SFT is working ok, we have been taking ABS deuterium data since late last
night. Cross section is higher now that we are running the 60cm
cell. Expect 80% higher (?), see about 60-70% with ed elastic.
Early asymmetry results show that tensor polarization is now 45+-14% (was
50% with 40cm cell). Vector now 50%, poor statistics, seems lower than before.
BRP signal is weaker than before, good enough to tune transitions.
Compton shows large false asymmetry, beam tune needs more work.
Plan is to run ABS deuterium until Thursday, at which time we will open
the hall to fill the superconducting solenoids, change WC Helium, fill
buffer system, change ABS deuterium bottle. We also will probably
thermally cycle the target cell and try to improve vacuum.
Monitor SFT reverse to forward power ratio, should be about 0.3.
Will increase injection current to 120mA, dead time should still be less
than 20%.
Karen
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