The TOF-USANS Instrument for Japanese SNS - Spallation Neutron ...
The TOF-USANS Instrument for Japanese SNS - Spallation Neutron ...
The TOF-USANS Instrument for Japanese SNS - Spallation Neutron ...
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10 -5<br />
pulse<br />
Per<strong>for</strong>mance of <strong>TOF</strong>-<strong>USANS</strong><br />
case of Si (111) setting<br />
10 -4<br />
reactor<br />
10 -3<br />
q (nm -1 )<br />
10 -2<br />
λ=0.255nm<br />
(111)<br />
10 -1<br />
(333)<br />
(999)<br />
(555)<br />
(444)<br />
(888)<br />
(777)<br />
λ/1=0.255nm<br />
10 0<br />
Calculated q-range of <strong>TOF</strong>-<strong>USANS</strong> and reactor-<strong>USANS</strong><br />
<strong>TOF</strong>-<strong>USANS</strong><br />
q =~ 2×10 −5 − 0.5 nm −1<br />
Gain ~<br />
( )<br />
m Ip n<br />
∑ =~12,<br />
n=1<br />
I r<br />
n =1,3,4,5,7,8,9<br />
Ip n<br />
I r<br />
() : neutron flux <strong>for</strong> nth order reflection<br />
at pulsed source<br />
: neutron flux at reactor source<br />
Reactor-<strong>USANS</strong><br />
q =~ 2×10 −4 − 0.05 nm −1