Thickness of the front face

No. Name Material Thickness X X0
1 Incident Window Aluminum 0.1 mm 8.9 cm 0.001
2 Vacuum Vacuum 0.0 mm 0.0 cm 0.000
3 Honeycomb SUS314 20 mm 0.039
4 PMT Cover Acrylic 5+11 mm 34.7 cm 0.014+0.032
5 PMT Tip Tube Pyrex Glass 0.916 mm 12.6 cm 0.074
6 PCB G10 2 mm 18.5 cm 0.011
7 PMT Tube SUS304 30 mm 1.75 cm 1.714
8 PMT Window Synthetic Quartz 3 mm 12.3 cm 0.024
9 LXe LXe - 2.87 cm -
10 Metal Channel Dynode SUS+α 12x 0.0126 mm 1.76 cm 0.086
11 front holder G10 29 mm 18.5 cm 0.157

Total Radiation Length

path A: 0.24 X0
path B: 0.24 X0

Compounds

G10 (60% SiO2 + 40% epoxy)

Acrylic (PMMA; polymethylmethacrylate)

C:H:O=5:8:2 (atom)
d=1.16 g/cm3

Synthetic Quartz (SiO2)

Si:O=1:2 (atom)
d=2.20 g/cm3

SUS304

Fe:Cr:Ni=74:18:8 (weight)
d=7.93 g/cm3

SUS314

Fe:Cr:Ni=74:18:8 (weight)
d=7.93 g/cm3

Pyrex Glass (83% SiO2 + 12% B3O + 5% Na2O)

O:Si:B:Na=0.538:0.388:0.037:0.037 (weight)
d=2.23 g/cm3
MEG Home Page
K. Ozone, Feb 16th, 2003