LASL INTENSE 14-MeV NEUTRON SOURCE. Page: 7 of 12
This report is part of the collection entitled: Office of Scientific & Technical Information Technical Reports and was provided to Digital Library by the UNT Libraries Government Documents Department.
The following text was automatically extracted from the image on this page using optical character recognition software:
Fig. 6. Specific yield for thick target.
Fig. 7. Specific yield for almost thick target.
significant fraction of the beam energy passes
through and the range (more properly thickness) is
reduced. For instance Eout = 50 keV would provide
an energetic triton beam for separation but would
reduce the yield by only 0.7%. The range would be
reduced 30% and the specific yield per deposited-
in-the-gas joule increased 21%.
If it should turn out that the gas target
thickness and power capability are much more diffi-
8 cult and expensive than beam intensity and power,
then it might be advantageous to use a significantly
thinner target. That is, to go some way toward op-
5E timizing the yield per target joule at the expense
U of the yield per beam joule. For the present, how-
4 ever, we shall continue with the "almost thick"
3 Q III. GAS TARGET
Or The model thus far consists of a triton beam
2 at 270 keV incident upon a deuterium target of
Q thickness R = 3.63 x 1019 atoms/cm2 = 1.82 x 1019
molecules/cm2. The beam exits at 50 keV yielding
1.26 x 10-" neutrons/triton or 2.93 x 109 neutrons/
0 beam-joule or 3.59 x 109 neutrons/gas-joule.
The target is sketched in Fig. 8 as two cross-
ed beams: a T+ current I and a D2 current F. The
reaction volume is sketched as a solid rectangle
w x i x h, not to indicate that such a geometry
would be used, but because the computation is sim-
plified. The neutron production will be
N = 1.26 x 10-" I
= 0.787 x 10i5 I, neutrons/sec
for I in amps.
0 100 200 300
BEAM ENERGY. Ein, keV
3 - -
I T' DEAM
E1N 270 keV
0 i i I a i i i
BEAM EXIT ENERGY, EouT, keV
/ / Ih
I T+ /0
Fig. ~ ~ ~ I I. Sktho ecto oue
Here’s what’s next.
This report can be searched. Note: Results may vary based on the legibility of text within the document.
Tools / Downloads
Get a copy of this page or view the extracted text.
Citing and Sharing
Basic information for referencing this web page. We also provide extended guidance on usage rights, references, copying or embedding.
Reference the current page of this Report.
Henderson, D.B. LASL INTENSE 14-MeV NEUTRON SOURCE., report, January 1, 1972; New Mexico. (https://digital.library.unt.edu/ark:/67531/metadc1026021/m1/7/: accessed April 22, 2019), University of North Texas Libraries, Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.