View of the HRPT gas mixture cleaning/adding system
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3H
p+3H
After cleaning CF4 added.
w=7%
counts
ch no.
HRPT PHS, monodetector 1.6kV.
Am-Be n-source. March’09
Before opening detector w=60%
p
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PHS
ch no. (December 1999) Dec’99 w=12%
ch no. (April 2009)
Comparison of PHS from Decemmer 1999 and the present one after cleaning (April 2009)
Apr’09 w=7%
Comparison of the Pulse Hight Spectra before (2008) and after (2009) HRPT gas cleaning/pressurizing
Ghost peak due to noise
Comparison of the diffraction patterns before (2008) and after (2009) HRPT gas cleaning/pressurizing
Intensity gain ~18%
data are normalized to the same neutron monitor
2009 2008