September 23, 2011

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Beam Parameters:

• current 160 mA
• pulse width 2 ns
• rep rate 180 Hz
• E = 25 MeV

H2O run

Run #	Beam	Dump magnet	Collimator	add coll	Hardener 1" Al	Radiator 25 um Al	Target	Comments
2546	Up 90A	In	Open	In	No	In	H20 bottle	Test radiator in/out. R(bottom) = 2.5E-4 n/pulse -> × 180 Hz × 60 sec/min = 2.70 n/min R(upstream) = 40.9E-3 e+/pulse
2547	Up 90A	In	Open	In	No	Out	H20 bottle	Test radiator in/out. R(bottom) = 6.1E-6 n/pulse -> × 180 Hz × 60 sec/min = 0.06 n/min R(upstream) = 1.68E-3 e+/pulse About 96% of photons are coming from the radiator according to PS.
2548	Down 86A	In	Open	In	Yes	In	H20 bottle	Test radiator in/out. R(bottom) = 1.08E-4 n/pulse -> × 180 Hz × 60 sec/min = 1.17 n/min R(upstream) = 34.9E-3 e+/pulse
2549	Up 90A	In	Open	In	Yes	In	H20 bottle	Test radiator in/out. R(bottom) = 1.43E-4 n/pulse -> × 180 Hz × 60 sec/min = 1.54 n/min R(upstream) = 37.4E03 e+/pulse
2550	Down 86A	In	Open	In	Yes	In	H20 bottle	Test radiator in/out. R(bottom) = 1.72E-4 n/pulse -> × 180 Hz × 60 sec/min = 1.86 n/min R(upstream) = 33.8E-3 e+/pulse
2551	Down 86A	In	Open	In	Yes	Out	H20 bottle	Test radiator in/out. R(bottom) = 0 n/pulse -> × 180 Hz × 60 sec/min = 0 n/min R(upstream) = 2.8E-3 e+/pulse About 92% of photons are coming from the radiator according to PS.

D2O run

Run #	Beam	Dump magnet	Collimator	add coll	Hardener 1" Al	Radiator 25 um Al	Target	Comments
2552	Up 90A	In	Open	In	Yes	In	DU cylinder	R(bottom) = 8.7E-4 n/pulse -> × 180 Hz × 60 sec/min = 9.40 n/min R(upstream) = 35.8E-3 e+/pulse
2553	Down 86A	In	Open	In	Yes	In	DU cylinder	R(bottom) = -- n/pulse -> × 180 Hz × 60 sec/min = -- n/min R(upstream) = -- e+/pulse
2554	Down 86A	In	Open	In	Yes	Out	DU cylinder	R(bottom) = -- n/pulse -> × 180 Hz × 60 sec/min = -- n/min R(upstream) = -- e+/pulse
2555	Down 86A	In	Open	In	Yes	In	None	R(bottom) = -- n/pulse -> × 180 Hz × 60 sec/min = -- n/min R(upstream) = -- e+/pulse

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