1. solid state vs gas detectors Scintillator detector
Notes
solid state vs gas detectors ?
Silicon detector
GEM detector
Scintillator detector
Diamond detector

2. materials for thermal neutron conversion: which one?
(0.025)
≈ 940 b
157Gd
113Cd
(0.025)
≈ 240 kb
≈ 20 kb
large available E
but in form of gamma rays:
difficult neutron identification
6Li
available E
4.78 MeV
(0.025)
≈ 3840 b
10B
available E
2.79 MeV
(and gamma rays)

3. materials for thermal neutron conversion: which one?
6Li
(0.025)
≈ 940 b
available E
4.78 MeV
10B
(0.025)
≈ 3840 b
available E
2.79 MeV
(and gamma rays)
detection of 3H and/or 4He
detection of 4He (and 7Li?)
lower kinetic energy
≈ 1 gamma ray /capture
natural abundance: 7% vs 20%

4. converter deposition technique
solid state
gas
rough, simple, fast, cheap
delicate, complex, slow, cost?
substrate: glass, Al, C,...
substrate: ceramic,...?
substrate thickness ≈ 1µm?
substrate thickness ?
adherence: not quite relevant
adherence: mandatory

5. converter thickness measurement
solid state
gas
alpha source
4He
4He
AFM? other?
exploits the same detector
additional equipment needed?
rough, simple, fast, cheap
delicate, complex, slow, cost?
output in mg/cm2 of converter
output depends on chemistry?

6. overall mechanical structure
solid state
gas
robust, manageable
delicate, bulky?
little non-detector material
non-detector material?

7. easily assembled/disassembled needs gas flow?
operating features
solid state
gas
vacuum compatible
under vacuum?
low voltage
high voltage?
very stable
stability?
closed
sealed?
easily assembled/disassembled
needs gas flow?
no physical/chemical agents
on the converter
the converter sees gas, ions, electrical discharges

8. conclusions?
open discussion