applications of position sensitive detector (psd)...• 3he neutron cross section 5330barns •...
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Applications of Position Sensitive Detector (PSD)
F Mohamad Idris1,5,a), J A Murshidi1, K Yazid1, N Ashari2, A A
Mohamed3, A Azman4, W A T Wan Abdullah5, N Norjoharuddeen5, A H Baijan1, R Sabri1, M F Mohd Zin1, Mu
Mukhsin1
1Malaysian Nuclear Agency, Bangi, Selangor, 43000 Kajang, Malaysia. 2IRIS Corporation, Technology Park Malaysia, Bukit Jalil, 43000 Kuala Lumpur, Malaysia. 3Malaysian Nuclear Society, Kompleks Niaga Sungai Merab, Sepang, Selangor, Malaysia.
4University Tenaga Nasional, Jalan Ikram-UNITEN, 43000 Kajang, Selangor, Malaysia. 5National Centre for Particle Physics, University of Malaya, 50603, Kuala Lumpur, Malaysia.
aCoresponding author: [email protected]
contents
• PSD
• Its applications
– Tomography
– Nanomaterial characterization
– Charged particle trajectory
• Conclusion
Position sensitive detector (PSD)
• 3He proportional counter : Reaction: 3He + n -> 1H +3H + 764keV • 3He neutron cross section 5330barns
• neutron counts along the axis of detector
• Position resolution: <1.2mm
Typical difference pulse height spectrum in PSD[5]
3H
PSD with DAQ system Mesytech modules with MPSD-2, MCPD-8, Bias supply
(FPGA based)
1D PSD on MesyDAQ
• Neutron measurement with 1D PSD
3H~1n
Voltage: 975kV Common Gain: 5 Common Threshold: 60
3H~1n background
Display on MesyDAQ screen without cuts
Voltage: 975kV Common Gain: 25 Common Threshold: 60
Display on MesyDAQ screen with cuts
Neutron Tomography with 1D PSD
Small Angle Neutron Scattering (SANS) setup at Malaysian Nuclear Agency
Highly Oriented pyrolytic graphite: Neutron take off angle: 43o
HOPG mosaic
1D PSD Target sample collimator
shielding
1D tomography experiment [1]
Zinc-carbon battery
Data collected every 1o turn of sample for 360o
- Less background - Less spectrum hardening
shielding 2θm=86o
Bragg equation: nλ=2 d Sin θ
θ=43o take-off
d=3.354 Å graphite lattice λ = 4.58 Å neutron wavelength
1n: ϒ
Neutron tomography of Zinc-carbon battery
IgorPro based DAQ and image display[1]
Image reconstruction of new zinc-carbon battery 1.5V [1]
Image reconstruction of discharged zinc-carbon battery 0.9V showing the presence of hydrogen from NH4 and MnO2 reaction[1]
Zinc Zinc H2O
Cathode mixture
Cathode mixture
• Data were collected IgorPo based DAQ
• Image reconstructed using back filter projection method
2D PSD for nano material characterization
Scattering profile at 400cm sample LTCC (low ceramic ceramic co-fired) to detector position (wavelength = 3.9Å) [3]
Direct beam profile at 2-dimensional position sensitive detector (2D PSD) of mySANS, using
IgorPro based DAQ[3]
Intensity vs. scattering vector profile for tape sample sintered at 900oC. Oriented structure
possibly at 0.03 Å-1 [3].
2-D PSD at MySANS
1n: ϒ
Target sample position
-Momentum transfer:
q2 =(k - k’)2 -Guinier plot extract the size-scale for a structure by fitting the scattering intensity to an equation
Multilayered PSD in experimental particle physics
p, 920GeV
e 30GeV
)1020(
Sense wires
0
sK
222 pEmass
Charged particle momentum is measured using multilayered radially distributed 1D PSD in a magnetic field:
Solenoid
Magnetic field
Multilayer tracking wire inside a particle detector[4]
• Each wire sensor is numbered Each hit and position are recorded Particle is identified using the energy
deposition dE/dx • Momentum for each hit is regressed for each hit
in superlayers
Reconstruction of
Momentum of pions at (a) superlayer 3 (b) superlayer 5; (c) superlayer 7; (d) superlayer 9 of a tracking detector in high energy physics experiment (x-axis in GeV)
Momentum vs energy of pions at (a) superlayer 3 (b) superlayer 5; (c) superlayer 7; (d) superlayer 9 in high energy physics experiment (x-axis in GeV)
Reconstructed momentum (in GeV) of candidates (a) momentum of with (b) in x-direction; (c) y-direction (d) in z-direction [4]
0
sK
0
sK
Conclusion
• PSD has been used for reconstruction of
– image for tomography (1D)
– Guinier plot for nanomaterial characterization
– momentum of charged particles in high energy particle physics
References
1. N Abidin Ashari, Kajian teknik pengimejan menggunakan sumber neutron terterma, MSc thesis 2009, Universiti Sains Malaysia
2. N Abidin Ashari, J Mohamad Saleh, M Zaid Abdullah, A Aziz Mohamed, A Azman, R Jamro, Monochromatic Neutron Tomography Using 1-D PSD Detector at Low Flux Research Reactor, AIP Conference Proceeding Vol 978, 2008
3. A A Mohamed et al., Microstructural investigations of materials for low temperature co-fired ceramic (LTCC) based fuel cell using small angle neutron scattering, 2013 IOP Conf. Ser.: Earth Environ. Sci. 16 012141
4. F Mohamad Idris, Long-lived Neutral Hadrons In The Calorimeter Of The Zeus Detector, PhD thesis University of Malaysa, 2011
5. Reuter Stokes Helium-3 Filled Position Sensitive Proportional Counter – RS-P4-0424-201
6. https://www.swissneutronics.ch/products/focusing-monochromators/pg-graphit/
Backup slide
• Direct neutron exposure to PSD
Collimated neutron
Optical grade single sapphire crystal Al2O3
Optical grade single Bismuth crystal
PSD Filtered neutron beam