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Chelsea L. HarrisChelsea L. Harris11
Rand WatsonRand Watson22
1. Texas Southern University; Houston, Texas 770472. Texas A&M Cyclotron Institute; College Station, Texas 77843
(Summer III)(Summer III)
A Pyro-Electric Crystal A Pyro-Electric Crystal
Particle AcceleratorParticle Accelerator
PurposePurpose
To continue modifications to the pyro-electric To continue modifications to the pyro-electric crystal particle accelerator to increase the neutron crystal particle accelerator to increase the neutron counting rate above background.counting rate above background.
To optimize a pyro-electric crystal particle To optimize a pyro-electric crystal particle accelerator to accelerate deuterons to sufficient accelerator to accelerate deuterons to sufficient energies to initiate d + d fusion reactions. energies to initiate d + d fusion reactions.
OverallOverall
ImmediateImmediate
MechanismsMechanismsD +D D +D 33He + n He + n (Q = 3.3 (Q = 3.3 MeV)MeV)
D + D D + D T + p T + p (Q = 4.0 (Q = 4.0 MeV) MeV)
Tunneling EffectTunneling Effect
From R. Dunlap, The Phy. Of Nuc. And Part. (2004) 179.
ApplicationsApplications
Pyro-Electric CrystalsPyro-Electric Crystals
The Particle AcceleratorThe Particle Accelerator
The Detector SystemsThe Detector Systems
The Particle AcceleratorThe Particle Accelerator
The Crystal and MountThe Crystal and Mount
LiTa0LiTa033
The Inner ChamberThe Inner Chamber
The Inner ChamberThe Inner Chamber
X-Ray SpectrumX-Ray Spectrum
Energy in keV
0 20 40 60 80 100
Co
un
ts
1e+0
1e+1
1e+2
1e+3
1e+4
1e+5
1e+6Run 10 H @ 1 m Torr D2 – 7/10/07
Cu K-alpha
Cu K-beta
“Pile-up Peaks”
Ca Ti Cr
Energy in keV
0 20 40 60 80
Co
un
ts
1
10
100
1000
10000
X-Ray SpectrumX-Ray Spectrum
Zn kβ
Fe kα
Cd kαCd kβ
Run 10 C @ 1 m Torr D2 – 7/10/07
Fe kβZn kαS kα/kβ
Time (s)
0 300 600 900 1200 1500 1800 2100 2400 2700 3000 3300 3600
Ne
utr
on
Co
un
ts p
er
10
se
cs
0
2x101
4x101
6x101
8x101
102Te
mp
era
ture
(oC
)
20
40
60
80
100
120
140
160
<------------------Cooling------------------>
Co
un
ts p
er
ten
se
co
nd
s
100
101
102
103
104
105
Run 10 -D2 +C Target-7/10/07
CountCountss
76 Counts
49 Counts
CountCountss
~80 keV / 2 millitorr
What Now?What Now?•Vary current and pressure…Vary current and pressure…
•Attach a larger, more efficient Attach a larger, more efficient neutron detector…neutron detector…
•Use two pyro-electric crystals…Use two pyro-electric crystals…
•Reproduce results …Reproduce results …
AcknowledgmentsAcknowledgments
Dr. Rand Watson Dr. Rand Watson
National Science FoundationNational Science Foundation
Texas A&M Cyclotron Texas A&M Cyclotron InstituteInstitute
Texas Southern UniversityTexas Southern University
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