CCD Readout of GEM Based Neutron CCD Readout of GEM Based Neutron Detectors Detectors F.A.F. Fraga, L.M.S. Margato, S.T.G. Fetal, F.A.F. Fraga, L.M.S. Margato, S.T.G. Fetal, M.M.F.R. Fraga, R. Ferreira Marques, A.J.P.L M.M.F.R. Fraga, R. Ferreira Marques, A.J.P.L Policarpo, B. Guerard, A. Oed, G. Manzini and Policarpo, B. Guerard, A. Oed, G. Manzini and T. van Vuure T. van Vuure LIP - Coimbra and Departamento de Física da LIP - Coimbra and Departamento de Física da Universidade de coimbra, 3004-516 Coimbra, Portugal Universidade de coimbra, 3004-516 Coimbra, Portugal I I nstitute Laue Langevin, BP 156X, F-38042 Grenoble nstitute Laue Langevin, BP 156X, F-38042 Grenoble Cedex, France Cedex, France D D elft University of Technology, IRI-ISO, Mekelweg 15, elft University of Technology, IRI-ISO, Mekelweg 15, NL 2629 JB Delft, The Netherlands NL 2629 JB Delft, The Netherlands
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CCD Readout of GEM Based Neutron Detectors F.A.F. Fraga, L.M.S. Margato, S.T.G. Fetal, M.M.F.R. Fraga, R. Ferreira Marques, A.J.P.L Policarpo, B. Guerard,
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CCD Readout of GEM Based Neutron DetectorsCCD Readout of GEM Based Neutron Detectors
F.A.F. Fraga, L.M.S. Margato, S.T.G. Fetal, M.M.F.R. Fraga, R. F.A.F. Fraga, L.M.S. Margato, S.T.G. Fetal, M.M.F.R. Fraga, R. Ferreira Marques, A.J.P.L Policarpo, B. Guerard, A. Oed, G. Ferreira Marques, A.J.P.L Policarpo, B. Guerard, A. Oed, G. Manzini and T. van VuureManzini and T. van Vuure LIP - Coimbra and Departamento de Física da Universidade de coimbra, 3004-LIP - Coimbra and Departamento de Física da Universidade de coimbra, 3004-516 Coimbra, Portugal516 Coimbra, Portugal
IInstitute Laue Langevin, BP 156X, F-38042 Grenoble Cedex, Francenstitute Laue Langevin, BP 156X, F-38042 Grenoble Cedex, France
DDelft University of Technology, IRI-ISO, Mekelweg 15, NL 2629 JB Delft, The elft University of Technology, IRI-ISO, Mekelweg 15, NL 2629 JB Delft, The
NetherlandsNetherlands
SummarySummary
• Gaseous detectors: GEMs and CCDs
• Experimental setup
• Gain and scintillation for GEMs with different diameters holes
• Electron transparency and transfer with GEMs
• Neutron detection in 3He-CF4
• High pressure Xe/TMA
• Conclusions
A
A
A
H.V.
PowerSupply
CC
D
30 Cm
A
Keithley 602electrometer
X - RayTube
Schematic view of the system used in GEMs study
The GEM - gas electron multiplierThe GEM - gas electron multiplier
• CCD camera: QUANTIX 1400 (PHOTOMETRICS)
• Number of pixels 1317 x 1035 (6.8 x 6.8 m2 pixels)
• Binning - 2x2 up to 7x7
- less position resolution but lower noise!
• Nikon f50 d1.8 photographic lens with C mount adapter
• Quantum efficiency of the Quantix 1400 camera versus wavelength
0
10
20
30
40
50
60
300 400 500 600 700 800 900 1000 1100
Wavelength (nm)
Qun
atum
effi
cien
cy (%
)
CCD readout of GEM scintillationCCD readout of GEM scintillation
References “Quality control of GEM detectors using scintillation techniques”, F.A.F.
Fraga , et. al ., NIM 442(2000)417. "X-ray imaging detectors based on the Gas Electron Multiplier
scintillation light", F.A.F. Fraga, et. al., accepted for publication in IEEE 1999 TNS.
“Performance of a Tracking Device Based on the GEM Scintillation”, F.A.F. Fraga, L.M.S. Margato, S.T.G. Fetal, R. Ferreira Marques and A.J.P.L Policarpo, presented at the IEEE2000, Lyon, France.
Alpha and cosmic ray tracks taken with Ar-40%CFAlpha and cosmic ray tracks taken with Ar-40%CF44