 and 164:
#1 #2 #3 #4 #5 γ γ ∆θ 4= |θ 5
Page 165 and 166:
Figure 124: Energy resolution for e
Page 167 and 168:
Figure 126: Efficiency for γ’s t
Page 169 and 170:
7 Physics performance 7.1 Electron
Page 171 and 172:
7.2 Muon identification efficiency
Page 173 and 174: Table 13: Muon identification effic
Page 175 and 176: Table 14: Brick finding efficiency
Page 177 and 178: The second result is obtained from
Page 179 and 180: Figure 134: Brick-to-brick connecti
Page 181 and 182: Figure 136: Distribution of τ deca
Page 183 and 184: For long decays the overall efficie
Page 185 and 186: The φ angle is expected to peak at
Page 187 and 188: Table 19: Summary of the kinematica
Page 189 and 190: known. Because of these uncertainti
Page 191 and 192: Table 21: Expected charm background
Page 193 and 194: π− e+ γ e- e+ e- γ π− Figur
Page 195 and 196: Table 24: Estimates of the rate of
Page 197 and 198: Table 27: Expected numbers of τ an
Page 199 and 200: Table 28: Sensitivity at the 90% CL
Page 201 and 202: 7.6 Determination of the oscillatio
Page 203 and 204: measurement of the ratio between ν
Page 205 and 206: Table 30: Neural network recognitio
Page 207 and 208: (mrad) 0.04 0.02 0 -0.02 -0.04 10 2
Page 209 and 210: Table 31: Radioactivity measurement
Page 211 and 212: ick. There is approximately a facto
Page 213 and 214: Figure 152: A typical PMT response
Page 215 and 216: 1m π, µ 15 GeV/c mini-walls 1.6 m
Page 217 and 218: Electrons 1GeV/c 20mm Pb Number of
Page 219 and 220: tube. An Image Intensifier (II) by
Page 221 and 222: 1 0 0 l = 1 1 .8 m N, p.e. 1 0 1 0
Page 223: HPD’s pixels (Fig. 162). The cook
Page 227 and 228: The acquisition system (VA-DAQ) use
Page 229 and 230: The upstream tracker T 1-3 between
Page 231 and 232: Figure 168: Distributions of the ap
Page 233 and 234: Figure 169: Example of a large-angl
Page 235 and 236: multiple scattering, given the smal
Page 237 and 238: 9.1.3 Wall support structures An al
Page 239 and 240: Nevertheless, the possibility to us
Page 241 and 242: Figure 174: (a) 3D view of the spec
Page 243 and 244: 9 p.e. and 6.9 p.e. at a distance f
Page 245 and 246: Figure 176: Neutrino induced charm
Page 247 and 248: A test programme for emulsion brick
Page 249 and 250: The space requirements in the exper
Page 251 and 252: advance. The sets of scintillator s
Page 253 and 254: Task Name Start Finish Study of mai
Page 255 and 256: 11 Experimental infrastructure 11.1
Page 257 and 258: After the exposure to cosmic rays,
Page 259 and 260: on the size of these stations. A co
Page 261 and 262: Table 38: Expected contributions to
Page 263 and 264: the developed emulsions and to stan
Page 265 and 266: As the sensitivity is not limited b
Page 267 and 268: [26] M. Apollonio et al., Phys. Let
Page 269: [89] http : //tosca.web.cern.ch/T O
show all

Experiment Proposal - opera - Infn

Create successful ePaper yourself

Delete template?

Save as template?